Toshiba DOCSIS Cable Modem
Owner’s Manual
PCX1000/PCX1100
Jan. 2000
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Table of Contents
Congratulations on Your Purchase
2
Contact Information
Support Information
Sales Information
Web Page
2
2
2
2
Important Rules for Safe Operation
Installation
3
3
4
5
Use
Service
Overview
6
6
6
7
How does a cable modem work?
How does a cable modem connect to a computer?
What is DOCSIS?
Getting Started
What’s in the box?
Front Panel LEDs
Connectors and Switches
Diagnostics
8
8
8
8
9
Specifications
10
How to Use the Stand
Q & A
11
12
FCC Compliance
Glossary
13
14
Installing the Cable Modem
Back Cover
1
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Congratulations on Your Purchase!
Your new Toshiba DOCSIS Cable Modem will provide you with high-speed access to the Internet
through your cable TV (CATV) network- accesses at a fraction of the time it takes traditional telephone
modems. In addition, your service will be always connected. Those two features give you the information
you want, when you want it … and your telephone line is kept free.
Contact information
Support Information
Phone:
(949) 583-3223
Fax:
(949) 583-3597
e-mail:
Sales Information
Phone:
(949) 461-4840
e-mail:
Web Page
2
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Important Rules for Safe Operation
In addition to the careful attention devoted to quality standards in the manufacture of your
Toshiba DOCSIS Cable Modem, safety is a major factor in the design of every product.
However, safety is your responsibility, too.
This section lists important information that will help assure your enjoyment and proper use of the Cable
Modem and accessory equipment. Please read them carefully before operating and using your modem.
Installation
Read and Follow Instructions - You should read all the safety and operating
instructions before operating the modem. Follow all operating instructions.
Retain Instructions - You should save all the safety and operating instructions, for
your future reference.
Heed Warnings - Comply with all warnings on the products and in the operating
instructions.
Check Power Sources - Operate this product only from the type of power source
indicated on the product's marking label. If you are not sure of the type of power
supplied to your home, consult your dealer or local power company.
Be Careful of Overloading - Do not overload wall outlets or extension cords, as this
can result in a risk of fire or electric shock. Overloaded AC outlets, extension cords,
frayed power cords, damaged or cracked wire insulation, and broken plugs are
dangerous. They may result in a shock or fire hazard. Periodically examine the cord,
and, if its appearance indicates damage or deteriorated insulation, have it replaced by
your service technician.
Protect Power Cords - Route power supply cords so that they are not likely to be
walked on or pinched by items placed upon or against them.
Pay particular attention to cords where they are attached to plugs and convenience
receptacles, and examine the point where they exit from the product.
Check Ventilation - Slots and openings in the enclosure are provided for ventilation to
ensure reliable operation of the product and to protect it from overheating. Do not block
or cover these openings. Never block these openings by placing the product on a bed,
sofa, rug, or other similar surface. Never place this product near or over a radiator or
heat register, or any other heat source (including amplifiers). Do not place this product
in a built-in installation, such as a bookcase or equipment rack, unless you provide
proper ventilation.
Do Not Use Accessories - Do not use attachments, unless they are recommended by
Toshiba, as they may cause electrical or fire hazards.
Use the Recommended AC Adaptor - You must use the Adaptor that comes with
your Toshiba Cable Modem.
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Do Not Use Near Water - Do not use this product near water - for example, near a
bath tub, wash bowl, kitchen sink or laundry tub, in a wet basement or near a swimming
pool, and the like.
Do Not Place Near High Temperature Source - for example near a steamer, Kitchen
range fire, and the like.
Use Caution in Mounting This Product - Do not place this product on an unstable
surface or support. The product may fall, causing serious injury to a child or adult, as
well as serious damage to the product.
Use Care in Moving Product-and-Cart Combinations - Quick stops, excessive,
force and uneven surfaces may cause the product-and-cart combination to overturn.
Ground the Cable System - Be sure that the outside cable system is grounded, so as
to provide some protection against voltage surges and built-up static charges.
Section 810 of the National Electric Code, ANSI/NFPA No. 70-1984 (Section 54 of the
Canadian Electrical Code, Part 1) provides information with respect to proper
grounding of the cable system.
Do not disconnect RF cable from your Cable Modem while the power to your
modem is on.
USE
Unplug Power Before Cleaning - Do not use liquid cleaner or aerosol cleaner. Use a
damp cloth for cleaning.
Keep Objects Out of Openings - Never push objects of any kind into this product
through openings, as they may touch dangerous voltage or "short-out" parts, which
could result in a fire or electric shock. Never spill liquid on the product.
Protect From Lightning - For added protection for this product during a lightning
storm, or when it is left unattended and unused for long periods of time, unplug it from
the wall outlet, and disconnect the cable system. This will prevent damage to the
product due to lightning and power line surges.
Take at least 10 seconds between DC plug off and on.
4
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Service
Do Not Remove Covers - Do not attempt to service this product yourself, as opening
or removing covers may expose you to dangerous voltage or other hazards. Refer all
servicing to qualified service personnel.
Unplug this product from the wall outlet carefully, as the AC adaptor may be hot.
Refer Servicing to Qualified Service Personnel Under the Conditions Listed
Below
♦ When the power supply cord or plug is damaged.
♦ If liquid has been spilled or objects have fallen into the product.
♦ If the product has been exposed to rain or water.
♦ If the product does not operate normally by following the operating
instructions.
♦ If the product has been dropped or the cabinet has been damaged.
♦ When the product exhibits a distinct change in performance, such as the
inability to perform basic functions - this indicates a need for service.
Require Safety Check - Upon completion of any service or repairs to this product, ask
the service technician to perform safety checks recommended by service point to
determine that the product is in safe operating condition.
5
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Overview
The modem provides you with high-speed data communications over the television
cable network by following the widely accepted DOCSIS/MCNS standards being
developed by the Multimedia Cable Network System (MCNS) consortium. Those
standards offer a combination of high performance and interoperability among many of
the cable system operators in North America.
How does a cable modem work?
As you know, digital signals are represented by high and low electrical voltage levels.
And how fast these levels can switch and still be transmitted is determined by the
"bandwidth" of the transmission system. The pair of wires used in a telephone
connection have greatly limited bandwidth, because of their electrical characteristics.
So what we do is connect a device called a modem between the computer output and
the phone line. The modem generates an electrical wave whose strength and phase
change in step with the highs and lows of the computer's digital output. It's because of
the "smoothness" of the resultant signal that a higher data rate can be transmitted.
A cable modem MOdulates and DEModulates electrical signals in the same sense that
the telephone modem does. However, since coaxial cable can carry much higher wave
frequencies, cable modems are far more sophisticated. Their internals can include a
tuner, a bridge, a router, an encryption/decryption device, an SNMP agent and an
Ethernet hub. Furthermore, none of the activity caused by these circuits and codes
disturbs your regular cable TV reception.
How does a cable modem connect to a computer?
The 10BASE-T Ethernet connection used in this Cable Modem is emerging as the most
popular. This connection has been used for years to allow business computers to talk
to each other in a LAN (Local Area Network).
The new DOCSIS standard may change this in the future. But for now, an Ethernet
card must be installed in your computer for the Cable Modem to work.
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What is DOCSIS?
Data Over Cable Service Interface Specifications. DOCSIS defines interface
requirements for cable modems involved in high-speed data distribution over a cable
television network. On November 17, 1997, Cable Television Laboratories, Inc. (Cable
Labs) and its members established a formal path of certification for cable modem
equipment suppliers to obtain an interoperability seal for their products based on the
DOCSIS specification. This certification process provides cable modem equipment
suppliers with a fast, market-oriented method for attaining cable industry
acknowledgment of compliance with DOCSIS.
The seal is meant to provide the purchaser with a way to be confident that the modem
equipment to be purchased is compliant with the specification, and that the equipment
interoperates with DOCSIS products made by other vendors.
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Getting Started
What’s in the Box?
Make sure that you’ve received the following items. If any item is missing or damaged,
contact your dealer immediately.
♦ Toshiba DOCSIS Cable Modem
♦ Ethernet Cable (6feet)
♦ AC Adaptor (AD-121AN)
♦ Stand
♦ This manual
Front Panel LEDs
Connectors and Switches
Refer to the back cover for cable modem installation instructions.
