Cisco Unified CallManager Express Solution Reference Network Design Guide
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Table Of Contents



Related Documents and References

Document Conventions

Obtaining Documentation

Product Documentation DVD

Ordering Documentation

Documentation Feedback

Cisco Product Security Overview

Reporting Security Problems in Cisco Products

Product Alerts and Field Notices

Obtaining Technical Assistance

Cisco Technical Support & Documentation Website

Submitting a Service Request

Definitions of Service Request Severity

Obtaining Additional Publications and Information


This document provides design considerations and guidelines for deploying Cisco Unified CallManager Express (Cisco Unified CME) in the context of standalone or distributed call control environments.

Note Some of the content used in this his publication originated as content in the Cisco Press book entitled Cisco IP Communications Express: CallManager Express with Cisco Unity Express (ISBN: 158705180X). See the following Cisco Press summary for a complete table of contents and book description:


Note This document addresses features available as of Cisco Unified CME 3.1 and later. Features that are associated only with later releases are specifically noted in the body of the publication.

This publication addresses a variety of design considerations associated with deploying Cisco Unified CME. Specific chapters presented in this design guide are as follows:

Chapter 1, "Introducing Cisco Unified Communications Express"

Chapter 2, "IP Telephony Deployment Models"

Chapter 3, "Network Infrastructure"

Chapter 4, "Voice Gateways"

Chapter 5, "Cisco Unified CallManager Express Call Transfer and Forward"

Chapter 6, "Connecting Multiple Cisco Unified CallManager Express Systems with VoIP"

Chapter 7, "Integrating Cisco Unified CallManager Express with Cisco Unified CallManager"

Chapter 8, "Integrating External Applications with Cisco Unified CallManager Express"

Chapter 9, "Cisco Unified CallManager Express Dial Plan"

Chapter 10, "Cisco Unified CallManager Express Security Best Practices"

Chapter 11, "Managing and Monitoring Cisco Unified CallManager Express Systems"

Chapter 12, "IP Telephony Endpoints for Cisco Unified CallManager Express"

Related Documents and References

For more information about topics addressed in this publication, see the Cisco documents listed in Table 1 and external websites listed in Table 2.

Table 1 Related Cisco Content by Chapter 

Cisco Public Website Links
Chapter 2

Cisco Unified CME

Large scale deployment

Chapter 3

Cisco 1800 ISR APs

Cisco 870 Integrated Service Routers (ISR) APs

Campus network design

Cisco High-speed WAN Interface Card (HWIC)-AP

Cisco IOS Wireless LAN configuration

Cisco Unified Wireless IP Phone 7920

Cisco Wireless LAN Services Module (WLSM)

Integrated Services Router (ISR) implementation limitations

Voice-Adaptive Traffic Shaping and Fragmentation

Chapter 4

Digital trunks

Chapter 6

Cisco Multiservice IP-to-IP Gateway

Chapter 8

Cisco and Microsoft implementations

Cisco Unity Express

Cisco Unity Express Design Guide

Excerpts from Cisco IP Communications Express: CallManager Express with Cisco Unity Express

CRM Communications Connector

XML development

Chapter 10

Cisco Unified CME Command Reference

Chapter 11

XML Provisioning Guide for Cisco CME/SRST

Cisco CallManager Express 3.4 SNMP MIB Support

Cisco Networking Services Configuration Engine

Cisco Unified CME QCT Data Sheet

Cisco Unified CME QCT software download site

Cisco Unified Operations Manager data sheets

Technical documentation for Cisco Unified Operations Manager

Cisco Unified Service Monitor data sheets

Technical documentation for Cisco Unified Service Monitor


Cisco developer support (limited access site)

Cisco Unified CME configuration examples

Solution Reference Network Design guides

Table 2 Recommended External Websites References

External Website Link

IP Blue



ISI Telemanagement Solutions

Integrated Research

Table 3 Standards and RFCs

External Website Link

ITU-T H-series standard

RFC 1918

Document Conventions

This guide uses the following special convention:

Table 4 Document Conventions 


The letter y used in a phone number prefix.

Represents the prefix for a telephone number. Example: 506.5yy.1234. This convention is used when phone numbers outside the range of 555-0100 to 555-0199 are required for a given example.

Obtaining Documentation

Cisco documentation and additional literature are available on This section explains the product documentation resources that Cisco offers.

You can access the most current Cisco documentation at this URL:

You can access the Cisco website at this URL:

You can access international Cisco websites at this URL:

Product Documentation DVD

The Product Documentation DVD is a library of technical product documentation on a portable medium. The DVD enables you to access installation, configuration, and command guides for Cisco hardware and software products. With the DVD, you have access to the HTML documentation and some of the PDF files found on the Cisco website at this URL:

The Product Documentation DVD is created monthly and is released in the middle of the month. DVDs are available singly or by subscription. Registered users can order a Product Documentation DVD (product number DOC-DOCDVD= or DOC-DOCDVD=SUB) from Cisco Marketplace at the Product Documentation Store at this URL:

Ordering Documentation

You must be a registered user to access Cisco Marketplace. Registered users may order Cisco documentation at the Product Documentation Store at this URL:

If you do not have a user ID or password, you can register at this URL:

Documentation Feedback

You can provide feedback about Cisco technical documentation on the Cisco Technical Support & Documentation site area by entering your comments in the feedback form available in every online document.

