4-Port Enhanced Digital USB
KVM Switch Over IP
with File Transfer
SV441DUSBI
Instruction Manual
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Instruction Manual
Table of Contents
Introduction .................................................................... 1
Features ......................................................................................2
Package Contents .......................................................................3
Hardware Guide............................................................... 4
Front Panel ..................................................................................4
Installation....................................................................... 6
Device Connection ......................................................................6
Initial Power-Up ...........................................................................7
Operation......................................................................... 8
Initial IP-OSD Setting...................................................................8
Mouse Setting..............................................................................11
KVM Switch OSD Operation........................................................12
Data-Transfer Rule ..................................................................13
USB Port Rule.........................................................................14
Using the Web Interface.................................................. 15
The Login Screen........................................................................15
Web Interface Introduction...........................................................16
Main Menu Selections .................................................................17
Network Configuration.................................................................22
User Accounts.............................................................................23
System Identification ...................................................................24
Security .......................................................................................24
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Compatibility................................................................................25
SNMP..........................................................................................25
RADIUS.......................................................................................25
Modem.........................................................................................26
Serial Ports..................................................................................26
Time / Date..................................................................................26
Firmware .....................................................................................26
Purchase Options....................................................................27
Status ..........................................................................................28
Port Numbers ..............................................................................28
Help Menu...................................................................................29
Site Map Menu ............................................................................29
Copyright Menu ...........................................................................29
Using the Terminal Interface via Serial Port.................................29
Accessing the VNC Interface.......................................... 30
Web Interface ..............................................................................30
Native VNC Client........................................................................31
SSH Tunnel (with Native VNC client)...........................................31
Using the VNC Menu...................................................................32
Bribar Feature..............................................................................33
Main Menu...................................................................................34
VirtKeys Menu .............................................................................36
Video Tuning menu......................................................................37
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Accessing KVM Features ............................................... 38
OSD Operations ..........................................................................38
OSD Function Keys.....................................................................39
Hot Key Commands.....................................................................42
Changing Your Configuration.......................................................43
Optimizing video performance....................................... 45
Choose the best video mode.......................................................45
Noisy video cards........................................................................45
Network performance..................................................................45
Using the Advanced Video Tuning Feature..................................46
Using the Modem feature ............................................... 47
Background .................................................................................47
Connecting a Modem ..................................................................48
Modem configuration...................................................................49
Configuring the Remote Connection ...........................................50
Accessing the Web Interface.......................................................51
Modem Troubleshooting Guide....................................................53
Serial Remote Control operation ................................... 54
Background .................................................................................54
Connecting Serial Remote Control Modules ...............................54
Using the Web Interface ..........................................................54
Advanced Configuration Using the Integrated SSH Shell............56
Remote Login via SSH................................................................57
Operating Notes.............................................................. 57
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About Security Certificate Warnings............................................58
Installing the New Certificate.......................................................59
Troubleshooting.............................................................. 60
Specifications.................................................................. 62
General Specifications.................................................................62
Supported Protocols....................................................................63
Technical Support........................................................... 65
Warranty Information...................................................... 65
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Introduction
Thank you for purchasing a StarTech.com 4-Port IP KVM Switch with
USB Console. The SV441DUSBI revolutionizes remote server manage-
ment by combining our industry-leading, third generation Server Remote
Control technology with a proven Enterprise class digital KVM switch.
The SV441DUSBI empowers you to securely manage up to four comput-
ers remotely from almost anywhere using the internet or your local area
network (LAN). Unlike software solutions that require installation and work
through your server’s operating system, the SV441DUSBI gives you BIOS
level control and full interaction with your system’s boot process. Control
does not come at the expense of security: SSH tunneling, SSL encryp-
tion, RADIUS authentication, and a configurable firewall are all included
to ensure that your network stays secure. Its standardized 1U rack-mount-
able metal chassis allows easy installation in your existing rack or cabinet
solution.
Server Remote Control is about more than just servers. Using the Serial
Remote Interface Module (RPORT), you can interact with virtually any
device that uses a RS-232 serial terminal interface like routers, switches,
environmental controls, alarm systems, and more.You can also use
StarTech.com’s 8 outlet Remote Power Module (PCM815SHNA) to power
computers and equipment on an off using an interactive menu.
The SV441DUSBI is the perfect solution for any organization that
demands secure, flexible, local and remote administration of its critical
systems.
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Features
• Able to connect to USB devices such as a keyboard, mouse, USB
hard drive, USB CD-ROM, or USB flash drive
• Access to the web console is user ID and SSL password secure. The
Remote Server Management over IP supports 32 user accounts and
incorporates SSL encryption of session data, and SSL web
communication encryption
• Allows for disk emulation and file transfers, including complete remote
application and operating system installations
• Auto Scan Mode lets you switch between computers for easy
monitoring
• Compact 1U rack height takes up very little cabinet or rack space
• Each computer name can be defined via the OSD menu
• Flash upgradeable
• Hot-pluggable feature allow computers to be added or removed without
shutting down
• Includes an onboard Web Server, providing browser-based
configuration and administration
• Multiple user accounts restricts access to authorized users and stores
personal settings
• Network Setup and Reset buttons
• No software or drivers required
• Obtains an IP address using either DHCP or manual configuration
• Plug and Play compliant
• Supports 16-bit video
• Supports customized SSL certificates
• Users can reboot the system, access the BIOS, and have full control
over the keyboard and mouse - as if they are on site
• Works with PC, Mac, and Linux
• Optional mounting bracket
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Package Contents
• 1 x SV441DUSBI
• 1 x User’s Manual
• 4 x KVM Cables
• 1 x Package of screws
• 1 x Power Adapter
• 1 x Power Cord
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Hardware Guide
Front Panel
2
4
6
8
1
3
5
7
9
1. Power Supply
Connects to a DC 12V power adapter.
Connect to the console monitor.
2. HDB15 Connector
3. USB Type A Connectors Connect to the console keyboard and
mouse ports.
4. Port LED Indicator
5. Setup Button
Displays the status of connected PCs (for
more specific instructions, see the table
below).
Press this button to bring up the IP-OSD
menu.
6. RJ-45 Connector
7. RS-232 Connector
8. Reset Button
Connects to the LAN.
Connects to a PC for initial setup.
This dual-function button selects Power
Reset or Restore Factory Defaults.
9. Auxilliary Input
Link - Reserved for multimedia module.
LED Color
Green
Red
Meaning
Connected to a PC that is powered on.
Port selected.
Blue
Data-transfer function is enabled.
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LED Color
Meaning
Connected to a PC that is powered on and
possesses the data-transfer function.
Green + Blue (Light Blue)
The selected port possesses the data-
transfer function.
Red + Blue (Light Purple)
Red + Green (Yellow)
The PC that is powered on is selected.
The selected and powered on PC
possesses the data-transfer function.
Red + Green + Blue (White)
Rear Panel
2
1
3
1. R-Port
For serial device management with Serial
Supervisor.
2. USB Type A Connectors Two additional ports for any USB devices
(e.g. memory, printer, etc.).
3. HDB15 Connectors
Connect to 4 servers (or PCs)
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Installation
Device Connection
1. Connect the USB keyboard, mouse, and monitor to the console
connectors on the SV441DUSBI.
2. Connect a Cat5 cable to the LAN port of the SV441DUSBI.
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3. Power up the monitor and the SV441DUSBI. The IP-OSD menu should
come up automatically. Follow the on-screen instructions to finish the
initial setup.
Initial Power-Up
You must power up the SV441DUSBI with a keyboard, mouse, and moni-
tor connected before turning on any other devices.
Ensure that the devices you are connecting are powered off before con-
necting them to the unit.
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Operation
Initial IP-OSD Setting
Power on the monitor and the SV441DUSBI. The IP-OSD menu will
automatically appear. Follow the on-screen instructions to complete the
initial setup.
Press the Enter key to enter the
Advanced Settings Menu. Once the
desired settings have been achieved,
press ESC to close the Menu.
It is reccomended that you change
the password immediately and make
a note of it.
Press Enter to go to the next menu.
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The IP KVM can have its IP address
assigned dynamically, or it can be
given a fixed IP address. If you are
unaware of the IP address, obtain it
from the network administrator.
Press Enter to go to the next menu.
Enter the Netmask (Consult your
network administrator if necessary).
Enter the Gateway (Consult your
network administrator if necessary).
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Enter the address (Consult your net-
work administrator if necessary).
Wait for the SV441DUSBI to apply the
setting changes.
Press the Enter key.
Press Enter to complete the setting
process.
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Mouse Setting
Many operating systems offer a feature called mouse acceleration that
allows the user to adjust the responsiveness of the cursor on the screen
to the physical movements of the mouse. While this is usually a beneficial
interface enhancement, it can interfere with the operation of the unit and
should be disabled on the managed computers before a remote session
is attempted. Follow the instructions below to disable mouse acceleration
for the operating system installed on each managed computer.
1. Open the Mouse Properties application located in the Control Panel.
2. Under the Motion heading, center the arrow used to modify the pointer
speed.
