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D-Link DCM-202 User Manual

Section 2 - Installation

To verify the DCM-202 modem is installed:

Vista

™

Users: Click on

Start > Control Panel > System

XP Users: Click on

Start > Control Panel > System >

Hardware

2000 Users: Click on

Start > Settings > Control Panel > System

> Hardware

Click the

Device Manager

tab. Scroll down and click the

+

sign

next to

Network Adapters

. The D-Link modem will appear.

Verify USB Installation

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D-Link DCM-202 User Manual

Section 3 - Troubleshooting

Problem: “I cannot access my e-mail or Internet service.” (USB Only)

1. Verify that the Power, Cable, and Status, and USB LEDs are lit and not blinking.

2. Verify that the USB LED is green or blinking green.

3. Check all connections:

• Make sure the coaxial cable is securely connected to the cable jack on the back of the cable modem.

• Verify that the USB cable is securely plugged into both the cable modem and the computer.

• Make sure the power adapter is properly plugged into both the cable modem and a wall outlet or surge

protector.

4. Power cycle the cable modem by unplugging the power adapter from its electrical outlet and then plugging it

back into the outlet. Then try accessing the Internet.

5. Power cycle the computer. To do this:

• Power off the computer.

• Unplug the computer from its electrical outlet or surge protector and then plug it back into the electrical

outlet or surge protector.

• Power the computer on.

• Try accessing the Internet.

6. Call your cable operator to verify that their service is two-way. This cable modem is designed for use with

Troubleshooting

This chapter provides solutions to problems that can occur during the installation and operation of the DCM-202. Read the following

descriptions if you are having problems.

(The examples below are illustrated in Windows

®

XP.

If you have a different operating

system, the screenshots on your computer will look similar to the following examples.)

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D-Link DCM-202 User Manual

Section 3 - Troubleshooting

7. If you are using a cable line splitter so that you can connect the cable modem and a television to the same cable

wall jack, try removing the splitter and reconnecting the cables so that the cable modem is connected directly

to the cable wall jack. Then try accessing the Internet.

To release and renew the IP address for the Windows 2000 and XP operating systems:

1. Click

Start

and select

Programs

, then

Accessories

.

2. Click

Command Prompt

.

3. At the command prompt (C:\), type

ipconfig/release

and press

Enter

. Windows releases the IP address.

4. At the command prompt type

ipconfig/renew

. Windows renews the IP address.

5. At the command prompt (C:\), type

exit

and press

Enter

to return to the Windows desktop.

Problem: “All of the LEDs on the front of my cable modem look right, but I cannot access the Internet.”

1. If the Power, Cable, Status, and Eth LEDs are lit and not blinking the cable modem is operating properly.

Try shutting down the computer and then turning it back on. This will cause the computer to re-establish

communications with your local cable provider.

2. Power cycle the cable modem by removing the power adapter from its outlet and then plugging it back into the

outlet. Wait several minutes for the cable modem to re-establish communications with your local cable operator,

then try accessing the Internet.

3. Verify that you have installed TCP/IP properly (for Windows 2000 or XP : ipconfig), and that the TCP/IP parameters

provided by your local cable provider are correct for your computer.

two-way cable plants.

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D-Link DCM-202 User Manual

Section 3 - Troubleshooting

4. If you are using a cable line splitter so that you can connect the cable modem and a television to the same

outlet:

• Try removing the splitter and reconnecting the cables so that the cable modem is connected directly to the

cable wall jack.

• Wait several minutes, then try accessing the Internet.

Problem: “The power on my cable modem goes on and off sporadically.”

• You might be using the wrong power adapter. Check that the power adapter you are using is the one that came

with the cable modem.

CAUTION: You must use the supplied power adapter that comes with the DCM-202 cable modem. Using the wrong power adapter

can damage the cable modem.

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D-Link DCM-202 User Manual

Appendix A - Technical Specifications

Technical Specifications

Compliant Standard

• DOCSIS 1.0

• DOCSIS 1.1

• DOCSIS 2.0

Interface

• 10/100BASE-T (half/fullduplex, auto-sensing) 1 port

• USB Device (12Mbps, full speed mode) 1 port WAN

Interface

• F type female 75

Receiver:

• Demodulation: 64/256QAM

• Max Speed: 38Mbps (64QAM) / 43Mbps(256QAM)

• Frequency Range: 91 to 857 MHz ±30 kHz (Center)

• Bandwidth: 6MHz

• Signal Level: -15dBmV to +15dBmV

Transmitter:

• Modulation: 64/256QAM TDMA: QPSK, 8QAM, 16QAM,

32QAM, 64QAM S-CDMA: QPSK, 8QAM, 16QAM, 32QAM,

64QAM, 128QAM

• Max Speed: 320, 640, 1280, 2560, 5120kbps (QPSK) 640,

1280, 2560, 5120, 10240kbps (16QAM)

• Frequency Range: 5 to 42MHz (edge to edge)

• Bandwidth:

0.2, 0.4, 0.8, 1.6, 3.2MHz TDMA: 200, 400,

800, 1600, 3200 and 6400 kHz S-CDMA: 1600, 3200 and

6400 kHz

• Signal Level: +8dBmV to +58dBmV (QPSK)+8dBmV to

+55dBmV (16QAM) TDMA: +8 to +54 dBmV (32QAM,

64QAM) +8 to +55 dBmV (8QAM, 16QAM) +8 to +58 dBmV

(QPSK) S-CDMA:+8 to +53 dBmV (all modulations)

(Output level of CM can automatically controlled by CMTS through power

ranging function), Step: 1dB

• Output Return Loss:

> 6 dB (5-42 MHz) and (91~857

MHz)

Max. Number of CPEs:

• 32 (32 MAC addresses)

Filtering:

• LLC: 16

• IP: 32

Frequency Search:

• Frequency Cache: 4 entries Frequency

• Channel Plan: 250kHz step

Number of SID:

16

Safety:

• EN60950, UL1950, UL1310 (AC-DC adapter)

EMC:

• EN55022 (Emission), EN55024 (Immunity) FCC Part 15

class B, VCCI Class B

Power Supply:

• AC-DC Adapter: Linear AC-DC Adapter 110V±10 %,

50/60Hz