Cisco Cisco IOS Software Release 12.1(5)XM
1
Cisco IOS Release 12.1(5)XM2
Service Provider Features for Voice over IP
Feature History
This document describes the Service Provider features for Voice over IP (VoIP) that were introduced in
Cisco IOS Release 12.0(3)T. This document contains the following sections:
Cisco IOS Release 12.0(3)T. This document contains the following sections:
Feature Overview
The Cisco voice Service Provider features include enhancements made to the functionality and
configuration of both the gateway and the Voice over IP (VoIP) gatekeeper. The architecture of these
features provides the Quality of Service (QoS), stability, and functionality necessary for carrier class,
real-time IP communications services.
configuration of both the gateway and the Voice over IP (VoIP) gatekeeper. The architecture of these
features provides the Quality of Service (QoS), stability, and functionality necessary for carrier class,
real-time IP communications services.
This document contains a basic description of the H.323 VoIP gateway in addition to features required
to implement the applications to run VoIP in a service provider environment. The features address the
service provider needs to offer security, billing, scaling, and reliability.
to implement the applications to run VoIP in a service provider environment. The features address the
service provider needs to offer security, billing, scaling, and reliability.
The VoIP gateway is a high performance H.323-compliant gateway optimized for VoIP applications.
Supporting up to two T1/E1 digital channels, it connects with existing telephones and fax machines
through the Public Switched Telephone Network (PSTN), key systems, and PBXs, making the process
of placing calls over the IP network transparent to users.
Supporting up to two T1/E1 digital channels, it connects with existing telephones and fax machines
through the Public Switched Telephone Network (PSTN), key systems, and PBXs, making the process
of placing calls over the IP network transparent to users.
The gateway capability allows the access device to function as an H.323 endpoint. Therefore, the
gateway provides admission control, address lookup and translation, and accounting services.
gateway provides admission control, address lookup and translation, and accounting services.
The gatekeeper manages H.323 endpoints in a consistent manner, allowing them to register with the
gatekeeper and to locate another gatekeeper. The gatekeeper provides logic variables for proxies or
gateways in a call path to provide connectivity with the PSTN, to improve QoS, and to enforce security
policies. Multiple gatekeepers may be configured to communicate with one another, either by
integrating their addressing into Domain Naming System (DNS), or via Cisco IOS configuration
options.
gatekeeper and to locate another gatekeeper. The gatekeeper provides logic variables for proxies or
gateways in a call path to provide connectivity with the PSTN, to improve QoS, and to enforce security
policies. Multiple gatekeepers may be configured to communicate with one another, either by
integrating their addressing into Domain Naming System (DNS), or via Cisco IOS configuration
options.
For complete information about the gatekeeper functionality, refer to the Cisco Product Documentation
at the following Cisco Connection Online location:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113na/1137na/mcm_cfg.htm
at the following Cisco Connection Online location:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113na/1137na/mcm_cfg.htm
Release
Modifications
12.0(3)T
This feature was introduced.
12.1(5)XM2
Support was added for the Cisco AS5350 and Cisco AS5400
universal gateways.
universal gateways.