3. Disable the Enhance Pointer Precision setting by unchecking its
respective checkbox.
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KVM Switch OSD Operation
To enter the Hotkey Menu, press the Ctrl key twice within two seconds.
• L-CTRL is the Ctrl key located on the left side of the keyboard.
• 1~8/A~H are the number keys 1-8 located in the upper row of the
keyboard, and the character keys A-H (not case sensitive).
Please Note: Do not use the keypad at the right of the keyboard.
To enter the KVM Menu, press the Ctrl key three times within two
seconds. Once entered, the menu will display a list of the connected
computers with corresponding port numbers, names, and statuses, as
shown below.
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To access additional menu functions, press the F4 key. A new screen will
appear displaying more functions, as shown below.
To access the remaining menu functions, press the F4 key again. This will
bring you to the screen shown below.
Data-Transfer Rule
Manual stick-on: Data-Transfer function resides in one particular KVM-
Channel, pressing Ctrl + Ctrl + T to switch to the next KVM-Channel.
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Tracking KVM-Channel: Data-Transfer function tracks the selected KVM-
Channel.
USB Port Rule
Manual stick-on: USB-Port resides in one particular KVM-Channel,
pressing Ctrl + Ctrl + U to switch to the next KVM-Channel.
Tracking KVM-Channel: USB-Port tracks the selected KVM-Channel.
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Using the Web Interface
The Web interface is the most intuitive way to configure the SV441DUSBI,
offering a Java-based VNC client that can be used to control the host
computer from a remote location, as well as support for any industry-
standard HTML Web browser.You can access the Web interface by open-
ing your Web browser and entering the IP address of the SV441DUSBI
you wish to access/configure. The IP address will be either a) the address
assigned by your DHCP server as identified in the previous section, or b)
192.168.1.123 if your network uses static IP addressing.
The Login Screen
Before you can access the Web configuration interface, you must enter
a username and password. The default username and password as
shipped from the factory is username admin, with a password of admin.
NOTE: Before the login screen appears, your web browser may display
a warning about an invalid security certificate. This does not affect the
security of your data in any way. Whenever you are prompted about a cer-
tificate security problem by your browser or the Java VNC client, always
choose the option to continue.
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Web Interface Introduction
After the inital login screen, the screen is divided into several sections, a
number of which will remain on the screen at all times while viewing the
Web Interface:
Name
Main
Menu
Name: At the top of the screen, the name of the machine being controlled
is displayed
Main Menu: At the left-most side of each page, the Main Menu is dis-
played, allowing users to choose functions offered by the Web Interface.
Help area: The right-most column offers an optional help summary for
each page. If you don’t wish to use this information, it can be closed by
clicking the small [x] at the top right (within the Web Interface). If closed,
click on the Help button near the top right of each page to re-display it.
Please note: The aforementioned sections of the Web Interface will
remain on the screen at all times. Selected categories will be displayed in
the center of the screen.
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Main Menu Selections
Please note: Some of the following items may not be present based on
assigned user privileges (i.e. non-admin users will not see any items
under the Admin category).
Home: The Home screen offers a Screen Thumbnail view of the
controlled computer, as well as basic file transfer functions, Monitoring
Information, System Identification and VNC Client options:
Preferences: The Preferences screen offers several configuration op-
tions pertaining to the functionality of the SV441DUSBI. Here, you are
able to customize settings to optimize overall performance (i.e. Encryption
options, VNC options, display and bandwidth options etc.), according to
each user’s individual preferences. Please save your selections by click-
ing the Save Changes button.
Snapshots: The Snapshots screen allows you to view and save a
screenshot of the controlled computer in its current state. This screenshot
will update periodically (automatically). Saved image files are stored in
.PNG format.
Logout: Clicking on Logout will terminate your Web Interface section. To
re-initiate the Web Interface, you will be required to re-enter your user-
name and password.
VNC: To launch or disconnect a Virtual Network connection with the con-
trolled computer, click on Connect or Disconnect as appropriate.
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File Transfer
The SV441DUSBI is able to emulate a virtual USB disk drive on any host
connected using the USB Server Interface Module (SV5USBS). Depend-
ing on configuration, it will appear to the host as a floppy drive (1.44MB),
an 8MB RAM Disk or a CD-ROM. The host computer does not require
any special drivers or other configuration.You can transfer files to the
virtual disk at any time.
SV441DUSBI will wait until the host is not using the disk, and add or
remove the files.
When the host computer next looks at the drive, it will notice the changes.
You can read files from the virtual disk at any time, as long as the host is
not actively writing to the disk. All of this happens in the background, and
you may treat the virtual disk as a shared drive without any restrictions.
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• Access to the files is performed through the web interface. Contents of
the root directory are shown on the home page.You can download files
as you would any file on the web (right-click and Save target as).
• To upload a file, click Browse, select a file, and then click Upload.
• Files and directories may be deleted using the Delete button situated
to their right.
When emulating a floppy disk or RAM Disk, the data is stored in RAM on
the SV441DUSBI itself. In order to emulate a CD-ROM disk drive, a web
server is required to provide the CD-ROM image data. The Web server
must be accessible to the unit, which communicates with it constantly as
data is needed.
Floppy mode: Choose the Format as floppy button to switch to floppy
mode. Under Windows, the drive will be identified as a “high density
floppy” and will typically be assigned a drive letter of B:
The capacity is limited to 1.44 megabytes in this mode. The purpose
of supporting floppy mode is to permit the use of floppy-disk images
generated by other systems (e.g. the flash BIOS upgrade process is
performed with a special floppy and is bootable, emergency repair disks
are often floppy-based etc.).You can transfer bits from that floppy to the
SV441DUSBI (use the upload disk image form) and boot from the special
floppy.
CD-ROM Mode:The SV441DUSBI does not store any data in this mode.
Instead, it emulates a USB CD-ROM drive with a disk inserted. The data
from that disk must be provided by an external web server. You will need
a copy of the CD-ROM contents that you want to emulate as an ISO file.
This is a byte-for-byte copy of track one (the data track) of a data CD-
ROM. The ISO file must be made available on a web server that can be
accessed by SV441DUSBI. To switch to this mode, type in a URL pointing
to the ISO image, and click on Commit. The system will connect to the
web server and test the file for access. If successful, you will be shown a
short report on the file contents, and the disk will be ready to use.
Please note that the only way to preview or browse the contents of the
CD-ROM image, is from the host.
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CD-ROM Web Server Requirements:
• Data must be hosted on a web server that the SV441DUSBI can
access directly.
• An image of a bootable CD-ROM disk can be used by the BIOS to boot
an operating system.
• The image file itself may be any size, but it will typically be less than
700Mb. Normally this file will be an ISO image (an ISO-9660 file
system) but any disk image may be used.
• The web server must support “byte ranges”. Persistent connections are
used, if available, as this greatly improves performance. “Read-only”
access is provided; writing is not supported.
• CD-Rom block size must be 2048 bytes. XA-Data type tracks are not
supported.
RAM Disk mode: Choose the Format as RAM Disk button to switch to
RAM Disk mode. This mode is intended to facilitate simple data transfer
between the remote user and the host computer. It will be recognized by
Windows as an 8MB removable disk and assigned a drive letter.You can
easily drag and drop files up to 8MB in size to this device.
Disk Formats: When you choose the Format as... button, the disk image
stored in RAM is formatted as an empty MS-DOS disk, with a single file
called Put files here...TXT.
SV441DUSBI is able to read most MS-DOS/Windows formatted disks and
presents the files via the Web interface. However, disk emulation occurs
at the lowest level, so other disk formats can be used if you have the tools
needed to create and read the disk images.
At the bottom of the page are the upload and download options for the
entire disk image. Any image that is exactly 1,474,560 bytes long will be
treated as a floppy. Images of other sizes are supported up to 8MB.
Booting from USB Disk:
If the host computer’s BIOS supports USB boot devices, it is possible to
boot from the emulated CD-ROM or floppy - allowing complete operating
system replacement without any on-site intervention.
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The first step is getting a bootable disk image onto the emulated floppy
or CD-ROM. For CD-ROM images, you will need an .ISO image from a
disk that contains special bits to enable booting (“El Torito” standard).
Nothing special is needed when reading the ISO from a working, bootable
CD-ROM.
Please note that each BIOS manufacturer offers varying levels of sup-
port for USB boot devices and may require configuration methods that
are unique (to the manufacturer) in order to utilize this feature. Similarly,
please note that many BIOS’s provide a simplified USB host stack and
offer drivers that may not offer suitable reliability.
To create a bootable floppy, you can format the emulated floppy from the
target system, or read the data from a working boot floppy. This can be
done from Windows using Disk Copy (right click on the drive letter in the
Windows Explorer) or by using a program like “RAWRITE”.
Once you have a bootable image (CD-ROM or floppy) working on the
Enterprise Class KVM unit, you must adjust your BIOS settings to tell it to
boot from a USB device.
Please note: You must select USB CD-ROM as the boot device for the
BIOS, if using a CDROM image and USB Floppy if using a floppy image.
