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Chapter 6, “Configuring Telephone Interfaces”—Describes how to configure 
standard and advanced features for the Cisco 800 series routers that support 
telephone features. 
Chapter 7, “Router Feature Configuration”—Explains basic router 
configuration, feature by feature. 
Chapter 8, “Advanced Router Configuration”—Explains advanced router 
configuration features.
Chapter 9, “Troubleshooting”—Provides information on identifying and 
solving problems with the ADSL line and the telephone interface. Also 
explains how to recover a lost software password.
Appendix A, “Cisco IOS Basic Skills”—Explains what you need to know 
about the Cisco IOS software before you begin to configure it.
Appendix B, “ROM Monitor”—Describes the use of the ROM Monitor 
(ROMMON) utility.
Appendix C, “Common Port Assignments”—Describes the currently 
assigned Transmission Control Protocol (TCP) and User Datagram Protocol 
(UDP) port numbers.
Appendix D, “Provisioning an ISDN Line”—Describes ISDN lines and 
switches and the features available, and tells how to order an ISDN line.
Appendix E, “ISDN BRI Cause Values”—Describes ISDN BRI standard 
cause values that might be received from the ISDN switch to indicate ISDN 
call status.
Conventions
This guide uses the following conventions for instructions and information.
Notes, Cautions, and Timesavers
Notes, cautions, and time-saving tips use the following conventions and symbols.
NoteMeans reader take note. Notes contain helpful suggestions or references to 
materials not contained in this manual. 
						

							 
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CautionThis caution symbol means reader be careful. In this situation, you might do 
something that could result in equipment damage or loss of data.
TimesaverThis symbol means the described action saves time. 
Command Conventions
Ta b l e 1 describes the command syntax used in this document.
Table 1 Conventions
Convention Description
boldfaceCommands and keywords.
italicCommand input that is supplied by you.
[ ] Optional keywords and default responses to system 
prompts appear within square brackets.
{x|x|x} A choice of keywords (represented by x) appears in 
braces separated by vertical bars. You must select 
one.
^ or Ctrl Represent the key labeled Control. For example, 
when you read ^D or Ctrl-D, you should hold down 
the Control key while you press the D key.
screen fontExamples of information displayed on the screen.
boldface screen 
fontExamples of information that you must enter. 
						

							 
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Related Documents
The following publications provide related information on these products:
Cisco 800 series routers
–Cisco 800 Series Router Cabling and Setup Quick Start Guide—Provides 
quick installation information on the Cisco 801–804 routers.
–Cisco 800 Series Routers Hardware Installation Guide—Provides 
installation information on the Cisco 801–804 routers.
Cisco 805 router
–Cisco 805 Router Cabling and Setup Quick Start Guide—Provides quick 
installation information on the Cisco 805 router.
–Cisco 805 Router Hardware Installation Guide—Provides installation 
information on the Cisco 805 router.
Cisco 806 router
–Cisco 806 Router Cabling and Setup Quick Start Guide—Provides quick 
installation information on the Cisco 806 router. 
–Cisco 806 Router Hardware Installation Guide—Provides installation 
information on the Cisco 806 router.
Cisco 811 and 813 routers
–Cisco 811 and 813 Router Cabling and Setup Quick Start 
Guide—Provides quick installation information on the Cisco 811 and 
813 routers. 
–Cisco 811 and 813 Router Hardware Installation Guide—Provides 
installation information on the Cisco 806 router.
Cisco 826 router
–Cisco 826 Routers Hardware Installation Guide—Provides installation 
information on the Cisco 826 routers.
–Cisco 826 and Cisco SOHO 76 Router Quick Start Guide—Provides 
quick installation information on the Cisco 826 router. 
						

