Cisco Cisco IOS Software Release 12.2(11)T
Network Access Server Package for Media Gateway Control Protocol
Feature Overview
2
Cisco IOS Release 12.2(2)XB and Release 12.2(11)T
Feature Overview
This feature adds support for the Network Access Server Package for Media Gateway Control Protocol
package on the Cisco AS5350, Cisco AS5400, and Cisco AS5850 universal gateways. With this
implementation, data calls can be terminated on a trunking media gateway that is serving as a network
access server (NAS). Trunks on the NAS are controlled and managed by a call agent that supports Media
Gateway Control Protocol (MGCP) for both voice and data calls. The call agent must support the MGCP
NAS package.
package on the Cisco AS5350, Cisco AS5400, and Cisco AS5850 universal gateways. With this
implementation, data calls can be terminated on a trunking media gateway that is serving as a network
access server (NAS). Trunks on the NAS are controlled and managed by a call agent that supports Media
Gateway Control Protocol (MGCP) for both voice and data calls. The call agent must support the MGCP
NAS package.
These capabilities are enabled by the universal port functionality of the Cisco AS5350, Cisco AS5400,
and Cisco AS5850, which allows these platforms to operate simultaneously as network access servers
and voice gateways to deliver universal services on any port at any time. These universal services include
dial access, real-time voice and fax, wireless data access, and unified communications.
and Cisco AS5850, which allows these platforms to operate simultaneously as network access servers
and voice gateways to deliver universal services on any port at any time. These universal services include
dial access, real-time voice and fax, wireless data access, and unified communications.
The MGCP NAS package implements signals and events to create, modify, and tear down data calls. The
events include signaling the arrival of an outbound call (IP to Public Switched Telephone Network [PSTN])
to the media gateway controller (call agent), reporting carrier loss and call authorization status, and receiving
callback requests. The following types of calls can be terminated as data calls:
events include signaling the arrival of an outbound call (IP to Public Switched Telephone Network [PSTN])
to the media gateway controller (call agent), reporting carrier loss and call authorization status, and receiving
callback requests. The following types of calls can be terminated as data calls:
•
Data within the voice band (analog modem)
•
ISDN data (digital modem)
•
Data over voice when using a call agent that recognizes this call type and delivers these calls as
digital data to the NAS
digital data to the NAS
The NAS package provides MGCP capabilities for data calls on the Cisco AS5350, Cisco AS5400, and
Cisco AS5850 that support all the dial-in and dial-out services, including the following:
Cisco AS5850 that support all the dial-in and dial-out services, including the following:
•
Virtual Private Network (VPN) with Layer 2 Tunneling Protocol (L2TP)
•
Scalable Multichassis Multilink PPP (MMP) across multiple channels
•
MGCP 1.0 and MGCP 0.1
•
Call preauthentication with MGCP dial calls
Resource pool management can be used to manage dial ports when dialed number identification service
(DNIS) preauthentication is enabled. The NAS returns an error with a preauthentication failure code to
the call agent, which releases the call gracefully with a busy cause. Refer to the
(DNIS) preauthentication is enabled. The NAS returns an error with a preauthentication failure code to
the call agent, which releases the call gracefully with a busy cause. Refer to the
and the
, Release 12.2, for more information about
authentication, authorization, and accounting (AAA) preauthentication services.
shows a typical network topology for universal port media gateways.