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Network Configuration
DHCP: Automatic network configuration using DHCP is: Enabled/Dis-
abled. This feature applies only to the LAN port on the rear panel, and is
enabled by default. When enabled, the unit will automatically configure
itself with an IP address when a DHCP server is present. When disabled,
the LAN port will use the values assigned to it on the IP Addresses and
Routing table below.
IP Addresses and Routing: This table allows you to assign IP informa-
tion for the LAN and WAN ports separately. If you are using DHCP, the
values for the LAN port will be filled in automatically and any changes
made will not affect the setup.
Domain Name Server: This section allows you to specify DNS servers
and the default DNS domain suffix in use on the network. If DHCP is
enabled, some of these values may be supplied automatically.
Clicking the Commit button applies any changes made on this page, but
leaves the old settings active until the next time the unit restarts. Click-
ing Make changes effective now applies the changes and restarts the
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SV441DUSBI so the new settings take effect immediately.
Ethernet Address (MAC Address): This is the Ethernet hardware
address of this unit’s LAN port. It is set at the factory and cannot be
changed.You may need this number to configure your DHCP server.
Dynamic DNS Configuration: Dynamic DNS (DDNS) is a method, proto-
col, or network service that allows a networked device using the Internet
Protocol Suite to notify a domain name server to change, in real time, the
active DNS configuration of its configured hostnames, addresses or other
information stored in DNS.
Today, numerous providers, called Dynamic DNS service providers, offer
such technology and services on the Internet. They provide a software cli-
ent program that automates this function. The client program is executed
on a computer or device in the private network. It connects to the service
provider’s systems and causes those systems to link the discovered pub-
lic IP address of the home network with a hostname in the domain name
system. Depending on the provider, the hostname is registered within a
domain owned by the provider or the customer’s own domain name.
User Accounts
This menu will allow you to add accounts other than admin to the system.
These accounts will not have the authority to change settings, but can
access the Web interface and log into the VNC console. Selecting Delete
permanently removes the user from the system. If you enter values for
a user that does not already exist under Edit User Details, the system
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will create that user for you when you click Record changes. If the user
already exists, you may change the password for that user.
System Identification
Machine Name: This is the name that is used
to uniquely identify this machine.You may wish
to create a DNS entry that matches this name.
The name is provided as the Client Name for
the DHCP server. It is also shown at the top of
each page in the web browser interface and is
the “desktop name” for VNC clients.
Other identification details: These values are
for information purposes. They are visible from
the VNC client and via SNMP (if enabled).
Location: This string is sent as the system.sys-
Location value over SNMP. It should describe the location of this system.
Contact Name: This string is sent as the system.sys Contact value over
SNMP. It should describe who to contact regarding this machine. Typically
it includes an email address.
Network Address: This value is not used in our configuration, but is
meant to store a user-defined value that identifies the controlled machine
on the network. The official DNS name of the controlled machine is an
obvious value to put here, but you may use it for any purpose.
Description: A user-defined description for the controlled machine.
Security
This menu allows you to configure a number of set-
tings, including the admin password. Be careful when
making any changes remotely, as altering these
features could make the unit inaccessible through Web
configuration (i.e. due to firewall filtering). Note that any
password changes you make will have to be entered
twice to protect against user error.
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Compatibility
The Compatibility menu offers
features that may provide en-
hanced functionality with certain
KVM and power products, such
as StarTech.com’s Remote Power
Switch (PCM8155HNA). These
can be left at their default values if you are not connecting the unit to a
KVM or power management device.
SNMP
The SNMP menu allows you to configure the SV441DUS-
BI so it can be recognized and managed using industry
standard Simple Network Management Protocol software.
RADIUS
The RADIUS server requires the IP address, the UDP
port number (1812 - default or 1645)
and the shared secret. The shared
secret is used to encrypt com-
munications and corresponds to a
shared password for the RADIUS
server and the client machine. Two
additional servers may be defined
for backup purposes. Each server
will be tried in order using the
indicated number of retries and
timeout period, which are configu-
rable on the same page.
Remember to enable RADIUS after configuring it. While RADIUS authen-
tication is enabled, the locally defined accounts on the Server Remote
Control unit will not be used, except for the SSH login. However, if a user
name in the form “name.local” is given at the RADIUS prompt, the system
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will use “name,” check the password locally, and skip RADIUS authentica-
tion. Delete all local accounts to avoid this behavior. When connecting via
VNC, a login screen is generated that asks for a RADIUS username and
password.
Modem
Enable this to allow the modem to answer the
phone and start a PPP connection. Enable
modem connections (PPP) via serial port/
modem.
Serial Ports
The Serial Ports menu allows you to
manage and connect to devices con-
nected to the unit using the R-Port on
the SV441DUSBI.
Time / Date
Date and time are stored without consideration
for time zone. If you are controlling multiple sites
in different time zones, we recommend you use
UTC (Universal Coordinated Time, also sometimes
called GMT or Zulu) for all machines.
If the computer you are using to view this page
knows the correct time, just press the button to set the time and date to
that of your browser.
Firmware
The firmware on the Server Remote Control is field upgradeable. To
upgrade to another version:
1. Login your IPKVM as “admin”
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2. Click “Firmware”
3. Click “Get latest version”
4. Click http://18235253.net/......
5. Save the latest firmware file to your computer. It will
take a few minutes for downloading, depends on the
speed of your network.
6. Upload the latest firmware file from your computer to
the IPKVM. It will take more than 5 minutes for uploading
and writing it to the flash memory of the SV441DUSBI.
Auto Self Upgrade: The SV441DUSBI unit includes an
innovative feature allowing it to upgrade itself over the internet. Simply
click on the button labeled Upgrade to Latest and the unit will use the
internet to download the latest version of the system firmware and then
install it.
If it cannot access the Internet directly (perhaps due to a web proxy or
other firewalls), then a page will be shown that prompts your browser to
download the required file. Save this file to disk and then manually upload
it as described in the next section.
Purchase Options
Certain firmware features may be offered separately from the base unit, in
order to reduce the initial cost for the Server Remote Control unit.
NOTE: If you wish to upgrade after the system is in operation, go to the
Manage Firmware page and scroll down to the section entitled Purchase
Options. Look for a unique code, such as: 4-C80C-B960-1-0. If you
provide this code to the technical support department, they can give you
an unlock code that will open any feature you request. Type the provided
code into the area provided and click Submit. The new features opened
by the code will be enabled immediately, but you may need to reboot the
unit to begin using certain features.
Manual Upload: Enter the name of the firmware file that you downloaded
from StarTech.com into the field provided (or use the Browse... button).
Press Start Upload and wait until a successful upload message is shown.
NOTE: Remember the following during the firmware upgrade:
• Do NOT turn off power to unit before this operation completes
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successfully.
• The unit will sometimes reboot as part of the upgrade procedure,
depending on which system component is being upgraded.You will
have to reconnect and re-login in those cases.
• Wait at least two minutes after pressing Start. Do not assume the
upload did not work, the upload could simply be slow.
• Each distributed file upgrades a different component of the system.
Be sure to apply all files provided as part of an upgrade. The system
knows what to do with each file you give it, and they are checked for
validity before being applied.
Auto Self Upgrade: Clicking the Upgrade to latest button will automati-
cally download and install necessary revisions. To download upgrades for
manual installation, please click on Get latest version.
Status
The Status screen displays a system security
log, various system settings, and the ability to
generate a copy of the system configuration in
plain text format.
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Port Numbers
Port Numbers provides a table allow-
ing you to change TCP port values for
services available on the SV441DUSBI.
By default, they are factory-set to com-
mon Internet values.You may wish to
enhance security by disabling services
that you will not use with the unit. To dis-
able a service, change its port number
to 0. When you have made any neces-
sary changes, click Commit changes
to use the settings the next time the SV441DUSBI restarts. To force the
unit to restart immediately, click Restart Servers.
Help Menu
Provides a FAQ (Frequently Asked Questions) listing to assist you with
the features and operation of the SV441DUSBI.
Site Map Menu
This menu provides a directory of each setting available on the Web
configurator.
Copyright Menu
Provides the Terms of Use and other information related to the firmware
and software on the SV441DUSBI.
Using the Terminal Interface via Serial Port
The terminal interface can be accessed via the serial port for configura-
tion of the basic settings of the SV441DUSBI. While not intended to be a
substitute for the Web interface, it does allow you to configure some of the
same functions. The menu list below describes the options that can be
modified through the terminal interface.
Note that you must use the W option to confirm and apply any changes
made before you exit the terminal session.
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Accessing the VNC Interface
There are three ways to communicate with the Server Remote Control
unit in order to control the host computer:
• Web interface: The integrated Web server includes a Java-based VNC
client. This allows easy browser-based remote control.
• Native VNC client: There are several third-party software programs
that use the standard VNC protocol, available in open source and
commercial VNC clients.
• SSH access: By default, there is a standard SSH server running on
port 22 (the standard SSH port). Once connected via SSH, the VNC
traffic is tunneled through the SSH connection and encrypts the VNC
session. Each method will be discussed briefly in the following section.
The type of encryption method or client used is not critical.
