iMcV-Gigabit
Operation Manual
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Table of Contents
FCC Radio Frequency Interference Statement ....................................................ii
Warranty............................................................................................................ii
About the iMcV-Gigabit .....................................................................................1
Configuration Instructions ..................................................................................1
LinkLoss, FiberAlert and Link Fault Pass-Through................................................3
Using FiberAlert and LinkLoss.............................................................................4
Link Fault Pass-Through (LFPT)...........................................................................5
Additional Gigabit Features ................................................................................6
Installing an iMcV Module..................................................................................6
LED Operation...................................................................................................7
Installation Troubleshooting ...............................................................................8
Specifications.....................................................................................................9
IMC Networks Technical Support.....................................................................10
Fiber Optic Cleaning Guidelines.......................................................................11
Electrostatic Discharge Precautions...................................................................11
Certifications....................................................................................................12
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About the iMcV-Gigabit
The SNMP manageable iMcV-Gigabit module provides a single conversion between
1000 Base-T twisted pair and 1000 Base-SX/LX fiber. Each iMcV-Gigabit includes
one RJ-45 connector and one pair of SC fiber optic connectors. iMcV-Gigabit
modules install into any modular, SNMP manageable iMediaChassis, as well as the
MediaChassis series, which is unmanaged.
The iMcV-Gigabit is also available in a single-strand fiber version that allows two
wavelengths to share one fiber strand—Full-Duplex data travels on different
wavelengths (1310 nm and 1550 nm)—doubling the capacity of fiber. Also, one RJ-
45 connector and one SC fiber connector are included.
NOTE
All iMcV-Gigabit modules, including 1300 nm multi-mode and 1310 nm single-mode (TX/LX),
850 nm multi-mode fiber (TX/SX) and single-strand versions (TX/SSLX) will be referred to as
iMcV-Gigabit throughout this guide except where differences need to be indicated.
Configuration Instructions
iMcV-Gigabit Modules have user-configurable features. Refer to the matrix for
configuring both managed (via an SNMP compatible management application such as
iView²) and unmanaged iMcV-Gigabit modules.
Managed Modules
To manage one or more iMcV-Gigabit Modules, an SNMP agent must be present in
the chassis: The iMediaChassis series requires an SNMP Management Module. To
configure Managed Modules, install the module first, and then configure using the
management software. Refer to the iView² for MediaConverters online help file for
additional information.
NOTE
If the module is going to be managed via the software management, configuration settings
will override any hardware DIP Switch settings.
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Unmanaged Modules
Before installing, configure the iMcV-Gigabit Module for desired features. The table
below indicates the available features and settings for the module. After configuring
the switch for the desired settings, install the module and connect the appropriate
cables. For further information, refer to the Installing an iMcV Module section.
iMcV-Gigabit w/LFPT
DIP Switch on S1
Feature
Forced/Preferred
Factory use - Do not change
TX LinkLoss
FiberAlert
FX Auto Negotiation
FX LinkLoss
Default Setting
1
2
3
4
5
6
7
8
ON
ON
OFF
OFF
ON
OFF
OFF
OFF
Factory use - Do not change
Factory use - Do not change
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LinkLoss, FiberAlert and Link Fault Pass-Through
iMcV-Gigabit modules include the troubleshooting features FiberAlert, TXLL, FXLL
and LFPT that help locate silent failures on a network. Before attempting to install the
module(s), understand how these features work and react to a specific network
configuration.
** WARNING **
Installing modules without understanding the effects of LinkLoss and FiberAlert can
cause functioning units to appear flawed or even non functional.
Link Integrity
During normal operation, link integrity pulses are transmitted by all point-to-point
Ethernet devices. When an IMC Networks media converter receives valid link pulses,
it knows that the device to which it is connected is up and sending pulses, and that
the copper or fiber cable coming from that device is intact. The appropriate “LNK”
(link) LED is lit to indicate this.
The IMC Networks media converter also sends out link pulses from its copper and
fiber transmitters, but normally has no way of knowing whether the cable to the other
device is intact and the link pulses are reaching the other end. The combination of
FiberAlert and LinkLoss allows this information to be obtained, even when physical
access to a remote device (and its link integrity LED) is not available.
FX LinkLoss (FXLL)
FX LinkLoss is a troubleshooting feature. When a fault occurs on the fiber segment of
a conversation, FX LinkLoss detects the fault and passes this information to the
twisted pair segment. If a media converter is not receiving a fiber link, FX LinkLoss
disables the transmitter on the media converter’s twisted pair port. This results in a
loss of link on the device connected to the twisted pair port.
