Cisco Router DPC/EPC2425 DOCSIS User Manual

							
4028315 Rev A    101  
  Frequently Asked Questions
  
 
Q.  Can I watch TV and surf the Internet at the same time?  
A.  Absolutely! If you subscribe to cable  television service, you can watch TV and 
use your residential gateway at the same time by connecting your TV and your 
residential gateway to the cable network  using an optional cable signal splitter. 
Q.  Can I run more than one device on the modem?  
A.  Yes. A single residential gateway w ill theoretically support up to 253 Ethernet 
devices utilizing user-supplied Ethernet hu bs or routers that you can purchase at 
your local PC or office supply retailer.  
  
						

							
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Having Difficulty?   
Having Difficulty? 
Common Troubleshooting Issues 
I dont understand the front panel status indicators  
See Front Panel LED Status Indicator Func tions, for more detailed information on 
front panel LED status indicator operation and function. 
The modem does not register an Ethernet connection  
   Verify that your computer has an Ethern et card and that the Ethernet driver 
software is properly installed. If yo u purchase and install an Ethernet card, 
follow the installation inst ructions very carefully. 
   Verify the status of the front panel LED status indicators. 
The modem does not register an Ethern et connection after connecting to a hub 
If you are connecting multiple PCs to th e residential gateway, you should first 
connect the modem to the uplink port of th e hub using the correct crossover cable. 
The LINK LED of the hub will illuminate continuously. 
The modem does not register a cable connection  
The modem works with a standard 75-ohm RF coaxial cable. If you are using a 
different cable, your residential gateway  will not function properly. Contact your 
service provider to determine whethe r you are using the correct cable. 
Verify that you have followed the procedures  in How Do I Troubleshoot My Internet 
Service Installation?. 
There is no dial tone when I lift the telephone handset  
   Your telephone wiring may be connected to the wrong RJ-11 port on the 
residential gateway. The residential gatewa y has two telephone ports. Verify that 
you are connected to the correct telephone port. 
   There may be a problem with your telephone set. Use a different telephone set 
and listen to hear dial tone. 
   There may be a problem with your home telephone wiring. Use a telephone and 
connect directly to the same RJ-11 port on  the back of the unit. If the dial tone is 
working here but does not work at other locations in the home, a professional 
may need to diagnose and repair a problem with your telephone wiring. 
   Verify that the phone company has remove d the previous telephone service from 
your home telephone wiring. 
Your telephone service may not be enab led from your cable telephony service 
provider. Contact your cable telephony se rvice provider for more information.  
						

							
4028315 Rev A    103  
  Tips for Improved Performance
   
Tips for Improved Performance 
Check and Correct 
If your residential gateway does not perform as expected, the following tips may 
help. If you need further assistanc e, contact your service provider. 
   Verify that the plug to your residentia l gateway AC power is properly inserted 
into an electrical outlet. 
   Verify that your residential gateway AC power cord is not plugged into an 
electrical outlet that is controlled by a  wall switch. If a wall switch controls the 
electrical outlet, make sure the switch is in the  ON position. 
   Verify that the  POWER and ONLINE  LED status indicators on the front panel of 
your residential gateway are illuminated. 
   Verify that your cable service is active  and that it supports two-way service. 
   Verify that all cables are properly conne cted, and that you are using the correct 
cables. 
   Verify that your TCP/IP is properly installed and configured if you are using the 
Ethernet connection. 
   Verify that you have called your servic e provider and given them the serial 
number and MAC address of your residential gateway. 
   If you are using a cable signal splitter so that you can connect the residential 
gateway to other devices, remove the spli tter and reconnect the cables so that the 
residential gateway is connected directly  to the cable input. If the residential 
gateway now functions properly, the cabl e signal splitter may be defective and 
may need to be replaced. 
   For best performance over an Ethernet connection, your PC should be equipped 
with a 10/100BASE-T network interface card. 
  
						

							
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Front Panel LED Status Indicator Functions   
Front Panel LED Status Indicator Functions 
Initial Power Up, Calibr ation, and Registration (AC Power applied) 
The following chart illustrates the sequ ence of steps and the corresponding 
appearance of the residential gateway fron t panel LED status indicators during 
power up, calibration, and registration on  the network when AC power is applied to 
the residential gateway. Use this chart to  troubleshoot the power up, calibration, and 
registration process of your residential gateway. 
Note:  After the residential gateway completes Step 7 (Registration Completed), the 
modem proceeds immediately to Normal Op erations. See Normal Operations (AC 
Power applied). 
 
Front Panel LED Status Indicators During Initial Power Up, Calibration, and 
Registration 
 Part 1, High Speed Data Registration 
Step:   1  2  3  4  5  6 
Front Panel 
Indicator Self 
Test Downstream 
Scan Downstream 
Signal Lock Ranging Requesting 
IP Address Request High Speed 
Data Provisioning 
File
 
1 POWER On  On On On On On 
2 DS  On  Blinking  On  On  On  On 
3 US On Off Off Blinking On On 
4 ONLINE On Off Off Off  Off Blinking 
5 LAN1- LAN4  On On or 
Blinking  On or 
Blinking On or 
Blinking On or 
Blinking  On or  
Blinking 
6 WIRELESS  Off  On or 
Blinking On or 
Blinking On or 
Blinking On or 
Blinking  On or  
Blinking 
7 TEL 1 On Off Off Off  Off Off 
8 TEL 2 On Off Off Off  Off Off 
 
 Part 2, Telephone Registration 
Step:   7  8  9  10  11 
Front Panel 
Indicator Data 
Network 
Registration 
Complete
 
Requesting 
Telephone IP 
Address
 
Request 
Telephone 
Provisioning 
File
 
Restarting 
Voice Service Telephone 
Registration 
Complete
 
1 POWER On On On  On On 
2 DS On On On  On On 
3 US On On On  On On 
4 ONLINE On On On  On On 
5 LAN1-
LAN4  On or 
Blinking  On or Blinking  On or Blinking  On or Blinking  On or Blinking 
6  WIRELESS  On or  
Blinking On or  
Blinking  On or  
Blinking  On or  
Blinking On or Blinking 
7 TEL 1 Off  Blinking Off  Blinking On 
8 TEL 2  Off  Off  Blinking  Blinking  On   
						

							
 
4028315 Rev A    105  
  Front Panel LED Status Indicator Functions
   
Normal Operations  (AC Power applied) 
The following chart illustrates the appearanc e of the residential gateway front panel 
LED status indicators during normal oper ations when AC power is applied to the 
gateway. 
 
Front Panel LED Status Indicators During Normal Conditions 
Front Panel Indicator  Normal Operations 
1 POWER  On 
2 DS  On 
3 US  On 
4 ONLINE  On 
5 LAN1-LAN4 ƒ  On - When a single device is connected to the Ethernet port 
and no data is being sent to or from the modem 
ƒ Blinks - When only one Ethernet device is connected and 
data is being transferred between the consumer premise 
equipment (CPE) and the wireless home gateway 
ƒ Off - When no devices are connected to the Ethernet ports 
6 WIRELESS ƒ On - When the wireless access point is enabled and 
operational 
ƒ Blinks - When data is being transferred between the CPE 
and the wireless home gateway 
ƒ Off - When the wireless access point is disabled by the user 
7 TEL 1 ƒ On - When telephony service is enabled 
ƒ Blinks - When line 1 is in use 
8 TEl 2 ƒ On - When telephony service is enabled 
ƒ Blinks - When line 2 is in use    
						

							
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Front Panel LED Status Indicator Functions   
Special Conditions 
The following chart describes the appearance of the cable modem front panel LED 
status indicators during special conditio ns to show when you have been denied 
network access. 
 
Front Panel LED Status Indicators During Special Conditions 
Front Panel Indicator  Network Access Denied 
1 POWER  Slow Blinking 
1 time per second 
2 DS  Slow Blinking 
1 time per second 
3 US  Slow Blinking 1 time per second 
4 ONLINE  Slow Blinking 
1 time per second 
5 LAN1-LAN4  Slow Blinking 1 time per second 
6 WIRELESS  On 
7 TEL 1  Off 
8 TEL 2  Off 
 
  
						

							
4028315 Rev A    107  
  For Information
 
 
 
For Information 
If You Have Questions 
If you have technical questions, contac
t your local cable service provider. 
  
						

							
108    4028315 Rev A  
Notices   
Notices 
Trademarks 
Cisco, Cisco Systems, the Cisco logo, the Ci sco Systems logo, Scientific Atlanta, and 
SciCare are registered tradem arks or trademarks of Cisco Systems, Inc. and/or its 
affiliates in the U.S. and certain other countries. 
DOCSIS and EuroDOCSIS are registered  trademarks of Cable Television 
Laboratories, Inc. 
PacketCable and EuroPacketCable are tradem arks of Cable Television Laboratories, 
Inc. 
Other trademarks mentioned in this document  are the property of their respective owners. 
Disclaimer 
Cisco Systems, Inc. assumes no responsi bility for errors or omissions that may 
appear in this guide. We reserve the right  to change this guide at any time without 
notice. 
Documentation Copyright Notice 
Information in this document is subject to  change without notice. No part of this 
document may be reproduced in any form  without the express written permission of 
Cisco Systems, Inc.  
Software and Firmware Use 
The software described in this docume nt is protected by copyright law and 
furnished to you under a license agreement.  You may only use or copy this software 
in accordance with the terms of your license agreement. 
The firmware in this equipment is protecte d by copyright law. You may only use the 
firmware in the equipment in which it is  provided. Any reproduction or distribution 
of this firmware, or any portion of it , without our express written consent is 
prohibited. 
FCC Radiation Exposure Statement 
This equipment complies with FCC radiation exposure limits set forth for an 
uncontrolled environment. To maintain  compliance with the FCC RF exposure 
guidelines, this equipment should be inst alled and operated with minimum distance 
of at least 7.8 in. (20cm) from all persons. 
  
						

							
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service Provider Video Technology Group  
5030 Sugarloaf Parkway, Box 465447 
Lawrenceville, GA 30042   678.277.1000 
 www.scientificatlanta.com 
This document includes various trademarks of Cisco Systems, Inc. Please see the Notices 
section of this document for a list of the Cisco Systems, Inc., trademarks used in this 
document.. 
 
Product and service availability are subject to change without notice. 
© 2008 Cisco Systems, Inc. All rights reserved.
   Printed in United States of America
 
 
November 2008       Part Number 
 4028315 Rev A