Web Interface
Using SV441DUSBI’s web interface requires a browser, with cookies
and JavaScript enabled. To start the Java VNC client, login to the Web
configuration interface and click on the thumbnail of the desktop on the
Home menu, or click on the Connect button, located in the Main Menu.
You may need to upgrade Java support in your browser; however, most
modern browsers come with a version of Java that is compatible with this
application. The Java VNC client makes a connection back to the Server
Remote Control unit over port 5900 (by default) or 15900, if encrypted.
The encrypted connection is a standard SSL (Secure Socket Layer)
encrypted link that encrypts all data from the session, including the actual
video pictures.
Because Java is considered a “safe” programming language, the Java
VNC client has some limitations. Certain special keystrokes cannot be
sent, such as “Scroll Lock” on the keyboard.
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This client software requires the use of Java 2 (JRE 1.4) to enable
features like wheel mouse support. Sun Microsystems’s Java site, www.
java.com, is an excellent resource to ensure your browser and operating
system are updated accordingly.
Native VNC Client
This system implements the VNC protocol, so any off-the-shelf VNC
client can be used. There are over 17 different VNC clients available and
they should all work with this system. This system automatically detects
and makes use of certain extensions to the basic RFB protocol that is
provided by the better VNC clients.
available for Windows, Linux, MacOS and many versions of Unix. Source
code for all clients is available there too. This version of VNC is being
actively developed. The authoritative version of VNC is available from
of VNC, maintained by the original developers of the standard. For a
commercial, supported version of VNC, you should consider TridiaVNC
contains a number of enhancements for use in a larger corporate environ-
ment.
NOTE: Some native VNC clients may require a flag or setting indicating
they should use BGR233 encoding by default. If this flag is not set, you
may see a garbled picture and the client will fail. The Unix versions of
VNC require the flag -bgr233. For examples on using this flag, review the
commands in the following section.
SSH Tunnel (with Native VNC client)
If you are using openssh, here is the appropriate Unix command to use,
based on the default settings on a machine at 10.0.0.34:
ssh -f -l admin -L 15900:127.0.0.1:5900 10.0.0.34 sleep 60
vncviewer -bgr233 127.0.0.1::15900
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Notes:
• A copy of these commands, with appropriate values filled in for your
current system setting, is provided in the on-line help page. This allows
you to “cut-and-paste” the required commands accordingly.
• You have 60 seconds to type the second command before the SSH
connection will be terminated.
• The port number “15900” is arbitrary in the above example and can
be any number (1025...65535). It is the port number used on your
client machine to connect your local SSH instance with the VNC
client. If you want to tunnel two or more systems, you will need to use a
unique number for each instance on the same SSH client machine.
• Some Unix versions of the VNC client have integrated SSH tunneling
support. Some clients require your local user id to be the same as the
userid on the system.
Use a command like this: vncviewer -bgr233 -tunnel 10.0.0.34:22
Using the VNC Menu
One of the unique features of this product
is the VNC menu system. Whenever you
see a window with a dark blue background
and grey edges, this window has been
inserted into the VNC data stream so that
it is effectively laid over the existing video.
These menus allow you to control the many
features of the SV441DUSBI without using
the web interface or a custom client.
When you initially connect to the system,
a Welcome Window will appear indicating
which system you are controlling, what encryption algorithm was used,
and what key strength is currently in effect. Click anywhere inside the
window to clear it, or wait ten seconds.
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Bribar Feature
Along the bottom of the VNC screen is a dark blue bar with various but-
tons known as the Bribar. Its purpose is to show a number of critical sta-
tus values and to provide shortcuts to commonly used features. Here is a
snapshot of what it may look like. There will be slight differences based on
optional features and system configuration. Starting from the left side of
the Bribar, each feature and its function is outlined below.
Bandwidth: Indicates current average bandwidth coming out of the
Server Remote Control unit. The second number measures round trip
time (RTT) of the connection when it was first established.
Resync: Re-aligns the remote and local mouse points so they are on top
of each other.
Redraw: Redraws the entire screen contents; occurs immediately.
÷4, ÷8: Switches to thumbnail mode, at indicated size (i.e. 1/4,1/8 )
Ctrl-Alt-Del: Sends this key sequence to the host.Works immediately.
Alt-F4: Sends the key sequence to host (closes windows).
KVM: Sends the KVM “hotkey” sequence. This function is only enabled
when you have configured the unit to expect a particular brand of KVM
downstream. It sends the key sequence to launch the KVM’s on-screen
display (OSD) menu. This button is only present when a KVM model is
selected in the Web interface.
Menu: Shows the main menu.
Video: Shows the video-tuning menu where the picture quality can be
adjusted.
Keys: Shows the VirtKeys menu, which allows you to simulate pressing
special keys such as the Windows key or complex multi-key sequences.
[1][A][S]: These flags show the state of the keyboard lights, NumLock,
ShiftLock and ScrollLock respectively.
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X: Click this button to close the Bribar and hide it. This can be very useful
on a client machine that has a screen size the same as the remote ma-
chine. No vertical screen space is wasted with the Bribar. Use double-F7
to start the main menu, then click on the Bribar to restore the feature.
Other items: If the server’s screen is larger than 1024x768, additional
buttons will be shown to the right of the above listed items. These are all
keyboard shortcuts and are duplicated in the Keys menu.
Main Menu
To access the main menu, quickly press F7 twice.You must press the key
twice within one second. If you press it once or too slowly, then the F7
key(s) are sent to the host, just like any other key. This is the only way to
get into the menu system, if the Bribar is disabled. Here is the main menu
for a typical system:
The main menu window may be moved by clicking and dragging on the
title bar. It can be closed by pressing Escape, or by clicking on the red
X in the top right corner. Here is a guide outlining various fields from the
Main Menu. Most of the functions operate immediately. Other functions
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require a response to a confirmation prompt first before performing the
requested function.
• Identification: Fixed text label that is defined by the user in the Web
interface. This does not affect the operation of the system and is
intended to assist with administration.
• Status: Current status of the attached system and the status of the
unit.
• B/W Min/Avg/Max/Auto: Bandwidth control, wherein current
operation will be indicated with white highlighting. If you choose Min/
Avg/Max then you will override the default, Auto. As the automatic
mode measures actual network performance, you may see the
current mode switch from Min up to Avg or Max. The different modes
indicate more time spent on compression versus more bandwidth.
There is no visual difference between the modes, but there can be a
noticeable difference in speed and smoothness.
• Mouse Resync: Resynchronizes the mouse pointer so that the local
and remote mouse pointers are on top of each other.
• Take Control: When multiple users are connected to the same system,
use this button to take control away from another user. Only one user
may control the keyboard and mouse at any time. All users see the
same picture.
• Thumbnails: Switch to smaller thumbnail size screen images (click
anywhere on thumbnail to restore it). Each button corresponds to a
different sized image, from half size to one-sixteenth.
• Logout: End the VNC login session and disconnect.
• Video Tuning: Sub-menu with video adjustments, to be used when
automatic picture adjustment does not provide a good quality picture.
• VirtKeys: Virtual keyboard provides a menu with special keys that are
often hard to generate but needed by the remote system. The most
common key sequence is the [Ctrl] – [Alt] – [Del].
• KVM Menu: Generates the key sequence used to access the on-
screen menu for an enterprise-class KVM switch. When these
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conventional KVM switches are combined with the SV441DUSBI, this
key makes accessing their built-in menu easier, especially from the
Java client. This button will only be shown when an external KVM has
been enabled via the web interface.
• Bribar: Closes or reopens the Bribar window along the bottom of the
screen.
VirtKeys Menu
Clicking any button in the top half of the window simulates pressing and
releasing the indicated key. In the bottom area of the screen, clicking will
simulate the indicated Meta key being pressed.You may then click in the
top part to send another key and release the Meta key at the same time.
Alternatively, you may move the mouse outside this window, press the
regular key, and then choose -RESET- to release all depressed keys. The
VirtKeys menu can be left open while using the host system.You can then
click the required button at the suitable time, and still interact with the host
in a normal fashion.
Examples:
• [Ctrl]-[Alt]-[F4]: Use L-Ctrl then L-Alt in the Toggles area. Then click
F4.
• To bring up the Start menu under Windows: Click the L-Windows
button at the top left of the above window.
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Video Tuning menu
Use the Auto Everything button to automatically fine-tune all three ad-
justments. If the test pattern for Color Offset calibration is not present on
the screen, then the Color Offset adjustment is skipped.
Changes/frame indicates the number of 16x16 blocks of video that are
being sent, on average, for every frame of video. With a static image
being displayed by the server, this number will be zero (shown as -nil-).
Moving the mouse, for example, will cause the number to jump to about
2 or 3.You may use this number to judge the picture quality as you adjust
the controls on this menu.
Picture Positioning affects the image position on your screen. If you see
a black line on either side of your screen, or at the top or bottom, you can
use the arrow buttons to shift the image in that direction. Pressing Auto
does the same thing for you automatically. Use Save to save the changes
you have made manually. Since this adjustment depends on the video
mode, separate values are stored for each video mode.
Color Offset is a fine tuning adjustment that requires the use of a test
pattern. There is a copy of the test pattern available on the Help! menu of
the integrated web server.You must arrange for that image to be shown
on the host computer. Do not allow scaling, cropping or any other chang-
es to that image. Press the Auto button and the system will calibrate color
for the best possible picture in approximately one minute. If the system
cannot find the test pattern on the screen, it will say so. Check that the
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pattern isn’t scaled or covered up. It’s important to do this operation in
24-bit or 32-bit color video mode (i.e. truecolor). Although the algorithm
may work in 16-bit or 8-bit color video modes, the results will not be opti-
mum and usually it won’t be able to recognize the test pattern.
Pressing the Advanced button will open the Advanced Video Tuning
menu. While the vast majority of users will not need to adjust these set-
tings, it offers added control of the video settings of your VNC sessions.
Sampling Phase does not normally need to be used since the SV-
441DUSBI tunes the sampling phase whenever the video mode changes.
This button does not require a test pattern, but will perform optimally
when used with our standard test pattern. For your reference, the sam-
pling phase number is shown to the right of the Filtering button.
Noise Filter controls the advanced video filtering of our system. Unlike
other filtering algorithms, our noise filter will only remove noise. It does
not degrade the signal quality or readability of small text.You may turn it
on and off using the indicated button, or set it to other values using the
arrows. Higher numbers cause more filtering and may cause artifacts
when moving windows. The most common visual artifact is a vertical line
dropping when moving windows horizontally.You may use the Redraw
button to correct these, or use a lower filter number. At minimum, these
values must be greater than two.
Accessing KVM Features
Once you can access and configure the networking component of the
Server Remote Control, you can use it to select and control the managed
computers connected to it. This section describes how to use the on-
screen display (OSD) system to manage your computers. Once you have
established a VNC session with the SV441DUSBI, you can access the
KVM features as though you were at a local console.
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OSD Operations
By hitting the left <CTRL> key twice within two seconds, you may see
the ‘Hotkey Menu’ if it is enabled (an OSD option). Or, by hitting the left
<CTRL> key three times within two seconds, you will see a KVM MENU
screen showing a list of the computers with corresponding channel ad-
dresses, names and status.
• The port number (or channel address) of the currently selected
computer is displayed in red in the top right of the screen.
• The device name is green if the device has power and is ready for
selection or white if it has no power. The OSD menu automatically
updates the color when it is activated.
• Use the <UP> and <DOWN> arrow keys to highlight a computer and
the <ENTER> key to select it.
• Press <ESCAPE> to exit the OSD menu and remove the OSD menu
from the screen.
• An eye mark on the right side of the screen indicates that the computer
has been selected to be monitored in Scan mode.You can switch this
mark on and off using function key <F2>.
• Press <ESCAPE> to exit the OSD and to return to using the selected
computer. The computer name is shown on the screen.
OSD Function Keys
You can use the function keys when the OSD menu is active.
Function key <F1>
Edits the name of a managed computer or a Slave KVM. First, use the
<UP> and <DOWN> arrow keys to highlight a channel then press <F1>
followed by name entry. Each name can be up to 14 characters long. Valid
characters are A to Z, 0 to 9, and the dash character. Lowercase letters
are converted to uppercase. Press <BACKSPACE> to delete a letter one
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at a time. Nonvolatile memory stores all name entries until you change,
even if the unit is powered down.
Function key <F2>
Marks a computer to be scanned by switching the eye mark on or off.
First, use the <UP> and <DOWN> arrow keys to highlight the device, then
press <F2> to switch its eye mark on or off. If Scan Type is Ready PC +
Eye (see Function key <F4>), only the powered and eye-marked comput-
ers will be displayed in Scan mode.
Function key <F3>
Locks a device (a computer or a Slave) from unauthorized access. To
lock a device, use the <UP> and <DOWN> arrow keys to highlight it,
then press <F3>. Now, enter up to 4 characters (A to Z, 0 to 9, dash)
followed by <ENTER> as new password. A Security enabled device is
marked with a lock beside its channel number. To permanently disable the
security function from a locked device, highlight it, press <F3> then enter
the password. If you want to access the locked device temporarily, simply
highlight it and press <ENTER>. Enter the password and you can access
the device. The device is automatically re-locked once you switch to an-
other device. During Scan mode, OSD skips the security-enabled device.
Function key <F4>
More functions are available by hitting <F4>. A new screen pops up
displaying the functions described below. Most of them are marked with a
triangle indicating there are options to choose from. Using the <UP> and
<DOWN> arrow keys, select the function and press <ENTER>.
Available options will be shown in the middle of the screen. To select an
option, use the <UP> and <DOWN> arrow keys then press <ENTER> to
select the options.You can press <ESCAPE> to exit at any time.
Auto Scan
In this mode, the KVM automatically switches from one powered com-
puter to the next sequentially in a fixed interval. During Auto Scan mode,
the OSD displays the name of the selected computer. When Auto Scan
detects any keyboard or mouse activity, it suspends the scanning until ac-
tivity stops; it then resumes with the next computer in sequence. To abort
Auto Scan mode, press the left <CTRL> twice. Scan Type and Scan Rate
set the scan pattern. Scan Type (<F4>: More\Scan Type) determines if
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scanned computers must also be eye mark selected. Scan Rate (<F4>:
More\Scan Rate) sets the display interval when a computer is selected
before selecting the next one.
Manual Scan
Scans through powered computers using keyboard control. Scan Type
(<F4>: More\Scan Type) determines if scanned computers must also
be eye mark selected. Press the up arrow key to select the previous
computer and the down arrow key to select the next computer. Press any
other key to abort the Manual Scan mode.
Scan Type
Ready PC + Eye: In Scan mode, scans through only powered computers
that are eyemarked selected.
Ready PC: In Scan mode, scans through all powered computers. The
non-volatile memory stores the Scan Type setting.
Eye Only: In Scan mode, scans only computers that have been eye-
marked.
Scan Rate
Sets the duration of a computer displayed in Auto Scan mode. The op-
tions are 3 seconds, 8 seconds, 15 seconds and 30 seconds. The Scan
Rate setting is stored in non-volatile memory.
Hotkey Menu
When you hit the left <CTRL> key twice within two seconds, the Hotkey
Menu appears displaying a list of hot-key commands if the option is On.
The Hotkey Menu can be turned Off, if you prefer not to see it when the
left <CTRL> key is hit twice. The non-volatile memory stores the Hotkey
Menu setting.
CH Display
Auto Off: After you select a computer, the channel address and name
of the computer will appear on the screen for 3 seconds then disappear
automatically.
Always On: The channel address and name of a selected computer
and/or OSD status displayed on the screen all the time. The non-volatile
memory stores the CH Display setting.
Position
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You can choose where the selected computer name and/or OSD status
is displayed on your screen during operation. The actual display position
shifts due to different VGA resolutions: the higher the resolution the higher
the display position. The non-volatile memory stores the Position setting.
UL as Upper Left UR as Upper Right
LL as Lower Left
LR as Lower Right
MI as Middle
ESC: To exit the OSD, press the <ESCAPE> key
Hot Key Commands
A hot key command is a short keyboard sequence to select a computer,
activate a computer scan, etc. A hot-key sequence starts with two Left
Control keystrokes followed by one or two more keystrokes.
The short form hot-key menu can be turned on as an OSD function
(<F4>: More\Hotkey Menu) every time the left <CTRL> key is pressed
twice.
Left Ctrl refers to the <CTRL> key located at the left side of the keyboard.
1~8/A~H refer to the number keys 1 to 8 at the upper row of the keyboard
(Do not use the keypad at the right of the keyboard) and character keys A
to H (case insensitive).
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Selecting a Computer
To select a computer by hot-key command you need to know the device’s
channel address, which is determined by the KVM connection. For a
computer connected to the switch, the address is represented by the PC
port number (1~4). For example, to access the PC plugged into port 4 of
the Master KVM switch, type: left Ctrl + left Ctrl + 4.
Auto Scan
Auto Scan automatically scans through powered computers at a fixed
interval:
left Ctrl + left Ctrl + F1.
When Auto Scan detects any keyboard or mouse activity, it suspends the
scanning until activity stops; it then resumes with the next computer in
sequence. The length of the Auto Scan interval (Scan Rate) is adjustable
(see Scan Rate on the following page). To abort the Auto Scan mode,
press the left Ctrl key twice.
Manual Scan
Manual Scan enables you to manually switch back and forth between
powered computers:
left Ctrl + left Ctrl + F2
Press the up or down arrow to select the previous or next computer in
sequence. Press any other key to abort the Manual Scan.
NOTE: The Scan Type setting will determine whether computers must be
eye-marked to be included in the scan.
Scan Rate
Scan Rate sets the duration between switching to the next computer in
Auto Scan mode:
left Ctrl + left Ctrl + F3
The unit switches between scan intervals of 3, 8, 15 and 30 seconds.
Changing Your Configuration
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After the initial power up, any device (either a KVM or a PC) can be add-
ed or removed from any PC x port on the KVM without having to power
down the Master KVM Switch. Make sure that devices are turned offer
before connecting them to the Master KVM switch. Note: After changing
your configuration, the OSD will automatically update to reflect the new
configuration.
