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Understanding Interface Numbering and

Cisco IOS Software Basics

This chapter provides an overview of interface numbering in the Cisco VG202 and Cisco VG204 voice

gateways (VG). It also describes how to use the Cisco IOS software commands.

This chapter presents the following major topics:

•

Cisco VG202 and Cisco VG204 voice gateways deliver analog voice gateways for the service provider

as well as commercial and enterprise unified communication markets. Both voice gateways provide

voice connectivity to devices such as analog phones, fax machines and modems.

Cisco VG202 and Cisco VG204 voice gateways provide support for 2-FXS (Cisco VG202) and 4-FXS

(Cisco VG204) ports, each supporting independent telephone numbers giving you two or four separate

lines, and parity with Cisco IOS fax/modem, security, and Session Initiation Protocol (SIP) features.

Both voice gateways are configurable with Cisco Unified Communications Manager (CUCM).

Note

Cisco VG202 and Cisco VG204 voice gateways are fixed voice gateways and do not support interface

cards.

Note

Your Cisco IOS software release may not support all of the features documented in this document. For

the latest feature information and caveats, see the release notes for your platform and software release.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS

Note

software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An

account on Cisco.com is not required.

OL-16191-01

Identifying the Cisco VG202 and Cisco VG204 Voice Gateways, page 1-1

Port Numbering Conventions, page 1-3

Understanding Cisco IOS Software Basics, page 1-4

Upgrading to a New Cisco IOS Release, page 1-6

Where to Go Next, page 1-7

Cisco VG202 and Cisco VG204 Voice Gateways Software Configuration Guide

C H A P T E R

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