com21 DP111 Doxport 111 Cable Modem User Guide

: June 6, 2024
: com21

Table of Contents

INTRODUCTION
Package Contents
Before You Start
Installing the Cable Modem
Configuring TCP/IP
Verifying Your IP Address
Diagnostics
Table 2 Specifications
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Download This Manual (PDF format)

Imagine the Internet without the wait.

The DOXport 111 Cable Modem User’s Guide

SAFETY PRECAUTIONS
Be Careful – Be careful when unplugging this product from the wall outlet, as the AC adapter may be hot.
Protect Power Cords – Route power cords so that they are not likely to be walked on, or pinched by items placed upon or against them.
Do Not Overload – Do not overload wall outlets or extension cords. Overloaded AC outlets, extension cords, frayed power cords, damaged or cracked wire insulation, and broken plugs are dangerous. They can result in shock or fire hazards. Periodically examine the cord, and, if its appearance indicates damage or deteriorated insulation, have it replaced by your service technician.
Check Ventilation – Openings are provided in the enclosure for ventilation to ensure the reliable operation of the product and to protect it from overheating. Do not block or cover these openings.
Do Not Remove Covers – Do not attempt to service this product yourself. Opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
Use Care in Moving Product-and-Cart Combinations – Quick stops, excessive force, and uneven surfaces may cause the product-and-cart combination to overturn. Unplug Power before Cleaning – Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning.
Unplug Power before Cleaning – Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning.
Protect from Lightning – To protect 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 cables. This will prevent damage from lightning and power line surges.
Refer Servicing – 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 on, or objects have fallen into the product.
If the product has been exposed to rain or water.
If the product does not operate normally according to operating instructions.
If the product has been dropped or the enclosure has been damaged.
When the product exhibits a distinct change in performance, such as the inability to perform basic functions.

INTRODUCTION

Your DOXport 111 Cable Modem
Your DOXport 111 cable modem gives you high-speed access to the Internet through your cable TV (CATV) network. The DOXport III works on any cable system that complies with the DOCSIS 1.0 or 1.1 specification.

Package Contents

Check the contents of the package. It should contain the items shown in Figure

Please contact the place of purchase if any of the above-listed items are missing or damaged.

Before You Start

Before you install your DOXport 111, you will need the following items. These items are not supplied with the DOXport III.

DOCSIS cable modern service from your local service provider
CATV (cable TV) outlet
Two-way CATV splitter
Two coaxial cables; one cable connects the CATV outlet to the 2-way splitter, the other cable connects one output of the splitter to your cable modem
10Base-T Ethernet LAN card or USB-to-Ethernet LAN adapter, installed and configured in your personal computer
TCP/IP protocol stack

Installing the Cable Modem

Place your DOXport III cable modem in an area that will not block any of its ventilation holes. A convenient stand is included to hold the modem in an upright position, as shown in Figure 2. Figure 3 shows the rear panel connectors for Ethernet, Power, and RF (cable).

Please use the SETTING UP sheet provided in your package. The SETTING UP sheet defines a step-by-step procedure for setting up your modem. To set up your modem:

Connect the cable TV coaxial cable to the input connector of a signal splitter.
Connect a coaxial cable from one of the output connectors of the splitter to the input connector of the television set. Connect a coaxial cable from the other output connector of the splitter to the RF input connector on the cable modem rear panel.
Connect a 10Base-T cable from your computer to the 10Base-T Ethernet connector on the cable modem rear panel.
Connect the 12 VDC 1A AC adapter to the power connector on the cable modem rear panel. Then plug the AC adapter into the facility outlet.
Look at the label on the side of the cable modem. This label (Figure 3) shows the serial number and MAC (Media Access Control) address of your cable modem. Both of these numbers are unique to your modem; write them in the space below in case you need them for future reference. The network uses the MAC address to communicate with your modem.
Serial number……………………………………………………… MAC address…………………………………………………………….

Your finished installation should have the configuration shown in Figure 4.

Configuring TCP/IP

With the modem connected, make sure that you have your computer configured for TCP/IP and check for an IP address. The following instructions are for Windows 95 or 98. If you are using a different operating system, refer to the user guide for that system.
To configure TCP/IP:

On the Windows desktop, click START.
Select SETTINGS and then CONTROL PANEL from the pop-up menu. Double-click the NETWORK icon on the CONTROL PANEL window The NETWORK window appears, as shown in Figure 5.
Select the CONFIGURATION tab on the NETWORK window.
Check to see if TCP/IP has been installed for the Ethernet card. If TCP/IP appears in the list of network components, it is installed. Select it and proceed to step 8. If it doesn’t appear on the list, click ADD and continue with step 5.
Double-click the PROTOCOL option on the SELECT NETWORK COMPONENT TYPE window (Figure 6).
Click MICROSOFT in the MANUFACTURERS section and then click TCP/IP in the NETWORK protocol section on the SELECT NETWORK PROTOCOL window (Figure 7).
Click OK
Click TCP/IP on the NETWORK window (Figure 8). If you have more than one TCP/IP entry, choose the one associated with the Ethernet card connected to the DOXport 111.
Click PROPERTIES.
Select the IP ADDRESS tab on the TCP/IP PROPERTIES window (Figure 9).
Click on OBTAIN AN IP ADDRESS AUTOMATICALLY.
Click OK to accept the TCP/IP settings.
Click OK to dose the NETWORK window.
Click OK when a prompt to restart your computer is displayed, and then click OK again.

