Cisco DPC2420 User manual

4021194 Rev A
Cisco Model DPC2420 and EPC2420
Wireless Residential Gateway with
Embedded Digital Voice Adapter
User Guide

Please Read
Important
Please read this entire guide. If this guide provides installation or operation
instructions, give particular attention to all safety statements included in this guide.

Notices
Trademark Acknowledgments
Cisco, Cisco Systems, the Cisco logo, and the Cisco Systems logo are registered
trademarks or trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S.
and certain other countries.
DOCSIS is a registered trademark of Cable Television Laboratories, Inc.
EuroDOCSIS, EuroPacketCable, and PacketCable are trademarks of Cable
Television Laboratories, Inc.
Wi-Fi Protected Setup is a trademark of the Wi-Fi Alliance.
All other trademarks mentioned in this document are the property of their respective
owners.
Publication Disclaimer
Cisco Systems, Inc. assumes no responsibility for errors or omissions that may
appear in this publication. We reserve the right to change this publication at any
time without notice. This document is not to be construed as conferring by
implication, estoppel, or otherwise any license or right under any copyright or
patent, whether or not the use of any information in this document employs an
invention claimed in any existing or later issued patent.
Software and Firmware Use
The software described in this document 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 protected 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.

Copyright
© 2010 Cisco Systems, Inc. All rights reserved. Printed in the United States of
America.
Information in this publication is subject to change without notice. No part of this
publication may be reproduced or transmitted in any form, by photocopy,
microfilm, xerography, or any other means, or incorporated into any information
retrieval system, electronic or mechanical, for any purpose, without the express
permission of Cisco Systems, Inc.

Notice to Installers
The servicing instructions in this notice are for use by qualified service personnel only. To reduce the
risk of electric shock, do not perform any servicing other than that contained in the operating
instructions, unless you are qualified to do so.
Notice à l’attention des installateurs de réseaux câblés
Les instructions relatives aux interventions d’entretien, fournies dans la présente notice, s’adressent
exclusivement au personnel technique qualifié. Pour réduire les risques de chocs électriques, n’effectuer
aucune intervention autre que celles décrites dans le mode d'emploi et les instructions relatives au
fonctionnement, à moins que vous ne soyez qualifié pour ce faire.

Mitteilung für CATV-Techniker
Die in dieser Mitteilung aufgeführten Wartungsanweisungen sind ausschließlich für qualifiziertes
Fachpersonal bestimmt. Um die Gefahr eines elektrischen Schlags zu reduzieren, sollten Sie keine
Wartungsarbeiten durchführen, die nicht ausdrücklich in der Bedienungsanleitung aufgeführt sind,
außer Sie sind zur Durchführung solcher Arbeiten qualifiziert.
Aviso a los instaladores de sistemas CATV
Las instrucciones de reparación contenidas en el presente aviso son para uso exclusivo por parte de
personal de mantenimiento cualificado. Con el fin de reducir el riesgo de descarga eléctrica, no realice
ninguna otra operación de reparación distinta a las contenidas en las instrucciones de funcionamiento, a
menos que posea la cualificación necesaria para hacerlo.
20080814_Installer820_Intl

4021194 Rev A iii
Contents
IMPORTANT SAFETY INSTRUCTIONS v
United States FCC Compliance viii
CE Compliance x
About This Guide xiii
Chapter 1 Introducing the DOCSIS Residential Gateway 1
Introduction .............................................................................................................................. 2
What's In the Carton? .............................................................................................................. 3
Front Panel Description .......................................................................................................... 4
Back Panel Description............................................................................................................ 5
Chapter 2 Installing the DOCSIS Residential Gateway 7
Installation Preparations......................................................................................................... 8
Install the Residential Gateway ........................................................................................... 17
Chapter 3 Configuring the DOCSIS Residential Gateway 21
Log in to the DOCSIS Residential Gateway for the First Time .......................................22
Configure Basic Settings ....................................................................................................... 25
Configure Advanced Settings .............................................................................................. 45
Configure Firewall Settings.................................................................................................. 67
Configure Parental Control Settings ...................................................................................71
Configure Wireless Settings ................................................................................................. 80
Chapter 4 Operation of Front Panel Indicators 95
Initial Power Up, Calibration, and Registration (AC Power applied)............................96
Normal Operations (AC Power Applied) .......................................................................... 98
Special Conditions ................................................................................................................. 99

Contents
iv 4021194 Rev A
Chapter 5 Troubleshooting the DOCSIS Residential Gateway 101
Frequently Asked Questions.............................................................................................. 102
Common Troubleshooting Issues...................................................................................... 108
Tips for Improved Performance ........................................................................................110
Chapter 6 Customer Information 111
Customer Support................................................................................................................ 112
Index 115