TX LinkLoss (TXLL)
TX LinkLoss is a troubleshooting feature. When a fault occurs on the twisted pair
segment of a conversion, TX LinkLoss detects the fault and passes this information to
the fiber segment. If a media converter is not receiving a twisted pair link, TX
LinkLoss disables the transmitter on the media converter's fiber port. The result is in a
loss of the link on the device connected to the fiber port.
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FiberAlert (FA)
FiberAlert minimizes the
problems associated with the
loss of one strand of fiber. If a
strand is unavailable, the IMC
Networks device at the
receiver end notes the loss of
link. The device will then stop
transmitting data and the link
signal until a signal or link pulse
is received. The result is that the link LED on BOTH sides of the fiber connection will
go out indicating a fault somewhere in the fiber loop. Using FiberAlert, a local site
administrator is notified of a fault and can quickly determine where a cable fault is
located.
WARNING
Enable FiberAlert on one side of a media conversion only. Enabling it on both
sides would keep both transmitters off indefinitely.
Using FiberAlert and LinkLoss
Modules ship from the factory with troubleshooting features disabled. Refer to the
help file to enable/disable this feature.
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Link Fault Pass-Through (LFPT)
Link Fault Pass-Through (LFPT) is a troubleshooting feature that combines TX and FX
LinkLoss from both the local and remote iMcV-Gigabit modules. LFPT is enabled by
turning on both FX and TX LinkLoss on both modules. This feature allows either end
of the conversion to detect a link fault occurring at the other end of the media
conversion chain. FiberAlert can also be enabled at the main site.
If a cable fault occurs on the remote devices’ twisted pair port, then TX LinkLoss
detects the fault and disable the OPTICS port.
If a cable fault occurs on the remote devices fiber optics’ port, then FX LinkLoss
detects the fiber loss and disables the Twisted Pair port.
The link fault is passed through the media conversion and is observed at each end. It
acts just like it would if the devices were directly connected.
For more information on LinkLoss/FiberAlert, visit the IMC Networks Web site at
http://www.imcnetworks.com/support/ If unsure of how to implement these features
in a specific configuration, contact IMC Networks Technical Support at
(800) 624-1070 (U.S./Canada), +32-16-550880 (Europe) or via e-mail at:
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Additional Gigabit Features
Preferred/Forced Mode
The iMcV-Gigabit module also includes a Preferred/Forced Modes for Master/Slave
negotiation. Preferred Mode helps determine whether the module should act as a
Master or Slave. Forced Mode should typically only be used when connecting to
some legacy switches, or when there is difficulty establishing a link. The default is
Preferred Mode (S1-1 is ON). This feature is hardware configurable only.
Since most switches today typically function
as Masters, IMC Networks recommends
configuring iMcV-Gigabit as indicated in the
table.
DIP Switch
Setting
S1-1
ON (Preferred)
S1-2
ON (Forced)
FX Negotiation on iMcV-Gigabit
The iMcV-Gigabit module include a FX Auto Negotiation feature which negotiates
duplex mode. This feature must be enabled or disabled on both ends of the
connection or there may have difficulty establishing a link. If the device being
connected to the iMcV-Gigabit module does not support Auto Negotiation, disabling
the feature on the iMcV-Gigabit module forces the link up.
DIP Switch settings for FX AN:
DIP Switch
Setting
S1-5
FX AN = ON
Installing an iMcV Module
iMcV Modules install in IMC Networks’ SNMP manageable iMediaChassis series or in
any MediaChassis.
To install an iMcV Module:
1. Remove the blank bracket covering the slot where the module is to be installed
by removing the screws on the outside edges of the bracket.
2. Slide the iMcV Module into the chassis, via the cardguides, until the module is
seated securely in the connector.
3. Secure the module to the chassis by tightening the captive screw.
4. Save any “blanks” removed during installation for future use if the configuration
requirements change.
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AutoCross Feature for Twisted Pair Connection
All twisted pair ports on the iMcV-Gigabit includes AutoCross, a feature that
automatically selects between a crossover workstation and a straight-through
connection depending on the connected device.
LED Operation
Each iMcV-Gigabit Module features diagnostic LEDs that provide information on
features and ports.
iMcV-Gigabit w/LFPT
LNK/
ACT
Glows green when a twisted pair link is established. Blinks
green when data is detected on the port. Located on RJ-45
connector.
FDX
FXLL
Glows amber when port is operating in Full-Duplex Mode
on the RJ-45 connector.
Glows green when FX LinkLoss is enabled on the port.
