Cisco Systems ASR 1000 manual Extension to H.248 Audit Support

Chapter 7 H.248 Services—Signaling and Control

Extension to H.248 Audit Support

Extension to H.248 Audit Support

Extension to H.248 Audit Support adds support for DBE auditing of the Signals, ObservedEvents, and EventBuffer descriptors in any of the Add, Modify, Subtract, or AuditValue commands at any time on both sides of a media flow.

DBE Restrictions

The following are restrictions of DBE support for the Extension to H.248 Audit Support feature:

•When a termination endpoint has latched, the Signals, ObservedEvents, and EventBuffer descriptors are empty.

For information on latching, see the “IP NAPT Traversal Package and Latch and Relatch Support” section on page 8-3.

•When a termination has not yet latched, the Signals, ObservedEvents, and EventBuffer descriptors contain other descriptors; for example, the Signals descriptor can contain the descriptor for the ipnapt/latch signal.

•The DBE only supports the DTMF injection and the ipnapt/latch signals. However, the DTMF injection signal is defined as a brief signal and thus is not present in the Signals descriptor.

•The DBE does not support the lockstep mode of event reporting. Therefore, the ObservedEvents and EventBuffer descriptors will never contain events.

Extension to H.248 Termination Wildcarding Support

Extension to H.248 Termination Wildcarding Support adds support for partially wildcarded termination names, which allows a single command to replace one or more elements of a termination name with the wildcard character “*”.

The media gateway controller (MGC) can issue H.248 commands using wildcarding at any level of the Nine-Tier Termination Name Hierarchy.

For example, any of the following wildcarded termination names would be valid:

operator/sip/*/0/1023/0/*/*/*

operator/sip/*/0/1023/0/4094/*/*

*/*/*/0/1023/0/*/*/*

For more information on the Nine-Tier Termination Name Hierachy feature, see the “Nine-Tier Termination Name Hierarchy” section on page 7-7.

DBE Restrictions

The following are restrictions of DBE support for the Extension to H.248 Termination Wildcarding Support feature:

•H.248 commands supporting wildcarded termination names are limited to the AuditValue, Modify (of ServiceState), and Subtract commands.

•In the event that both the Termination ID and Context ID are wildcarded, then the Modify and Subtract commands must include an empty Audit descriptor, and must request a wildcarded response.

Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers

OL-15421-01 7-3