Cisco Cisco IOS Software Release 12.4(9)T

 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a 
specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. 
Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images 
support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to 

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 lists only the Cisco IOS software release that introduced support for a given feature in a given 

Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS 
software release train also support that feature.

PVDM2-12DM, PVDM2-24DM, 
PVDM2-36DM

12.4(9)T

This feature consists of digital modems in a PVDM2 
package. Three models are available with different numbers 
of modems in the package: 12 modems, 24 modems, and 36 
modems.

Digital Modem Support and Modem Resource 
Pooling

12.4(11)XW 
12.4(20)T

Provides support on certain HWIC and VIC interface cards. 
Provides modem pooling and modem recovery features.

The following section provides information about HWIC 
and VIC support:

The following section provides information about the 
modem pooling feature:

The following section provides information about the 
modem recovery feature: