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Cisco H.323 Signaling Interface User Guide
OL-4806-01 Rev. A14
Chapter 3 Provisioning the Cisco HSI
HSI Feature Configuration
Support for the H.225 INFORMATION message is enabled by default. A crafts person can disable H.255
INFORMATION message support through a new property called Information MsgDisabled by issuing
the following MML command:
prov-add:name=sys_config_static,informationmsgdisabled = "True"
HSI Support for Tech Prefixes
The Cisco HSI now maps the '*' (asterisk, or star) and '#' (number sign, or hash) H.225 prefixes to the
PGW for H.323 to PSTN calls as follows:
• '*' to the value provisioned in ccpackage.Star
• '#' to the value provisioned in ccpackage.Hash
• The current value for ccpackage.Star is 'B'.
• The current value for ccpackage.Hash is 'A'.
The crafts person can change these values by issuing the following MML command:
prov-ed:name=ccpackage,hash='C'
Cisco HSI now maps the EISUP 'B' to '*' and 'C' to '#' (Called Party Number) for PSTN to H.323 calls.
Configuring Clear Channel on the Cisco HSI
The Clear Channel capability (identified as G.Clear or gclear in this document) enables support for both
voice and data calls on a network. However, the end applications are responsible for packet loss and error
recovery. For more information, refer to the document G.Clear, GSMFR, and G.726 Codecs and Modem
and Fax Passthrough for Cisco Universal Gateways at
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a00800b3568
.html.
Note In association with the Cisco HSI, the Cisco PGW must be running 9.5(2) patch set gs034/nn028, or
later, to use G.Clear.
The Cisco HSI interoperates with Cisco voice gateways (for example, the Cisco AS54xx series or
VISM), which advertises G.Clear capability via MGCP signaling using the following methods: G.Clear,
G.nX64, CCD. The Cisco HSI automatically selects the correct method depending on the gateway that
originates or terminates the call.
Refer to the Cisco H.323 Signaling Interface User Guide for information regarding the use of HSI MML
commands.