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Optimizing video performance
Choose the best video mode
• We recommend using 60Hz refresh rate and 1024x768 resolution.
Using a smaller resolution like this allows you to fit multiple windows
on your remote desktop. Higher refresh rates stress the video card’s
quality and do not provide any additional information or benefit.
Noisy video cards
• A digital KVM works by converting the analog video signals emitted
by your video card into digital data. If there is noise on that signal, then
it must also be digitized and sent over the network. Quality video cards,
in our experience, offer better performance simply because they don’t
add analog noise.
• Some external KVM switches generate video noise as well. Try to keep
cables short, in order to reduce this effect.
• Enable the Noise Filter option (on the Video Tuning menu) to mitigate
noise issues.
Network performance
• The SV441DUSBI will always send as much data as it can, given
what’s happening on the screen and the actual network performance.
When nothing is changing on the video screen, zero bytes are sent
over the network. If the whole screen is changing, then the unit will
send as much data as your network connection and VNC client allow.
• Network latency, which is the total time it takes for a packet to get to
the SV441DUSBI and come back, has the biggest impact on perceived
performance and usability. Network bandwidth has a lesser effect,
particularly when just moving the mouse around. Only a few bytes
need to be sent when the mouse is moving (and nothing else is
changing on the screen), but the round-trip-time limits the hand-eye
coordination of the user if it is too great. Both actual bandwidth and
measured network latency are shown in the Main Menu.
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Using the Advanced Video Tuning Feature
The Advanced Video Tuning menu allows you to adjust the qualities
of the video in your VNC sessions, and can be accessed by clicking the
Advanced button on the Video Tuning VNC menu. While many users
will probably allow the SV441DUSBI to automatically configure the video
properties, you can use this menu to exercise a great deal of control over
the settings if you wish.
The Presets section contains up to sixteen different settings, plus the
factory setting. If a number is highlighted, then that preset has been
programmed with valid settings and may be used. Note that the Factory
preset is always available. Simply click on the appropriate button and
those settings will be restored.
To save settings to a preset, click on the Save->Preset button in the
Actions pane. The preset buttons will highlight. Click the desired preset
button to save the values. Note that any previous settings assigned to that
button will be lost. If you do not wish to save the presets after clicking the
Save->Preset button, click the Save->Preset button a second time and
the save function will be canceled.
The section of the screen marked Current Values indicates the various
video parameters that can be adjusted. For each parameter, there are
a series of buttons: [, <<, -, Auto, +, >, ]. The ’[’ and ’]’ buttons set the
parameter to its smallest or largest values, respectively. The ’<<’ and ’>>’
buttons decrease or increase the parameter by a large amount. In the
case of phase, this is 4 units. For all the others, this is 10 units. The ’-’ and
’+’ buttons decrease or increase the parameter by one unit. The middle
button sets the parameter to the middle value. The text of the middle
button also indicates which parameter is being controlled. Note that in the
case of phase, the middle button invokes the auto-phase algorithm.
The Performance section of the screen gives an indication of the quality
of the video. Changes/frame is the average number of tiles that change
for each frame sampled by the hardware. Flatness is an indication of
what percentage of the screen contains tiles that are comprised of only
one color.
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The Regrab Screen button in the Actions section causes the screen to
be re-captured. When making small changes to the video parameters,
sometimes these changes are not reflected in the displayed screen imme-
diately, particularly if the noise filter is enabled. Press this button to see
the immediate effect of the changes.
Use the Show Diffs button to learn which parts of the screen are being
sent over the Internet. When you click this button, the screen is cleared to
a medium grey color. All blocks that are sent from that point on will show
up on the screen as they are sent. Click the button again to reset the
screen to grey. To return to normal operation, click the Regrab button. It
is very easy to visually identify the effect noise has on signal processing,
using this feature.
The Auto Offset & Gain button in the Actions section invokes the auto-
matic algorithm for setting the video parameters. The algorithm requires
the factory calibration test pattern to be correctly displayed on the screen.
Using the Modem feature
Background
The modem feature allows the SV441DUSBI to act as an Internet con-
nection server for increased security and flexibility in connecting with
the host computer. Unlike the TCP/IP connection used with the standard
Web configuration and VNC clients, the modem creates a one-to-one
connection between the SV441DUSBI and the computer you are using to
manage the host computer that is essentially private, as it bypasses the
public Internet completely. Note: this feature requires both an external
modem (most standard connection protocols are supported) and a
dedicated phone line that can be connected to the modem for external
access. While it is possible to use the modem feature through some PBX
systems, this increases the complexity and reduces the performance of
the connection. For clarity, the instructions presented here assume that
the modem is connected to a typical POTS (plain old telephone system)
line that is not routed through a phone management system or shared
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with other devices. If you wish to use this feature through a PBX system,
it may require some experimentation and additional support from your
telecom services provider, and is not supported by StarTech.com.
Connecting a Modem
Modem Connection
The SV441DUSBI will work with virtually any Hayes-compatible modem
that recognizes the standard AT command set. Some modem manu-
facturers offer “enterprise” grade modem products (at a premium price)
that include technology to improve the stability of connections; whether
this type of product would be beneficial to your application depends on
whether you consider the modem connection to be mission-critical, the
quality of your telecom infrastructure, and your budget for implementing
this solution. The model of modem attached is essentially transparent to
the SV441DUSBI.
It is important to note that modems that offer “56K” (or 57,000 bps) con-
nections often achieve connection speeds that are far lower than their
maximum capabilities. Given the limitations of telecom infrastructure
(many locations have yet to implement fully digital switching technol-
ogy, and still rely on older analog technology for some segments), the
maximum “upstream” transfer rate is limited to a maximum of 33,600 bps
between two modems; the “downstream” rate is often within a similar
range for a typical connection. Therefore, speeds below 57,000 bps do
not indicate a problem with the modem or the SV441DUSBI, but simply
reflect the line conditions at the time the connection is made. The Serial
port can be used for serial port configuration when the modem is con-
nected. It requires the use of a null modem serial cable.
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Place the modem near the SV441DUSBI and an available telephone jack.
Connect the modem to the telephone jack, data cable, and power source
according to the instructions in its documentation. The opposite end of the
modem’s data cable should be a DB9 female serial connection. Connect
that end of the cable to the Serial connection on the rear panel of the
SV441DUSBI.
Modem configuration
Although most connections will work appropriately with the default set-
tings on SV441DUSBI, manual changes can be made. To do so:
Login to the Web interface as Admin. Click Modem, listed on the left side
of the main page.You will then be presented with the Modem Option
menu (see above). Make the following changes to enable and configure
the modem connection.
• Enable modem connections (PPP) via serial port/modem: select
Enabled.
• Baud rate to use (affects connection between us and the modem
only): select 115200.
• Init string: leave as ATE0S0=1&K3 (see below).
The baud rate dictates the connection speed between the SV441DUSBI’s
serial port and the modem, and does not affect the connection speed
between the local and remote modems, as they will negotiate their own
connection speed when a connection is made. It is highly recommended
that this setting be left at the default for best performance.
The initialization (“init”) string is the command (using the standardized
Hayes AT command set) that the SV441DUSBI will send to the modem to
activate it. The string included should work with the majority of modems
and configures the following connection properties: answer incoming
calls on the first ring, enable hardware flow control, and lock the connec-
tion speed.Your modem’s documentation will describe other potential init
strings that you can use to alter the connection properties. For instance,
you could commit the settings to the modem’s non-volatile memory
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(NVRAM) or allow the modem to adjust the connection speed for greater
stability (and so on).You may wish to test the connection with the default
init string first, before making changes specific to your modem model or
situation, to simplify the troubleshooting process.
Click the Commit button to save your changes and activate the modem
feature with the specified settings.
Configuring the Remote Connection
This section describes how to configure a typical Windows dial-up
session to access the modem connection on the SV441DUSBI. The
instructions here relate to a Windows XP configuration; other versions of
Windows are similar.
1. Open My Network Places from the desktop or the Start menu.
2. Click View network connections.
3. Click Create a new connection under Network Tasks.
4. The New Connection Wizard window will open. Click Next.
5. Select Connect to the Internet and click Next.
6. Select Set up my connection manually and click Next.
7. Select Connect using a dial-up modem and click Next.
8. In the space provided under ISP Name, type an appropriate name of
your choosing for the connection. Click Next.
9. In the space provided under Phone Number enter the phone number
for the line to which the SV441DUSBI’s modem is connected.You may
need to add the area code, country code, or other digits needed to
access the outside line as appropriate. When finished, click Next.
10. Make your choice from Anyone’s use or My use only and click
Next.
Beside Username enter the username of any valid user created
using the Web interface of the SV441DUSBI. Beside Password and
Confirm password enter the password that the user you entered
above uses to access the Web interface.
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11. This screen also includes 3 checkboxes. Uncheck all 3
checkboxes.
12. Click Next.
13. You may select to add a shortcut to the desktop for this connection.
Click Finish.