							 
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Cisco 827 router
–Cisco 827 Routers Hardware Installation Guide—Provides installation 
information on the Cisco 827 routers. 
–Cisco 827 Router Cabling and Setup Quick Start Guide—Provides quick 
installation information on the Cisco 827 routers.
Cisco 828 and Cisco SOHO 78 routers
–Cisco 828 and SOHO 78 Cabling and Setup Quick Start 
Guide—Provides quick installation information on the Cisco 828 and 
Cisco SOHO 78 routers.
–Cisco 828 and SOHO 78 Routers Hardware Installation 
Guide—Provides installation information on the Cisco 828 and 
Cisco SOHO 78 routers. 
Cisco SOHO 77 router
–Configuration Note for Cisco SOHO Series Routers—Describes software 
configuration information for the Cisco small office/home office 
(SOHO) 77 router. For information on hardware installation, refer to the 
Cisco 827 Routers Hardware Installation Guide.
Cisco 831 and Cisco SOHO 91 routers 
–Cisco 831 and SOHO 91 Cabling and Setup Quick Start 
Guide—Provides quick installation information on the Cisco 831 and 
Cisco SOHO 91 routers. 
–Cisco 831 and SOHO 91 Hardware Installation Guide—Provides 
installation information on the Cisco 831 and Cisco SOHO 91 routers. 
Cisco 836 and Cisco SOHO 96 routers
–Cisco 836 and SOHO 96 Cabling and Setup Quick Start 
Guide—Provides quick installation information on the Cisco 836 and 
Cisco SOHO 96 routers.
–Cisco 831 and SOHO 91 Hardware Installation Guide—Provides 
installation information on the Cisco 836 and Cisco SOHO 96 routers. 
						

							 
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Cisco 837 and Cisco SOHO 97 routers 
–Cisco 837 and SOHO 97 Cabling and Setup Quick Start 
Guide—Provides quick installation information on the Cisco 837 and 
Cisco SOHO 97 routers. 
–Cisco 837 and SOHO 97 Hardware Installation Guide—Provides 
installation information on the Cisco 837 and Cisco SOHO 97 routers. 
Cisco documentation and additional literature are available in a CD-ROM 
package, which ships with your product. The Documentation CD-ROM, a 
member of the Cisco Connection Family, is updated monthly. Therefore, it might 
be more current than printed documentation. To order additional copies of the 
Documentation CD-ROM, contact your local sales representative or call customer 
service. The CD-ROM package is available as a single package or as an annual 
subscription. You can also access Cisco documentation on the World Wide Web 
at http://www.cisco.com, http://www-china.cisco.com, or 
http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can 
submit comments electronically. Click Feedback in the toolbar and select 
Documentation. After you complete the form, click Submit to send it to Cisco. 
We appreciate your comments.
References to Cisco IOS Documentation Set
This guide contains several references to the Cisco IOS documentation set. You 
can access the desired information in the following ways:
On the Documentation CD-ROM, select Cisco Product Documentation, 
select Cisco IOS Software Configuration, click on the IOS release number 
applicable to your installation. From there, you can browse to and review the 
alphabetical listings to find the feature.
On CCO, go to Software and Support, and select Documentation. Next, 
select Cisco Product Documentation, select Cisco IOS Software 
Configuration, click on the IOS release number applicable to your 
installation. From there, you can browse to and review the alphabetical 
listings to find the feature. 
						

							 
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Obtaining Documentation
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Obtaining Documentation
Cisco provides several ways to obtain documentation, technical assistance, and 
other technical resources. These sections explain how to obtain technical 
information from Cisco Systems.
Cisco.com
You can access the most current Cisco documentation on the World Wide Web at 
this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
http://www.cisco.com
International Cisco web sites can be accessed from this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco 
Documentation CD-ROM package, which may have shipped with your product. 
The Documentation CD-ROM is updated monthly and may be more current than 
printed documentation. The CD-ROM package is available as a single unit or 
through an annual subscription.
Registered Cisco.com users can order the Documentation CD-ROM (product 
number DOC-CONDOCCD=) through the online Subscription Store:
http://www.cisco.com/go/subscription
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm 
						

							 
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Obtaining Technical Assistance
You can order Cisco documentation in these ways:
Registered Cisco.com users (Cisco direct customers) can order Cisco product 
documentation from the Networking Products MarketPlace:
http://www.cisco.com/en/US/partner/ordering/index.shtml
Registered Cisco.com users can order the Documentation CD-ROM 
(Customer Order Number DOC-CONDOCCD=) through the online 
Subscription Store:
http://www.cisco.com/go/subscription
Nonregistered Cisco.com users can order documentation through a local 
account representative by calling Cisco Systems Corporate Headquarters 
(California, U.S.A.) at 408 526-7208 or, elsewhere in North America, by 
calling 800 553-NETS (6387). 
Documentation Feedback
You can submit comments electronically on Cisco.com. On the Cisco 
Documentation home page, click Feedback at the top of the page.
You can e-mail your comments to [email protected].
You can submit your comments by mail by using the response card behind the 
front cover of your document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com, which includes the Cisco Technical Assistance Center 
(TAC) Website, as a starting point for all technical assistance. Customers and 
partners can obtain online documentation, troubleshooting tips, and sample 
configurations from the Cisco TAC website. Cisco.com registered users have 
complete access to the technical support resources on the Cisco TAC website, 
including TAC tools and utilities.  
						

							 
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Cisco.com
Cisco.com offers a suite of interactive, networked services that let you access 
Cisco information, networking solutions, services, programs, and resources at any 
time, from anywhere in the world. 
Cisco.com provides a broad range of features and services to help you with these 
tasks:
Streamline business processes and improve productivity 
Resolve technical issues with online support
Download and test software packages
Order Cisco learning materials and merchandise
Register for online skill assessment, training, and certification programs
To obtain customized information and service, you can self-register on Cisco.com 
at this URL:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC is available to all customers who need technical assistance with 
a Cisco product, technology, or solution. Two levels of support are available: the 
Cisco TAC website and the Cisco TAC Escalation Center. The avenue of support 
that you choose depends on the priority of the problem and the conditions stated 
in service contracts, when applicable.
We categorize Cisco TAC inquiries according to urgency:
Priority level 4 (P4)—You need information or assistance concerning Cisco 
product capabilities, product installation, or basic product configuration.
Priority level 3 (P3)—Your network performance is degraded. Network 
functionality is noticeably impaired, but most business operations continue.
Priority level 2 (P2)—Your production network is severely degraded, 
affecting significant aspects of business operations. No workaround is 
available. 
						

							 
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Obtaining Technical Assistance
Priority level 1 (P1)—Your production network is down, and a critical impact 
to business operations will occur if service is not restored quickly. No 
workaround is available.
Cisco TAC Website
You can use the Cisco TAC website to resolve P3 and P4 issues yourself, saving 
both cost and time. The site provides around-the-clock access to online tools, 
knowledge bases, and software. To access the Cisco TAC website, go to this 
URL:
http://www.cisco.com/tac
All customers, partners, and resellers who have a valid Cisco service contract 
have complete access to the technical support resources on the Cisco TAC 
website. Some services on the Cisco TAC website require a Cisco.com login ID 
and password. If you have a valid service contract but do not have a login ID or 
password, go to this URL to register:
http://tools.cisco.com/RPF/register/register.do
If you are a Cisco.com registered user, and you cannot resolve your technical 
issues by using the Cisco TAC website, you can open a case online at this URL:
http://www.cisco.com/en/US/support/index.html
If you have Internet access, we recommend that you open P3 and P4 cases through 
the Cisco TAC website so that you can describe the situation in your own words 
and attach any necessary files.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 
issues. These classifications are assigned when severe network degradation 
significantly impacts business operations. When you contact the TAC Escalation 
Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a 
case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, 
go to this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml 
						

							 
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Before calling, please check with your network operations center to determine the 
level of Cisco support services to which your company is entitled: for example, 
SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). When 
you call the center, please have available your service agreement number and your 
product serial number.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is 
available from various online and printed sources.
The Cisco Product Catalog describes the networking products offered by 
Cisco Systems as well as ordering and customer support services. Access the 
Cisco Product Catalog at this URL:
http://www.cisco.com/en/US/products/products_catalog_links_launch.html
Cisco Press publishes a wide range of networking publications. Cisco 
suggests these titles for new and experienced users: Internetworking Terms 
and Acronyms Dictionary, Internetworking Technology Handbook, 
Internetworking Troubleshooting Guide, and the Internetworking Design 
Guide. For current Cisco Press titles and other information, go to Cisco Press 
online at this URL:
http://www.ciscopress.com
Packet magazine is the Cisco monthly periodical that provides industry 
professionals with the latest information about the field of networking. You 
can access Pa c k e t magazine at this URL:
http://www.cisco.com/en/US/about/ac123/ac114/about_cisco_packet_maga
zine.html
iQ Magazine is the Cisco monthly periodical that provides business leaders 
and decision makers with the latest information about the networking 
industry. You can access iQ Magazine at this URL:
http://business.cisco.com/prod/tree.taf%3fasset_id=44699&public_view=tru
e&kbns=1.html
Internet Protocol Journal is a quarterly journal published by Cisco Systems 
for engineering professionals involved in the design, development, and 
operation of public and private internets and intranets. You can access the 
Internet Protocol Journal at this URL: