для Cisco Cisco IOS Software Release 12.4(2)XB6

For information about VSAs Supported by Cisco voice products, see “VSAs Supported by Cisco Voice 
Products.”

DSP voice quality metrics can be used with Cisco MGCP call agents. A call agent (or media gateway 
controller) and softswitch are industry standard terms used to describe the network element that provides 
call control functionality to telephony and packet networks. The DSP voice quality metrics can report 
statistics for the following call agents:

The Cisco PGW 2200 in “call control mode” functions as a call agent or softswitch. 

A PSTN

 

gateway provides the interface between traditional SS7 networks or non-SS7 networks and 

networks based on Media Gateway Control Protocol (MGCP), H.323, and Session Initiation Protocol 
(SIP), including signaling, call control, and time-division multiplexing/IP (TDM/IP) gateway functions. 
The Cisco PGW 2200, coupled with Cisco media gateways, functions as a PSTN gateway.

There is a significant performance degradation on the Cisco PGW 2200 if all connected gateways have 
the DSP Voice Quality Metrics for MGCP feature enabled.
Enabling voice quality statistics on the gateway should only be performed by Cisco personnel.

The Cisco PGW 2200, in either signaling mode or call control mode, provides a robust, carrier-class 
interface between the PSTN and IP-based networks. Interworking with Cisco media gateways, the 
Cisco PGW 2200 supports a multitude of applications, including the following:

International and national transit networks 

Dial access 

Application service provider (ASP) termination 

Managed business voice applications 

Managed voice virtual private networks (VPNs) 

PSTN access for hosted and managed IP telephony 

Residential voice applications 

PSTN access for voice over broadband networks 

Network clearinghouse applications 

Centralized routing and billing for clearinghouse of IP-based networks