• PPP (Point-to-Point Protocol) must be used; no other authentication
methods are supported.
• TCP/IP must be installed/enabled on the computer making the
connection, and must be used for the dial-up connection.
• The connection must be configured to obtain a dynamic IP address.
• The user name/password must match a user currently configured on
the SV441DUSBI.
• For best performance and to simplify the troubleshooting process,
firewall software should not be used with the dial-up connection.
Accessing the Web Interface
Once a dial-up connection has been established, you can access the
Web interface or start a VNC session using the following IP address:
You can now login to the Web interface (and/or VNC session) normally.
Note that the remote machine (the one you dialed from) is automatically
assigned the IP address 99.99.99.100 for the PPP session. This, and the
IP address of the SV441DUSBI, cannot be modified. The following TCP/
IP port numbers are assigned for a PPP connection, regardless of the
settings configured in the Web interface for the LAN or WAN ports:
HTTPS: 443
VNC (clear-text): 5900
VNC (SSL secured): 15900
SSH: 22
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Performance Notes
• All images over the PPP connection will be grayscale to conserve
bandwidth. If other users are connected while a PPP session is active,
their screens will be in grayscale as well. When PPP is inactive, color is
automatically re-enabled.
• Some areas of the screen may not be updated as frequently as others,
and animations or other auto-updating areas of the screen may
appear out-of-focus or “blocky” as a result. Since the area around the
mouse pointer is refreshed most frequently, hold the pointer over an
area to improve its clarity.
• It may be beneficial to minimize any unnecessary icons, backgrounds,
or other clutter on the host computer’s desktop to make the dial-up
connection as efficient as possible.
• If you need to configure the device over a serial connection while the
modem option is enabled, connect a serial cable (see immediately
above for instructions on what type of cable to use for the port you are
accessing on the SV441DUSBI) and begin a terminal session following
the instructions under Terminal Configuration Using a Serial Cable in
this manual. Once connected, you will see the following message:
Expecting a modem, if human, type admin password
(Or start PPP)
Type the password for user admin and press Enter. The password will
not appear on the screen. The configuration menu will appear. Make the
changes you wish or press q and Enter to exit and leave the modem con-
nection active.
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Modem Troubleshooting Guide
The following messages will appear in the system log on the Status
screen in the Web interface and may help to diagnose problems with the
modem configuration.
Starting PPP (for auth) on port…
Modem is connecting and the PPP login process is starting.
Modem hang up. Resetting
The connection has been closed or terminated unexpectedly.
Timeout during login process. Giving up
The PPP client connecting over the modem has waited too long to com-
plete the authentication process or supplied an invalid user name and/or
password.
Modem init chat script failed
The modem did not respond to the initialization string from the SV-
441DUSBI.You may need to change the init string or verify the cabling
and modem status.
Modem init okay
The modem has responded appropriately to the init string.
Saw PPP startup from client
A PPP authentication has occurred and a session has started.
Phone line rings
An incoming call has been detected by the modem.
Modem answers: xxxxxxxxx
The connection speed and protocol used for a connection, as reported
by the modem. The exact contents of the message will vary depending
on the modem make and model. Using Optional Serial Remote Control
(R-Port) Modules.
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Serial Remote Control operation
Background
The SV441DUSBI offers a unique way to expand the functionality of the
base product. Using the integrated R-Port on the rear panel, you can
manage up to 16 serial devices using a specialized daisy-chain technol-
ogy. The SV441DUSBI includes integrated control functionality that allows
you to monitor and configure serial devices using the interactive Web
interface. To minimize space and infrastructure requirements, the R-Port
modules use a single cable to carry both power and the data signal. All
configuration settings are stored separately in each attached device in
non-volatile memory so that they will not be lost in the event of a power
outage or disconnection.
Connecting Serial Remote Control Modules
The cable for each serial device is similar to a phone cable and uses an
RJ-14 connector. For the first module, connect the cable to the R-Port
on the rear panel of the SV441DUSBI. Connect the opposite end to the
DATA OUT (or similar) port on the Serial Remote Control unit. Note that
some devices may use an integrated cable, so you will not need to make
a separate connection on the serial device. Once you have added the first
serial device to the SV441DUSBI, you can connect additional modules to
the DATA IN (or similar) port on the previous module in the chain. Once
the cabling is attached, the module becomes active after a 15 second
initialization period. For specific information regarding cabling and status
indicators for a specific serial console, refer to the instructions that came
with the product.
Using the Web Interface
Once you have one or more R-Port serial devices connected, you will
able to configure and manage them through the Web interface.You may
need to modify the default settings on SV441DUSBI to match your vari-
ous R-Port modules’ default configuration. Consult the documentation
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that came with your R-Port module to determine if you need to modify the
default settings to complete the installation. To be able to configure your
RPort modules, you must be logged in as admin. Other users will be able
to view which modules are active but cannot configure them.
Once you are logged in, choose the Admin/Setup option from the menu
at the top of the Home screen in the Web interface. Click External Serial
consoles setup and control.You will be presented with the Serial Con-
soles Attached menu, and a table with the following headings:
#:You can assign a value (1 ~ 99) to each attached serial remote control
module. This does not affect the configuration or operation of the device
in any way, but is simply a means to sort this list for ease of management.
Name/Description: An identifier for the R-Port module. Like the number
assignment, it is for ease of administration only.
Baud (bps): This is the communication speed for the device, and the set-
ting here must match the setting on the module itself. All common baud
rates between 300 and 115,200bps are supported.
Mode: Sets the character framing scheme that the SV441DUSBI will use
with the R-Port module.You can choose from the following selections:
8N1: Eight bits, no parity, one stop bit (default and most common)
7N1/701/7E1/7M1/7S1: Seven bits, (none/odd/even/mark/space) parity,
one stop bit
8N1/801/8E1/8M1/8S1: Eight bits, (none/odd/even/mark/space) parity,
one stop bit
8N2: Eight bits, no parity, two stop bits
Force DCD: Forces the Carrier Detect signal to be active at all times.
Normally, DCD becomes active when a new user connects and is
dropped when the last user disconnects (a response that is similar to
many modems). When active, the device will logout and reset itself if the
carrier signal is lost, increasing security. Note that this may not work with
all devices and could impair proper operation in some circumstances. The
default setting is off.
Console Log: Clicking this link will open a separate Web page that will
display the last 200 characters committed to that device’s console log.
Note that existing data is overwritten automatically when the 200 charac-
ter limit is reached.
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You can make as many changes as needed on this menu at one time,
before applying your changes. Once you are satisfied with the changes
you have made, click Commit changes to apply the new settings. Click
Refresh at any time to see an updated list of attached R-Port modules.
Advanced Configuration Using the Integrated SSH Shell
In most cases, configuring the SV441DUSBI to the same settings as the
R-Port devices you are connecting should allow the devices to work with
a minimum amount of configuration. However, you can also change the
default settings on each R-Port device to fit your preferences and the
needs of your application.
If you click the Connect… button next to the device you want to con-
figure, two new windows will appear. The smaller of the two is a login
screen; the other is an SSH terminal window. Click the login window and
sign in as admin (using the same password as the Web interface) to
activate the terminal window.You will see a welcome banner similar to the
following:
Baud rate: 115200 bps, 8N1
Connected to #1: (none)... (Press Ctrl-Shift-_ for menu).
You are now connected to the R-Port module in a live terminal session.
Commands you type will be echoed on the terminal screen. The module
also offers a simple menu system that allows you to change its configura-
tion settings (similar to the function of the menus in a terminal software
package). Press [Ctrl] - [Shift] – [ _ ] (underscore) on the keyboard to
access the menu. It will be similar to the following:
RS-232 Menu (#1: (none), 115200 bps, 8N1)
Q – Disconnect
# - Send break
H – Hangup line (drop DCD)
E – Send Ctrl-Shift-_
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L – Low log entries (line buffer)
1 – Show last 10 log entries
other – Return to connection
Press key ->
To execute the desired command, simply press the corresponding key on
the keyboard.You can also execute the command and avoid the menu by
pressing the [Ctrl] – [Shift] – [ _ ] key combination quickly and pressing
the letter of the command. To quit the menu, press [Q] on the keyboard
when the menu is active. These commands are not sent to the device you
are managing and relate to the RPORT module itself.
Remote Login via SSH
You can also use a standard SSH client to access the R-Port options if
you wish to avoid using the Java-based SSH client in the Web interface.
Simply use your SSH client (several freeware packages are available for
download, along with commercial applications) and connect to the IP ad-
dress of the SV441DUSBI using port 22 (default).
Log in to the SSH session as admin using the same password as the
Web interface. At the command prompt type connect x (where x is the
number of the R-Port devices you wish to manage). Alternatively, you can
enter the command connect -l to see a list of active devices.
Operating Notes
• If the power supply to the R-Port modules you have connected be
comes faulty (short, overload) then the R-Port LED on the front panel
of the SV441DUSBI will show red. Under normal operations, this light
should remain green. The R-Port connector on the rear panel also has
an LED that mirrors the status of the light on the front panel.