IMPORTANT SAFETY INSTRUCTIONS
4021194 Rev A v
IMPORTANT SAFETY INSTRUCTIONS
1)
Read these instructions.
2)
Keep these instructions.
3)
Heed all warnings.
4)
Follow all instructions.
5)
Do not use this apparatus near water.
6)
Clean only with dry cloth.
7)
Do not block any ventilation openings. Install in accordance with the manufacturer's
instructions.
8)
Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce heat.
9)
Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding-type
plug has two blades and a third grounding prong. The wide blade or the third
prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
10)
Protect the power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11)
Only use attachments/accessories specified by the manufacturer.
12)
Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from
tip-over.
13)
Unplug this apparatus during lightning storms or when unused for long periods of
time.
14)
Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as a power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.
Power Source Warning
A label on this product indicates the correct power source for this product. Operate this product only
from an electrical outlet with the voltage and frequency indicated on the product label. If you are
uncertain of the type of power supply to your home or business, consult your service provider or your
local power company.
The AC inlet on the unit must remain accessible and operable at all times.
Ground the Product
WARNING: Avoid electric shock and fire hazard! If this product connects to coaxial
cable wiring, be sure the cable system is grounded (earthed). Grounding provides
some protection against voltage surges and built-up static charges.

IMPORTANT SAFETY INSTRUCTIONS
vi 4021194 Rev A
Protect the Product from Lightning
In addition to disconnecting the AC power from the wall outlet, disconnect the signal inputs.
Verify the Power Source from the On/Off Power Light
When the on/off power light is not illuminated, the apparatus may still be connected to the power
source. The light may go out when the apparatus is turned off, regardless of whether it is still plugged
into an AC power source.
Eliminate AC Mains Overloads
WARNING: Avoid electric shock and fire hazard! Do not overload AC mains, outlets,
extension cords, or integral convenience receptacles. For products that require battery
power or other power sources to operate them, refer to the operating instructions for
those products.
Provide Ventilation and Select a Location
Remove all packaging material before applying power to the product.
Do not place this apparatus on a bed, sofa, rug, or similar surface.
Do not place this apparatus on an unstable surface.
Do not install this apparatus in an enclosure, such as a bookcase or rack, unless the installation
provides proper ventilation.
Do not place entertainment devices (such as VCRs or DVDs), lamps, books, vases with liquids, or
other objects on top of this product.
Do not block ventilation openings.
Protect from Exposure to Moisture and Foreign Objects
WARNING: Avoid electric shock and fire hazard! Do not expose this product to
dripping or splashing liquids, rain, or moisture. Objects filled with liquids, such as
vases, should not be placed on this apparatus.
WARNING: Avoid electric shock and fire hazard! Unplug this product before cleaning.
Do not use a liquid cleaner or an aerosol cleaner. Do not use a magnetic/static cleaning
device (dust remover) to clean this product.
WARNING: Avoid electric shock and fire hazard! Never push objects through the
openings in this product. Foreign objects can cause electrical shorts that can result in
electric shock or fire.
Service Warnings
WARNING: Avoid electric shock! Do not open the cover of this product. Opening or
removing the cover may expose you to dangerous voltages. If you open the cover, your
warranty will be void. This product contains no user-serviceable parts.

IMPORTANT SAFETY INSTRUCTIONS
4021194 Rev A vii
Check Product Safety
Upon completion of any service or repairs to this product, the service technician must perform safety
checks to determine that this product is in proper operating condition.
Protect the Product When Moving It
Always disconnect the power source when moving the apparatus or connecting or disconnecting
cables.
Telephone Equipment Notice
When using your telephone equipment, basic safety precautions should always be followed to reduce
the risk of fire, electric stock and injury to persons, including the following:
1. 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.
2. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a
remote risk of electric shock from lightning.
3. Do not use the telephone to report a gas leak in the vicinity of the leak.
CAUTION: To reduce the risk of fire, use only No. 26 AWG or larger
telecommunication line cord.
SAVE THESE INSTRUCTIONS
20090915_Modem No Battery_Safety

United States FCC Compliance
viii 4021194 Rev A
United States FCC Compliance
This device has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against such interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy. If not installed and used in accordance with the
instructions, it may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be determined by
turning the equipment 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 service provider or an experienced radio/television technician for help.
Any changes or modifications not expressly approved by Cisco Systems, Inc., could void the
user's authority to operate the equipment.
The information shown in the FCC Declaration of Conformity paragraph below is a
requirement of the FCC and is intended to supply you with information regarding the FCC
approval of this device. The phone numbers listed are for FCC-related questions only and not
intended for questions regarding the connection or operation for this device. Please contact your
service provider for any questions you may have regarding the operation or installation of this device.
Declaration of Conformity
This device complies with Part 15 of FCC
Rules. Operation is subject to the following
two conditions: 1) the device may not cause
harmful interference, and 2) the device must
accept any interference received, including
interference that may cause undesired
operation.
DOCSIS Residential Gateway
Model(s): DPC2420 EPC2420
Manufactured by:
Cisco Systems, Inc.
5030 Sugarloaf Parkway
Lawrenceville, Georgia 30044 USA
Telephone: [phone]
Canada EMI Regulation
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la class B est conforme à la norme NMB-003 du Canada.
Dynamic Frequency Selection (DFS) Dual Band Frequencies
Some configurations of this product may operate in the 5150-5250 MHz and 5470-5725 MHz
bands. If you select any channel in these frequency ranges, the product is restricted to indoor
operation only per FCC guidance. The use of this product on the affected frequencies when
outside is in non compliance of the FCC regulations and guidelines.

United States FCC Compliance
4021194 Rev A ix
RF Exposure Statements
Note: This transmitter must not be co-located or operated in conjunction with any other
antenna or transmitter. This equipment should be installed and operated with a minimum
distance of 7.9 inches (20 cm) between the radiator and your body.
US
This system has been evaluated for RF exposure for humans in reference to ANSI C 95.1
(American National Standards Institute) limits. The evaluation was based in accordance with
FCC OET Bulletin 65C rev 01.01 in compliance with Part 2.1091 and Part 15.27. The minimum
separation distance from the antenna to general bystander is 7.9 inches (20 cm) to maintain
compliance.
Canada
This system has been evaluated for RF exposure for humans in reference to Canada Health
Code 6 (2009) limits. The evaluation was based on evaluation per RSS-102 Rev 4. The
minimum separation distance from the antenna to general bystander is 7.9 inches (20 cm) to
maintain compliance.
EU
This system has been evaluated for RF exposure for humans in reference to the ICNIRP
(International Commission on Non-Ionizing Radiation Protection) limits. The evaluation was
based on the EN 50385 Product Standard to Demonstrate Compliance of Radio Base Stations
and Fixed Terminals for Wireless Telecommunications Systems with basic restrictions or
reference levels related to Human Exposure to Radio Frequency Electromagnetic Fields from
300 MHz to 40 GHz. The minimum separation distance from the antenna to general
bystander is 20 cm (7.9 inches).
Australia
This system has been evaluated for RF exposure for humans as referenced in the Australian
Radiation Protection standard and has been evaluated to the ICNIRP (International
Commission on Non-Ionizing Radiation Protection) limits. The minimum separation distance
from the antenna to general bystander is 20 cm (7.9 inches).
20091016 FCC DSL_Dom and Intl

CE Compliance
x 4021194 Rev A
CE Compliance
Declaration of Conformity with Regard to the EU Directive 1999/5/EC
(R&TTE Directive)
This declaration is only valid for configurations (combinations of software, firmware and
hardware) supported or provided by Cisco Systems for use within the EU. The use of
software or firmware not supported or provided by Cisco Systems may result in the
equipment no longer being compliant with the regulatory requirements.

CE Compliance
4021194 Rev A xi
Note: The full declaration of conformity for this product can be found in the Declarations of
Conformity and Regulatory Information section of the appropriate product hardware
installation guide, which is available on Cisco.com.
The following standards were applied during the assessment of the product against the
requirements of the Directive 1999/5/EC:
EMC: EN 55022 and EN 55024
EN 61000-3-2 and EN 61000-3-3
Safety: EN 60950-1
This product conforms to the following European directives:
-1999/5/EC
20090724 CE_Modem/EMTA

About This Guide
4021194 Rev A xiii
About This Guide
Introduction
Welcome. This guide provides instructions and recommendations for placing,
installing, configuring, operating, maintaining, and troubleshooting the DPC2420
and EPC2420 DOCSIS Residential Gateways.
Purpose
This guide covers the following product models:
DPC2420 DOCSIS Residential Gateway
EPC2420 DOCSIS Residential Gateway
All features described in this guide are standard to these models of residential
gateways unless otherwise noted. For the purpose of this guide, whenever a feature
or option applies to only a specific model, the model number is specified. If a model
number is not specified, then the feature or option applies to both of the models.
Audience
This guide is written for the home subscriber.
Document Version
This is the first formal release of this document.