Cisco Product Security Overview

Cisco provides a free online Security Vulnerability Policy portal at this URL:

From this site, you will find information about how to do the following:

Report security vulnerabilities in Cisco products

Obtain assistance with security incidents that involve Cisco products

Register to receive security information from Cisco

A current list of security advisories, security notices, and security responses for Cisco products is available at this URL:

To see security advisories, security notices, and security responses as they are updated in real time, you can subscribe to the Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed. Information about how to subscribe to the PSIRT RSS feed is found at this URL:

Reporting Security Problems in Cisco Products

Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you have identified a vulnerability in a Cisco product, contact PSIRT:

For emergencies only —

An emergency is either a condition in which a system is under active attack or a condition for which a severe and urgent security vulnerability should be reported. All other conditions are considered nonemergencies.

For nonemergencies —

In an emergency, you can also reach PSIRT by telephone:

1 877 228-7302

1 408 525-6532

Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product (for example, GnuPG) to encrypt any sensitive information that you send to Cisco. PSIRT can work with information that has been encrypted with PGP versions 2.x through 9.x.

Never use a revoked encryption key or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one linked in the Contact Summary section of the Security Vulnerability Policy page at this URL:

The link on this page has the current PGP key ID in use.

If you do not have or use PGP, contact PSIRT to find other means of encrypting the data before sending any sensitive material.

Product Alerts and Field Notices

Modifications to or updates about Cisco products are announced in Cisco Field Notices. You can receive product alerts and Cisco Field Notices by using the Cisco Notification Service on This tool enables you to create a profile and choose those products for which you want to receive information.

To access the Cisco Notification Service, you must be a registered user. (To register as a user, go to this URL: Registered users can access the tool at this URL:

Obtaining Technical Assistance

Cisco Technical Support provides 24-hour-a-day award-winning technical assistance. The Cisco Technical Support & Documentation website on features extensive online support resources. In addition, if you have a valid Cisco service contract, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not have a valid Cisco service contract, contact your reseller.

Cisco Technical Support & Documentation Website

The Cisco Technical Support & Documentation website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day at this URL:

Access to all tools on the Cisco Technical Support & Documentation website requires a user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:

Note Use the Cisco Product Identification Tool to locate your product serial number before submitting a request for service online or by phone. You can access this tool from the Cisco Technical Support & Documentation website by clicking the Tools & Resources link, clicking the All Tools (A-Z) tab, and then choosing Cisco Product Identification Tool from the alphabetical list. This tool offers three search options: by product ID or model name; by tree view; or, for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.

Tip Displaying and Searching on

If you suspect that the browser is not refreshing a web page, force the browser to update the web page by holding down the Ctrl key while pressing F5.

To find technical information, narrow your search to look in technical documentation, not the entire website. On the home page, click the Advanced Search link under the Search box and then click the Technical Support & button.

To provide feedback about the website or a particular technical document, click Contacts & Feedback at the top of any web page.

Submitting a Service Request

Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco engineer. The TAC Service Request Tool is located at this URL:

For S1 or S2 service requests, or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.

To open a service request by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411
Australia: 1 800 805 227
EMEA: +32 2 704 55 55
USA: 1 800 553 2447

For a complete list of Cisco TAC contacts, go to this URL:

Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—An existing network is "down" or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operations are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of the network is impaired while most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

The Cisco Product Quick Reference Guide is a handy, compact reference tool that includes brief product overviews, key features, sample part numbers, and abbreviated technical specifications for many Cisco products that are sold through channel partners. It is updated twice a year and includes the latest Cisco channel product offerings. To order and find out more about the Cisco Product Quick Reference Guide, go to this URL:

Cisco Marketplace provides a variety of Cisco books, reference guides, documentation, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:

Cisco Press publishes a wide range of general networking, training, and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:

Packet magazine is the magazine for Cisco networking professionals. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can subscribe to Packet magazine at this URL:

Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

Networking products offered by Cisco Systems, as well as customer support services, can be obtained at this URL:

Networking Professionals Connection is an interactive website where networking professionals share questions, suggestions, and information about networking products and technologies with Cisco experts and other networking professionals. Join a discussion at this URL:

"What's New in Cisco Documentation" is an online publication that provides information about the latest documentation releases for Cisco products. Updated monthly, this online publication is organized by product category to direct you quickly to the documentation for your products. You can view the latest release of "What's New in Cisco Documentation" at this URL:

World-class networking training is available from Cisco. You can view current offerings at this URL: