для Cisco Cisco IOS Software Release 12.4(2)XB6

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

Cisco IOS software images are specific to a Cisco IOS software release, a feature set, and a platform. 
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on 
Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear.

The following table lists only the Cisco IOS software release that introduced support for a given feature 
in a given Cisco IOS software release. Unless noted otherwise, subsequent releases of that Cisco IOS 
software release also support that feature.

multi-level precedence and preemption (MLPP)—A service that allows placement of priority calls. 
Precedence designates the priority level that is associated with a call. Preemption designates the process 
of terminating lower-precedence calls so that a call of higher precedence can be extended.

See 

 for terms not included in this glossary.

Copyright ©2006 Cisco Systems, Inc. All rights reserved.

12.4(4)XC

This feature was introduced.

12.4(9)T

This feature was integrated into Cisco IOS Release 12.4(9)T.

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y

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y

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