8
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Diagnostics
The Cable Modem has five status LEDs for diagnostics. You can monitor the LEDs
during installation and when you are using.
Table 1 shows Cable Modem status LEDs and identifies what each LED light means.
This table will help you to diagnose problems.
Function
Power
Color
Green
Definition
-
-
-
-
dark for power off
solid for power on
Cable
Green
dark for no downstream RF carrier present or power off
flashing slowly for downstream RF carrier present and
ranging in progress
-
-
flashing fast for registration in progress
solid for the Cable Modem registered and ready to
transfer data
PC
Green
Green
-
-
-
dark for no Ethernet carrier present or power off
solid for Ethernet carrier present
dark for no user data going through the Cable Modem
or power off
Data
-
-
flashing for user data going through the Cable Modem
dark for initial self-test of the Cable Modem OK or
power off
Test
Amber
-
flashing for initial self-test of the Cable Modem in
progress or software down loading of the Cable
Modem in progress
- solid for self-test failure of the Cable Modem
Table 1 Status LEDs
9
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How to Use the Stand
Please attach the stand to the bottom of the cable modem
10
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Specifications
The Toshiba DOCSIS Cable Modem is DOCSIS/MCNS compliant.
Receiver
Physical Speed:
Symbol rate:
30 Mbps (64QAM) / 43 Mbps (256QAM)
5.056941 Msym/sec (64QAM);
5.360537 Msym/sec (256QAM)
64QAM / 256QAM
Demodulation:
Bandwidth:
6 MHz
Frequency range:
Input signal level:
Input impedance:
Return loss:
88 MHz to 860 MHz (edge-to-edge) in 62.5 kHz steps
-15dBmV to +15dBmV
75 ohms
> 6 dB from 88 MHz to 860 MHz
Transmitter
Physical Speed:
320,640,1280,2560,5120Kbps(QPSK)
640,1280,2560,5120,10240Kbps(16QAM)
160, 320, 640, 1280, 2560 ksym/sec
QPSK / 16QAM
Symbol rate:
Modulation:
Bandwidth:
Frequency range:
Output signal level:
200, 400, 800, 1600, 3200 kHz
5 to 42 MHz (edge-to-edge), in 1Hz steps
8 dBmV to 58 dBmV (QPSK)
8 dBmV to 55 dBmV (16QAM)
PC Interface
10BASE-T:
Power
AC adapter input:
AC adapter output
to cable modem:
AC Power
10Mbps; half-duplex
120VAC @ 60Hz
12VDC @1A
consumption:
Mechanical
Size:
8 W (Typ)
1.96 in. (width) x 8.07 in. (depth) x 5.96 in. (height)
2.1 lb
Weight:
Environmental
Operating
temperature:
Humidity:
32 to 104 degrees Fahrenheit
10 to 90 percent (non-condensing)
Storage temperature: -4 to 140 degrees Fahrenheit
Safety:
Emission:
Accessory:
UL1310, UL1950
FCC part 15, class B
AC Adapter
11
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Q & A
Q: How to connect the cable modem to the hub/switch ?
A: Cable Modem is connected to the uplink port on the hub/switch. Or use cross-over
Ethernet cable to connect the normal port on the hub/switch. Please make sure that
hub/switch supports 10BASE-T. Cable modem supports only 10BASE-T.
Cross-over Cable
or connect to
uplink port
Cable TV Coax
HUB/ Switch
Cable Modem
Q: Do I need to turn off the cable modem ?
A: You can leave cable modem on all the time.
Q: How can I connect multiple PC to the cable modem?
A: You can use hub or switch for physical connection. Cable modem is controlled by
Cable Operator to allow how many PCs is available. Please contact local Cable
Operator to activate multiple PC under the cable modem.
Q: Where can I download the driver for Cable modem?
A: The cable modem is a stand-alone device that have an Ethernet Port. All
workstations or hub must have a 10 Base T Ethernet port or card to connect to the
cable modem. Since the cable modem is a stand alone device, there is no special
driver needed on the workstation.
Q: How can I configure the modem and get monitoring information from the
modem?
A: The modem can only be configured and monitored by your cable operator.
12
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FCC Compliance
This Toshiba DOCSIS Cable Modem has been tested and found to comply with the
limits for a Class B personal computer and peripherals, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this unit
does cause harmful interference to radio or television reception, which can be
determined by turning the unit off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
♦ Reorient or relocate the receiving antenna.
♦ Increase the separation between the equipment and receiver.
♦ Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
♦ Consult the dealer or experienced radio/TV technician for help.
13
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Glossary
10BASE-T
Unshielded, twisted pair cable with an RJ-45 connector, used with Ethernet LAN. “10”
indicates the speed (10 Mbps), “Base” refers to baseband technology, and “T” means
twisted pair cable.
Cable TV Coax
Cable that allows wide bandwidth transmission over long distances. Coaxial cable
(coax) comprises an inner conductor surrounded by insulation. An outer conductor
wraps around the insulation, which, in turn, is covered by an outer plastic covering.
Ethernet card
A plug-in circuit board installed in an expansion slot of a personal computer. The
Ethernet card (sometimes called a Network Interface Card, or NIC) takes parallel data
from the computer, converts it to serial data, puts it into a packet format, and sends it
over the 10BASE-T LAN cable.
F connector
A type of coaxial connector, labeled RF on the rear of the Toshiba Cable Modem, that
connects the modem to the cable system.
Headend
The equipment, in the central office of the service provider, where the cable signals
originate.
Hybrid Fiber/ Coaxial (HFC) system
A system where the trunk of the cable plant is of fiber technology. Somewhere near the
subscriber’s home, the fiber is connected to a coaxial cable, and the signal is converted
so that it’s compatible with the fiber media. The coaxial cable then runs through the
branches of the network and is finally dropped into the home.
HUB
A device used to connect multiple computers to the cable modem.
Internet
A collection of interconnected networks used for worldwide computer-based
communications.
IP Address
A unique, 32-bit address assigned to every device in a network. An IP (Internet Protocol)
address has two parts: 1) a network address and 2) a host address. Each network is
assigned an address by a government agency, and each company administrator
assigns an address to each host computer.
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Modem registration
The process the Toshiba Cable Modem uses to make itself known to the headend
equipment. Once authorized by the router, the modem is assigned upstream and
downstream channels for data communication.
Network driver
A (software) file included with the Ethernet card. The file is loaded on the computer to
allow the computer to recognize the Ethernet card. See Ethernet Card.
RJ-45
Connector on the Toshiba Cable Modem, labeled 10BASE-T, that connects the modem
to a computer or to a HUB.
Subscriber
A computer user in the home who accesses a data service using the Toshiba Cable
Modem.
Subnet
A network subdivision. When subnetting us used, the IP (Internet Protocol) address is
divided into a subnet number and a host number. Hosts and gateways identify the bits
used for the network and subnet number through the use of a subnet mask.
TCP/IP communication stack
Software in the subscriber computer that processes packets through the
communication layers. The subscriber configures the IP address for the computer and
the router default gateway in the software. The TCP/IP communication stack handles
all the communications with the subscriber’s application.
15
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Installing the Cable Modem
To avoid thermal problems, allow at least one inch spacing between the
ventilation holes and any object to either side of the unit. It's best to have no
obstructions on top of the unit. The top of the unit should be at least two inches
from any obstruction.
Connect the cable modem using the following steps, referring to the figure
below.
1. Connect the Cable TV coax to the input connector of a signal splitter.
2. Connect a coaxial cable from one of the output connectors of the splitter to
the input connector of the television set.
3. Connect a coaxial cable from the other output connector of the splitter to
the RF input connector on the cable modem rear panel.
4. Connect the 10Base-T signal cable from your computer to the 10Base-T
connector on the cable modem rear panel.
5. Connect the AC adapter to the DC IN 12V 1A jack on the cable modem
rear panel. Then plug in the AC adapter to the wall electrical outlet.
Cable TV
Coax
10BaseT
Splitter
Connection
Tlevision
Cable
Modem
The power indicator LED on the modem front panel will light, if power is
present at the outlet. The modem will start operating once power is connected.
No additional operator intervention is required. It will automatically find the data
channel, register and connect to your computer.
Check the cable modem status. The front panel indicators (LEDs) show that
the cable modem is operating properly when they are in the following
condition:
POWER – lit
CABLE - lit
PC - lit
DATA - flashing or not lit
TEST - not lit
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