2 1 Introduction
Thank you for choosing the D-Link DCM-100 digital, two-way DOCSIS 1.0-compliant Ethernet Cable Modem.
The DCM-100 provides customers with high-speed access to the Internet through your cable TV (CATV) network
connection. It works on any cable system that complies with MCNS DOCSIS specifications and provides a high-
bandwidth connection to the Internet. It downloads Web pages almost instantly, transfers files at exceptionally
fast speeds, and delivers real-time video and music with unsurpassed quality.
The DCM-100 digitizes data and sends it over the cable at up to 10.2 Mbps and can receive transmissions at up to 42.88 Mbps. To give you an idea of just how fast this is, digitized television quality video and audio are transmitted together at about 3 Mbps.
The DCM-100 uses a standard RJ-45 port for a 10BASE-T connection to a computer or computer network. When
properly configured these connections allow simultaneous data transfers to the Internet via the cable companyâ€™s
Designed for versatility and performance, the Ethernet Cable Modem provides the following: Product Features
â™¦ MCNS/DOCSIS 1.0 compliant
â™¦ DOCSIS 1.1 upgradeable from DOCSIS 1.0 by software
â™¦ Building MCNS MIB
â™¦ Frequency Agility
â™¦ DES Encryption and Decryption
â™¦ Automatic Signal Power Recognition/Adjustment
â™¦ Baseline Privacy Interface
â™¦ QPSK/16 QAM Upstream Modulation
â™¦ 64/256 QAM Downstream Modulation
3 DCM-100 Ethernet Cable Modem 2 Contents and Identification Contents
Open the shipping carton and carefully remove all items. In addition to this User's Manual, ascertain that you
â™¦ DCM-100 Cable Modem
â™¦ External power adapter
â™¦ Category 5 Ethernet cable
â™¦ Userâ€™s Manual on CD
â™¦ Quick Install Guide
If any item is found missing or damaged, please contact your local reseller or D-Link directly at one of the
offices listed at the rear of the manual for replacement. Identifying External Components
This section identifies all the major external components of the device. Both the front and rear panels are shown
below followed by a description of each panel feature. The indicator panel is described in detail in the next
chapter. Front Panel
The figure below shows the front panel of the device.
â™¦ LED Indicator Panel - Refer to the next chapter, â€śUnderstanding Indicators,â€ť for detailed information
about each of the DCM-100â€™s LED indicators. Rear Panel
The figure below shows the rear panel of the device.
4 â™¦ AC Power Connector - For the included power adapter, if you use a power adapter other than the one
included with the product, please make sure it has a DC output of 12V/1A.
â™¦ Ethernet 10BASE-T Port - The 10BASE-T Ethernet port accepts Category 5 or better UTP cabling with
an RJ-45 connector used to connect the DCM-100 to a LAN device (hub, switch, PC, etc.).
â™¦ Cable In - This jack is used to connect the DCM-100 to the splitter. This connection uses a standard coax
cable which is the same cable used by your cable TV company. Connection Architecture
In order for you to enjoy the benefits of your Cable Modem, your PC and TV must be properly connected to the
cable TV wire. The following diagram illustrates a typical PC/TV installation.
â™¦ Cable TV Wall Outlet - This is the normal cable TV wall outlet installed by your cable company. If you
plan to connect both your TV and your computer to the cable TV wire, the cable TV wall outlet should be
connected to a splitter.
â™¦ Splitter - This unit, usually provided by your cable TV company during installation, splits the signal onto
a second wire. The two wires coming out of the splitter can be connected to your TV (or set-top box), and
the cable modem.
NOTE: 1. If your cable TV company does not provide a splitter or you chose to buy your own, make sure
you get one with sufficient frequency range (the range should be printed on the splitter). A
range of 5 to 1000 MHz should be adequate. The splitter should provide EMI isolation. 2. Only one splitter should be placed between the point where the cable TV line enters the house
and the Cable Modem/PC (see figure above). If you have multiple TVs, split the line between
the first splitter and the TV, not the line between the splitter and the Cable Modem. 3.WARNING: Do not use amplifiers in the line leading to your Cable Modem. Not only do most
amplifiers only amplify incoming signals, while your Cable Modem receives and sends signals,
but they are also likely to distort cable modem signals. 5 DCM-100 Ethernet Cable Modem
3 Understanding Your LED Indicators
Before setting up your Ethernet Cable Modem for the first time, take a few minutes to look over this section and
familiarize yourself with the front panel LED indicators depicted below.
â™¦ Power - This LED is lit red when the device is receiving power; otherwise, it is unlit.
â™¦ Link - This LED is lit green to indicate that a valid connection exists between the Ethernet port on the
Cable Modem and your PC. If it is unlit, there is no valid connection.
â™¦ Act - A blinking green LED indicates that traffic activity is passing through your cable modem port.
â™¦ Status - This LED is lit green when the Ethernet cable is properly connected to your PC and a traditional
coaxial cable is connected to your Cable Modem tuner.This indicates a successful connection with CMTS.
The LED will now start quickly blinking as the DCM-100 attempts to lock a downstream frequency. If this
is successful, the LED will begin to blink slowly. This indicates the modem is waiting for authentication.
When the blinking stops and the LED remains steady, the Cable Modem is ready to transmit data through
the CATV network. NOTE: If no lights come, check all of your connection to see if they are properly inserted. Powering Up For the First Time
You must allow at least 1 to 3 minutes to power up the first time because the DCM-100 must find and secure a
connection. 6 DCM-100 Ethernet Cable Modem
4 Setting Up the Device Before You Start Local Cable Service
You will need to establish an account with your local cable operator in order to access the Internet with this
modem. They will assist you in setting up the modem to operate on their network.
Then for your modem to communicate with the cable service, you will first need to be able to identify the cable
modem. The Cable Media Access Control (CMAC) address is a unique number that is used for the purpose of
identifying the modem on the network. The CMAC address is found on the rear panel of the modem. You may be
required to provide this information to your cable service operator. For convenient reference you can write the
CMAC address in the space provided below. CMAC address ______________________________________ System Requirements
The capabilities and limitations of your computer equipment and configuration can affect the overall performance
of your Internet connection.
The DCM-100 Ethernet Cable Modem is designed to work with the following operating systems:
â™¦ Windows 98/98 SE (Second Edition)
â™¦ Windows NT 4.0
â™¦ Windows 2000
â™¦ Windows ME (Millennium Edition)
â™¦ Active Ethernet Port or Nic Installed
â™¦ TCP/IP installed on all devices
All computers interface that are connected to the modem must have either an active Ethernet interface or
network interface card (NIC) installed. You will need to enable TCP/IP protocol on each computer. TCP/IP should
already be installed in any computer with an active Ethernet interface. The instructions for installing TCP/IP
vary depending on the type of system used. These instructions will be included with the NIC or discussed in the
computerâ€™s manual if your PC comes equipped with an Ethernet port. Your cable operator may have additional
instructions for TCP/IP configuration that must be followed.
7 DCM-100 Ethernet Cable Modem Installation
The installation of the DCM-100 Ethernet Cable Modem can be completed in a matter of minutes. Be careful to
insure the cables are properly locked into position. Follow these steps (see the figure of the rear panel in Chapter
1. Connect the coaxial TV cable to the DCM-100 jack labeled â€śCABLE IN.â€ť
2. Connect the external power adapter into the connector labeled â€śPOWERâ€ť and the other end to the
3. Connect one end of the 10BASE-T Ethernet cable (Category 5 or better) to one of your PCâ€™s Ethernet ports
and the other end into the DCM-200 connector labeled â€śETHERNET.â€ť
Your setup should look something like this:
â™¦ The DCM-100 Ethernet Cable Modem will work with the Ethernet port connected directly to a PC, hub,
switch, or a Broadband Router ( i.e. DI-704,DI-713P)
â™¦ If you shift the Ethernet cable from one PC to another PC, the second PC will not be able to link onto the
Internet until you reboot the DCM-100 by unplugging the power cord and then reinserting it into the
8 DCM-100 Ethernet Cable Modem
If the Ethernet Cable Modem has been properly set up it is unlikely that you should experience any problems
with it under normal circumstances. However, we list here some possible solutions to problems that you might
experience. Problem Possible Solution
Cannot access the
Check all connections.
Internet or e-mail service.
Make sure the cable TV line and the Ethernet (RJ-45) cable is securely connected at all points.
Make sure the AC power adapter is plugged into the device and the power source. Check the LED indicators to see that the Power, Link and Status indicators are steadily lit for an Ethernet-connected device.
Contact your cable service operator to verify that your account is up to date and that you have two-way service.
There may be a problem with your NIC. Refer to the literature for the NIC to find a possible solution.
The TCP/IP configuration for the computer may be incorrect. Double-check to see that these network settings comply with the instructions given by the cable service operator. Call your cable company to make sure they have given you the proper settings.
Check your web browser configuration per ISP instruction.
Check the cable line connection. If this is secure then there may be a
weak signal coming from the central office. Report the problem to
your cable operator if the cable connection appears to be OK.
Try to establish a new communication with your cable operatorâ€™s
appear to be
central office. This can be accomplished by powering off the
computer and turning it back on.
Internet access cannot be
The TCP/IP configuration for the computer may be incorrect.
The PC Link light The modem is not detecting the Network Interface Card. Make sure is not green. The the cables are firmly attached to the network card in the back of light is off.
your computer and the modem as well.
Try replacing the Ethernet cable or the network card with known working components.
Run diagnostic program that came with your network card.
If this is a card that we support, troubleshoot the NIC. Otherwise, contact the organization that installed or manufacturers the card.
The power light is Check to make sure the power cable is firmly plugged into the cable not on
modem. Also, make sure that the power converter is plugged into a functional socket.
Change outlets with one you know to have power.
Replace Cable Modem.
9 DCM-100 Ethernet Cable Modem Note: If your TVâ€™s picture quality is diminished when the Ethernet Cable Modem is in operation, you may need
to contact your Cable TV operator to obtain a High Pass Filter. This should be placed between the splitter and
the TV (or if you have a digital set-top box, between the splitter and the set-top box that precedes the TV).
Contacting Technical Support
D-Link provides free technical support for customers within the United States.
U.S. customers can contact D-Link technical support through our web site,
e-mail, or by phone.
United States technical support is available Monday through Friday from 6:00 a.m. to 6:00 p.m. (PST).
If you are a customer residing outside of the United States, please refer to the list of D-Link locations that is included in this manual.
Thank you for purchasing this product. We like to receive feedback from our customers concerning our products.
Please take a moment to visit our web site. You can register your purchase on-line, learn more about the newest
networking products, and let us know the things your new network has empowered you to do.
0 DCM-100 Ethernet Cable Modem
Offices AUSTRALIA D-Link Australasia
Unit 16, 390 Eastern Valley Way, Roseville, NSW 2069 Australia
Frequency Range â€” 5 MHz to 42 MHz
Channel Bandwidth â€” 200K, 400K, 800K, 1.6M, 3.2M (Hz)
Transmission Level â€” +8 to +55dBmV (16 QAM)
+8 to +58dBmV (QPSK)
Error Correction â€” Reed-Solomon Interface
CPE Interface â€” 10BASE-T Ethernet (RJ45)
RF Interface â€” F-Type Female 75 ohm connector LEDs
Status Power Supply
AC-to-DC power adapter (provided)
DC Input: 12VDC/1A 12 DCM-100 Ethernet Cable Modem
12W (maximum) Operating Temperature
32Â°- 104Â°F (0Â°- 40Â°C) Operating Humidity
10% - 90% Storage Temperature
-4Â°- 140Â°F (-20Â°- 60Â°C) Dimensions
22 (W) x 174 (D) x 35 (H) mm Weight
578 grams (1.271b) EMI Certification
FCC Class B
CE Class B
13 DCM-100 Ethernet Cable Modem LIMITED WARRANTY
D-Link provides this limited warranty for its product only to the person or entity who originally purchased the product from D-Link or its authorized reseller or distributor. Limited Hardware Warranty: D-Link warrants that the hardware portion of the D-Link products described below (â€śHardwareâ€ť) will be free from material defects in workmanship and materials from the date of original retail purchase of the Hardware, for the period set forth below applicable to the product type (â€śWarranty Periodâ€ť) if the Hardware is used and serviced in accordance with applicable documentation; provided that a completed Registration Card is returned to an Authorized D-Link Service Office within ninety (90) days after the date of original retail purchase of the Hardware. If a completed Registration Card is not received by an authorized D-Link Service Office within such ninety (90) period, then the Warranty Period shall be ninety (90) days from the date of purchase. Product Type Warranty Period
Product (excluding power supplies and fans)
Five (5) Years
Power Supplies and Fans
Five (5) Years
Spare parts and spare kits
Ninety (90) days
D-Linkâ€™s sole obligation shall be to repair or replace the defective Hardware at no charge to the original owner. Such repair or replacement will be rendered by D-Link at an Authorized D-Link Service Office. The replacement Hardware need not be new or of an identical make, model or part; D-Link may in its discretion may replace the defective Hardware (or any part thereof) with any reconditioned product that D-Link reasonably determines is substantially equivalent (or superior) in all material respects to the defective Hardware. The Warranty Period shall extend for an additional ninety (90) days after any repaired or replaced Hardware is delivered. If a material defect is incapable of correction, or if D-Link determines in its sole discretion that it is not practical to repair or replace the defective Hardware, the price paid by the original purchaser for the defective Hardware will be refunded by D-Link upon return to D-Link of the defective Hardware. All Hardware (or part thereof) that is replaced by D-Link, or for which the purchase price is refunded, shall become the property of D-Link upon replacement or refund. Limited Software Warranty: D-Link warrants that the software portion of the product (â€śSoftwareâ€ť) will substantially conform to D-Linkâ€™s then current functional specifications for the Software, as set forth in the applicable documentation, from the date of original delivery of the Software for a period of ninety (90) days (â€śWarranty Periodâ€ť), if the Software is properly installed on approved hardware and operated as contemplated in its documentation. D-Link further warrants that, during the Warranty Period, the magnetic media on which D-Link delivers the Software will be free of physical defects. D-Linkâ€™s sole obligation shall be to replace the non-conforming Software (or defective media) with software that substantially conforms to D-Linkâ€™s functional specifications for the Software. Except as otherwise agreed by D- Link in writing, the replacement Software is provided only to the original licensee, and is subject to the terms and conditions of the license granted by D-Link for the Software. The Warranty Period shall extend for an additional ninety (90) days after any replacement Software is delivered. If a material non-conformance is incapable of correction, or if D-Link determines in its sole discretion that it is not practical to replace the non-conforming Software, the price paid by the original licensee for the non-conforming Software will be refunded by D-Link; provided that the non-conforming Software (and all copies thereof) is first returned to D-Link. The license granted respecting any Software for which a refund is given automatically terminates. What You Must Do For Warranty Service:
Registration Card. The Registration Card provided at the back of this manual must be completed and returned to an Authorized D-Link Service Office for each D-Link product within ninety (90) days after the product is purchased and/or licensed. The addresses/telephone/fax list of the nearest Authorized D-Link Service Office is provided in the back of this manual. FAILURE TO PROPERLY COMPLETE AND TIMELY RETURN THE REGISTRATION CARD MAY AFFECT THE WARRANTY FOR THIS PRODUCT.
Submitting A Claim. Any claim under this limited warranty must be submitted in writing before the end of the Warranty Period to an Authorized D-Link Service Office. The claim must include a written description of the Hardware defect or Software nonconformance in sufficient detail to allow D-Link to confirm the same. The original product owner must obtain a Return Material Authorization (RMA) number from the Authorized D-Link Service Office and, if requested, provide written proof of purchase of the product (such as a copy of the dated purchase invoice for the product) before the warranty service is provided. After an RMA number is issued, the defective product must be packaged securely in 14 DCM-100 Ethernet Cable Modem
Register by mail or online at http://www.dlink.com/sales/reg/ Registration Card Print, type or use block letters. Your name: Mr./Ms ____________________________________________________________________________
Organization: ________________________________________________Dept. ____________________________
Your title at organization:________________________________________________________________________
Organization's full address: ______________________________________________________________________
Date of purchase (Month/Day/Year):_______________________________________________________________ Product Model Product Serial No. * Product installed in type of * Product installed in computer (e.g., Compaq 486) computer serial No.
(* Applies to adapters only) Product was purchased from: Reseller's name:______________________________________________________________________________ Telephone:_______________________________________ Fax:_______________________________________ Reseller's full address:_________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ Answers to the following questions help us to support your product: 1.Where and how will the product primarily be used?
Home Office Travel Company Business Home Business Personal Use 2. How many employees work at installation site?
1 employee 2-9 10-49 50-99 100-499 500-999 1000 or more 3. What network protocol(s) does your organization use?
XNS/IPX TCP/IP DECnet Others_____________________________ 4. What network operating system(s) does your organization use?
D-Link LANsmart Novell NetWare NetWare Lite SCO Unix/Xenix PC NFS 3Com 3+Open
Banyan Vines DECnet Pathwork Windows NT Windows NTAS Windows '95
Others__________________________________________ 5. What network management program does your organization use?
D-View HP OpenView/Windows HP OpenView/Unix SunNet Manager Novell NMS
NetView 6000 Others________________________________________ 6. What network medium/media does your organization use ?