Blinks when a fault occurs on the fiber port and actively
disables the copper port.
TXLL
Glows green when TX LinkLoss is enabled on the port.
Blinks when a fault occurs on the copper port and actively
disables the fiber port.
LNK
FA
Glows green when a twisted pair link is established.
Glows green when FiberAlert is enabled. Blinks when a
fault occurs on the RCV fiber line and actively disables the
XMT fiber line.
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Installation Troubleshooting
•
During installation, first test the fiber and twisted pair connections with all
troubleshooting features disabled, then enable these features, if desired, just
before final installation. This will reduce the features’ interference with testing.
If using a high powered device (which is designed for long distance installations) for a
short distance installation, the fiber transmitters may overdrive the receivers and
cause data loss. If this is the case, an optical attenuator may need to be added to the
connection.
For fiber specifications, visit the IMC Networks Web site at:
www.imcnetworks.com/adocs/fcs.asp or contact IMC Networks for more information.
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Specifications
Environmental
Operating Temperature
32° - 122° F (0° - 50° C)
Storage Temperature
130° - 158° F (-25° - 85° C)
Humidity
5 - 95% (non-condensing)
Power Consumption (Typical)
iMcV-Gigabit w/LFPT: 0.55Amp
Fiber Optic Specifications
For fiber optic specifications, please visit:
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IMC Networks Technical Support
Tel: (949) 465-3000 or (800) 624-1070 (in the U.S. and Canada);
+32-16-550880 (Europe)
Fax: (949) 465-3020
E-Mail: [email protected]
Web: www.imcnetworks.com
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Fiber Optic Cleaning Guidelines
Fiber Optic transmitters and receivers are extremely susceptible to contamination by
particles of dirt or dust, which can obstruct the optic path and cause performance
degradation. Good system performance requires clean optics and connector ferrules.
1. Use fiber patch cords (or connectors, if you terminate your own fiber) only from
a reputable supplier; low-quality components can cause many hard-to-diagnose
problems in an installation.
2. Dust caps are installed at IMC Networks to ensure factory-clean optical devices.
These protective caps should not be removed until the moment of connecting
the fiber cable to the device. Should it be necessary to disconnect the fiber
device, reinstall the protective dust caps.
3. Store spare caps in a dust-free environment such as a sealed plastic bag or box
so that when reinstalled they do not introduce any contamination to the optics.
4. If you suspect that the optics have been contaminated, alternate between
blasting with clean, dry, compressed air and flushing with methanol to remove
particles of dirt.
Electrostatic Discharge Precautions
Electrostatic discharge (ESD) can cause damage to any product, add-in modules or
stand alone units, containing electronic components. Always observe the following
precautions when installing or handling these kinds of products
1. Do not remove unit from its protective packaging until ready to install.
2. Wear an ESD wrist grounding strap before handling any module or component.
If the wrist strap is not available, maintain grounded contact with the system unit
throughout any procedure requiring ESD protection.
3. Hold the units by the edges; do not touch the electronic components or gold
connectors.
4. After removal, always place the boards on a grounded, static-free surface, ESD
pad or in a proper ESD bag. Do not slide the modules or stand alone units over
any surface.
WARNING! Integrated circuits and fiber optic components are
extremely susceptible to electrostatic discharge damage. Do not
handle these components directly unless you are a qualified service
technician and use tools and techniques that conform to accepted
industry practices.
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Certifications
CE: The products described herein comply with the Council Directive on
Electromagnetic Compatibility (2004/108/EC).
Class 1 Laser product, Luokan 1 Laserlaite,
European Directive 2002/96/EC (WEEE) requires that any equipment that bears this
symbol on product or packaging must not be disposed of with unsorted municipal
waste. This symbol indicates that the equipment should be disposed of separately
from regular household waste. It is the consumer’s responsibility to dispose of this
and all equipment so marked through designated collection facilities appointed by
government or local authorities. Following these steps through proper disposal and
recycling will help prevent potential negative consequences to the environment and
human health. For more detailed information about proper disposal, please contact
local authorities, waste disposal services, or the point of purchase for this equipment.
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19772 Pauling • Foothill Ranch, CA 92610-2611 USA
TEL: (949) 465-3000 • FAX: (949) 465-3020
© 2009 IMC Networks. All rights reserved.
The information in this document is subject to change without notice. IMC Networks assumes no responsibility for any
errors that may appear in this document. iMcV-Gigabit is a trademark of IMC Networks. Other brands or product names
may be trademarks and are the property of their respective companies.
Document Number 50-80824-01 A2
November 2009
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