SIP-I/SIP-T

Session Initiation Protocol with encapsulated ISUP, which is known as SIP-I, specifies the criteria for enabling ISUP networks to work with SIP networks. SIP-I is an extension to an existing SIP protocol and transports ISUP specific messages over a SIP network.

Supported SIP-I Specification

TelcoBridges supports the Profile C (SIP-I) of ITU Q.1912.5.

The following items are not supported:

• Precondition (RFC3312)
• Reception of INVITE without SDP
• SIP-I digit overlap
• SUS/RES ISUP message to SIP INFO message

TelcoBridges and SIP-I

SIP-I support starts from release 2.6.23. Please refer to TMG-CONTROL version 2.6

Configuration

• SIP-I is enabled in a per-NAP basis.

Toolpack v2.6: SIP Advance Features

External Sources

• ITU Q.1912.5 Interworking between SIP and BICC/ISUP