scope:

This standard specifies extensions to ITU-T Recommendation Q.1980.1, Narrowband Signaling Syntax (NSS) - Syntax Definition, which specifies a flexible encoding syntax of narrowband signaling information to be transferred in protocols that cannot inherently transfer such information. These extensions enable the transfer of ANSI-based narrowband signaling information by the native protocol.

Application

NSS may be used to augment SIP and H.323 signaling with one or more selected values corresponding to ISUP/BICC parameters or information elements, while minimizing redundancy between SIP/H.323 and ISUP/BICC. Compatibility mechanisms also enable the identification and inclusion of operator, vendor, or country variant data.