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• Hardware handshaking (CTS/RTS) is required for speeds exceeding
9600 bps. It is enabled by default on the SV441DUSBI, but may need
to be enabled on the other end of the connection. For Unix systems,
the command is:
stty –crtscts < /dev/[serial port]
• A maximum of four users may simultaneously login to the same
module. All users may type commands at any time, and all users will
see the same output. Note the following:
• All users have equal access to all channels.
• A maximum of 16 R-Port modules may be connected at any one
time.
• You plug-in and unplug any R-Port module at any time. When
reconnected, it will automatically become available after a 15
second initialization period. Any log entries will be retained by the
R-Port module while deactivated, but will not be available to users
until it is re-initialized.
About Security Certificate Warnings
What is a security certificate?
Sites that employ secure TCP/IP (Internet) connections include a cer-
tificate that confirms that users are connecting to a legitimate site and
are not being redirected without their knowledge. Certificates are issued
by trusted third parties called Certificate Authorities (CAs) and contain
essential details about a site that must match the information supplied to
your Web browser.
Why do I receive a warning when I access the login screen on the
SV441DUSBI?
As it redirects you to a secure (SSL) session by default, the login screen
may generate a warning from your Web browser or the VNC Java client
for two different reasons. First, the CA that has issued the certificate on
StarTech.com’s behalf may not yet be recognized as a trusted source by
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the computer you are using to access the SV441DUSBI. Second, since
the unit could be configured in a number different ways, it is impossible to
supply a generic certificate that will match your exact network settings.
Is my data safe?
Yes. The security certificate does not affect encryption effectiveness
in any way, nor does it make the SV441DUSBI any more vulnerable to
outside attacks.
Can I prevent the warning from occurring?
Yes.You have two options that may prevent the warning from occurring.
First, if the Web browser you are using offers the option to ignore the
warning for future visits, the browser will no longer generate a warning
if that option is selected. Second, if you install the certificate from the
SV441DUSBI onto the host computer (see below) and if the unit is con-
figured with a domain name ending in .com, .net, .org, .gov, .edu, .us, .ca,
.uk, .jp, or .tw (i.e. remotecontrol.mydomain.net) then the warning should
no longer occur.
Installing the New Certificate
The following instructions detail how to install the certificate from the
SV441DUSBI onto your local computer (in this case, when using Internet
Explorer with Windows XP).
1. Open your Web browser and go to the SV441DUSBI login screen. Click
the Update security certificate link.
2. When prompted, choose Open.
3. A Window will appear that offers information about the certificate. Click
Install Certificate.
4. The Certificate Import Wizard will appear. Select Automatically
select the certificate store… (default) and click Next. When the next
window appears, click Finish.
5. A confirmation dialog will appear asking you if you wish to install the
certificate. Click Yes.
6. A message should appear saying the import was successful. Click OK.
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Troubleshooting
Forgotten master password.
You can reset the master password using the serial interface on the unit.
Use the S command, and type a new password. The old password is not
required for this procedure.
Remote mouse and local mouse don’t line up.
Use the Mouse resync command in the main menu or press the Resync
button on the Bribar. If the mouse pointers still don’t line up, verify that
mouse acceleration has been disabled.
NOTE: The Windows login screen does not accept the “mouse accelera-
tion” configuration, and always has the mouse accelerated regardless of
your configuration. Therefore, on this screen it is best to avoid using the
mouse.
After resync, the mouse pointers are still not aligned.
Use the video adjust menu to position your video image exactly where
it should be. Normally a slight video positioning error is perceived as a
mouse sync issue. A video positioning error is visible as a black line along
the top or bottom (and right or left) edges of the remote screen. Remem-
ber to save your position changes!
Cannot login via SSH.
Remember to use either admin or a username created in the system as
the user name you give your SSH client.
If you see a warning about identity of host cannot be verified, and a
question about saving the host’s fingerprint, this is normal for the first time
you connect to any machine running SSH.You should answer yes so that
your SSH client saves the public key of this host and doesn’t re-issue this
warning.
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Certificate warning shown when connecting via HTTPS.
It is normal for a warning dialog to be shown when connecting via HTTPS.
The SSL certificate S uses is created when the unit is first produced. It
does not contain the correct hostname (subject name) because you can
change the hostname as required. Also, it is not signed by a recognized
certificate authority (CA) but is signed by our own signing authority.
Mouse performance is erratic when using the GNOME or KDE desk-
top in a Linux X-Window environment.
The mouse controls in GNOME and KDE environments offer both an
acceleration and sensitivity setting. The following directions correct this
issue, and apply to Red Hat Fedora Core 2, but should be similar for other
distributions that use GNOME or KDE:
1. Click the Launch menu icon.
2. Choose Preferences > Mouse.
3. Click the Motion tab.
4. Set the Acceleration bar to the setting immediately left of center.
5. Set the Sensitivity bar to the leftmost settings (lowest possible).
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Specifications
General Specifications
Maximum Supported 1600 x 1200 @ 85Hz
Video Mode
640x400 @ 85Hz
720x400 @ 85Hz
640x480 @ 60Hz, 72Hz, 75Hz, 85Hz
800x600 @ 56Hz, 60Hz, 72Hz, 75Hz, 85Hz
1024x768 @ 60Hz, 70Hz, 75Hz, 85Hz
1152x864 @ 75Hz
Standard Video
Modes Supported
1280x960 @ 60Hz, 85Hz
1280x1024 @ 60Hz, 75Hz, 85Hz
1600x1200 @ 60Hz, 65Hz, 70Hz, 75Hz, 85Hz
Maximum Power
Consumption
18 Watts (12VDS, 1.5A) Centre Positive
Video In
USB Keyboard
USB Mouse
LAN (RJ45)
R-Port (RJ14)
DB9 RS-232 Male
DC IN
Input Connectors
Regulatory
FCC Class A, CE, ROHS, VCCI
Certifications
• Source code for the unit operating system is available upon request.
Please contact us by phone, live chat, or email to make your request.
This offer is valid for three years from the date of purchase and/or
for as long as parts or customer support is offered for this product.
Charges for the reasonable cost of copying and/or conveying may
apply.
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Supported Protocols
Service
Description
Benefit
May be used to securely “tunnel” VNC and
HTTP protocols.
SSH
Secure Shell
Convenience server to redirect all web
traffic to encrypted port. Clear-text HTTP is
not supported.
Web Redirector
(to HTTPS)
HTTP
SNMP Agent
(UDP)
Allows integration with existing SNMP
network management systems.
SNMP
Secure control and management of the
device and attached system. Screen
snapshots may be downloaded. Integrated
Java VNC client (with or without encryption)
allows control from any Java enabled
browser. Password protected.
SSLTLS
Encrypted Web
Control
HTTPS
Standardized real-time KVM network
protocol. Compatible with existing VNC
client software.
VNC/RFB
Protocol Server
VNC
VNCS
DHCP
VNC protocol tunneled via SSLTLS
encryption. For secure real-time control of
the server over public networks.
SSL-tunneled
VNC
Eases network setup by fetching IP
address and other network settings from a
centralized server.
Dynamic IP
Setup Config
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Service
RADIUS
Description
Benefit
Allows integration with existing RADIUS
servers, so that user management can be
centralized. Supports challenge response
authentication using hardware tokens (like
SecurID) and conventional passwords.
Centralized
authentication
System event
logging to
another system
MIT-LCS UDP protocol. Must be configured
via DHCP option.
SYSLOG
DNS
Converts text name into IP Address Only
used in the URL specification needed to
emulate a CDROM. Use is optional.
Domain Name
Service
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Technical Support
StarTech.com’s lifetime technical support is an integral part of our commit-
ment to provide industry-leading solutions. If you ever need help with your
selection of online tools, documentation, and downloads.
Warranty Information
This product is backed by a one year warranty.
In addition, StarTech.com warrants its products against defects in materi-
als and workmanship for the periods noted, following the initial date of
purchase. During this period, the products may be returned for repair,
or replacement with equivalent products at our discretion. The warranty
covers parts and labor costs only. StarTech.com does not warrant its
products from defects or damages arising from misuse, abuse, alteration,
or normal wear and tear.
Limitation of Liability
In no event shall the liability of StarTech.com Ltd. and StarTech.com USA
LLP (or their officers, directors, employees or agents) for any damages
(whether direct or indirect, special, punitive, incidental, consequential, or
otherwise), loss of profits, loss of business, or any pecuniary loss, arising
out of or related to the use of the product exceed the actual price paid
for the product. Some states do not allow the exclusion or limitation of
incidental or consequential damages. If such laws apply, the limitations or
exclusions contained in this statement may not apply to you.
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StarTech.com has been making “hard-to-find easy” since 1985,
providing high quality solutions to a diverse IT and A/V customer
base that spans many channels, including government, education
and industrial facilities to name just a few. We offer an unmatched
selection of computer parts, cables, A/V products, KVM and Serv-
er Management solutions, serving a worldwide market through our
locations in the United States, Canada, the United Kingdom and
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our products and to access exclusive interactive tools such as the
Cable Finder, Parts Finder and the KVM Reference Guide.
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