Verifying Your IP Address

The following instructions are for Windows 95 or 98. If you are using a different operating system, refer to the user guide for that system. To check the IP address:

On the Windows desktop, click START.
Select RUN.
Type winipcfg.exe. A window similar to the example in Figure 10 appears.
Select your adapter name.
Click RENEW
Click OK after the system displays the IP address.

If, after performing this procedure, your computer doesn’t access the Internet, call your service provider. They will assist in verifying your configuration.

Diagnostics

The cable modem has five LED panel lights (Figure II ). The LEDs let you monitor status during install-location and operation.

The POWER LED lights and the modem starts the service acquisition process when power is applied to the modem. No additional intervention is required on your part. The modem automatically finds the data channel, registers, and connects to your computer.
Check the cable modem status. The front panel LED indicators show when the cable modem is operating properly. Basic indications are:
POWER – Green
CABLE – Green
PC – Green (if PC is on)
DATA – Flashing or off
TEST – Off
Detailed LED indications are described in Table I.

Table 1 Detailed LED Indications

LED

| Status|

Description

---|---|---
POWER| Off
Solid Green| Not receiving power Receiving power
CABLE| Off
Solid green
Slow blinking green
Fast blinking green| Not detecting the signal from the cable network or not receiving power Modem is online and ready to transmit data
Detecting signal and trying to connect to the cable network
Rebooting is in progress
PC| Off
Solid green| Not detecting Ethernet connection or not receiving power Ethernet connection is established to powered-up computer
DATA| Off
Blinking green| Not transmitting data or not receiving power Modern is transmitting
TEST| Off
Blinking amber Solid amber| Ready to use after initial self-test, or not receiving power
Initial self-test in progress or software downloading in progress Self-test failed. Corrective action: try rebooting. If the problem persists, contact your retail supplier or call or 24-hour customer support at 888868-4154

The Com21 DOXport III cable modem complies with DOCSIS 1.0 and I.I. Table 2 lists detailed operating and environmental specifications.

Table 2 Specifications

Parameter|

Specification

---|---

DOWNSTREAM

Demodulation| 30 Mbps (64QAM) / 40 Mbps (256QAM)
Physical speed| Reed Solomon + Trellis (Enhances Annex B)

Error correction

UPSTREAM

Modulation| QPSK /16QAM
Physical speed| 320, 640, 1280, 2560, 5120 Kbps (QPSK) 640, 1280, 2560, 5120, 10240 Kbps (16QAM)
Error correction| Reed Solomon
Frequency range| 5 to 42 MHz (edge-to-edge), in 1Hz steps
Bandwidth| 200, 400, 800, 1600, 3200 kHz
Output signal level| 8 dBmV to 58 dBmV (QPSK)
8 dBmV to 55 dBmV (16QAM)

SNMP MANAGEMENT

MIB Group| MIB 11, MCNS MIB

INTERFACE

i) l’E| IEEE802.3/10Base-T
Cable| F type female 75 ohm

POWER

Power input| 12VDC
Power consumption| 8 W (Max)

MECHANICAL

Size| Width 2.38 in (6 cm) Depth 8.13 in (20.6 cm) Height 5.88 in (14.9 cm)
Weight| 2.1 lb (4.62 kg)

ENVIRONMENTAL

INDEX

Numerics

10Base-T………………………………….3
16QAM…………………………………13
64QAM/256QAM………………..12

bandwidth………………………….12

CATV…………………………………..1
configuration…………………………10

data channel………………………11
demodulation…………………….12, 13
DOCSIS……………………………..1, 12
downloading……………………..12
DTE…………………………………13

emission…………………………..14
environment…………………….12
error correction……………….13
Ethernet……………………………6, 7
F
FCC………………………………..14
frequency range………………12, 13
I
IEEE802.3/10Base-T…….13
input connector………………..3
input impedance…………….13
input signal level…………….13
interference………………………2
Internet………………………….10

| IP address………………5, 9,

MCNS………………………………..13 MIB……………………………………13

obtain IP address……………………9 operating system…………………5,10 output signal level…………………13

physical speed………………………12
power consumption……………..13 protocol option………………………6

QPSK…………………………………..13

Reed Solomon………………………..12 register……………………………………11 return loss………………………………13 RF cable…………………………………..2 RF input…………………………………..3

select adapter………………………….10 self-test…………………………………..12 service provider……………………..10 SNMP…………………………………….13 splitters………………………………………3 status………………………………………11

TCP/IP……………………………………5, 6

| Trellis………………………………….12

UL1310………………………………14 UL1950……………………………………14

ventilation……………………………….2 W Windows…………………………….5 winipcfg.exe 10

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Milpitas CA 95035
tel: +1.408.953.9100
fax: +1.408.953.9299
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For more information, contact sales at +1.408.953.9100 or email at sales@com21.com
Note: This product documentation is provided for informational purposes only and may be subject to change. Specifications are for reference only.
©2000 Com21, Inc. All rights reserved. Com21 is a registered trademark of Com21, Inc. The Com21 logo, Imagine the Internet without the wait, the Red Door design, and DOXport are trademarks of Com21, Inc. All specifications are subject to change without notice.
P/N 271-0012-00

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Contact Information
If you need help installing your modem, you can contact Com21 by telephone or Inter-net:
Phone: 1.888.868.4154
Website: www.com21.com
Important Rules for Safe Operation
Please read and follow the instructions in this manual. Use the AC adapter that is provided with the modem. Do not disconnect the RF cable from your cable modem while the modem is on.

FCC Compliance
This 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: