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Cisco IOS XE Integrated Session Border Controller Configuration Guide for the Cisco ASR 1000 Series Aggregation Services Routers
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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 partiall y wild carded terminat ion
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.