SIP to SIPT Overview
- Kelli Higdon
The information below pertains to Interworking between SIP and SIP-T. Use the information below to get an overview of how SIP to SIP-T operates on the IMG 2020. For configuration information, see the following links:
 Configure SIP to SIP-T Interworking
An SS7_Base license is required when utilizing the SIP to SIP-T interworking functionality.
 In the diagram below the IMG 2020 is configured to receive an incoming SIP message on Channel Group A. The message is inter-worked and SIP-T messaging is transmitted out Channel Group B. The SIP Endpoint Requiring SIP-T receives the SIP-T messages and continues to processes them. After processing the messages, the SIP Endpoint Requiring SIP-T then sends SIP-T responses back to the IMG 2020 through Channel Group B. The responses are inter-worked and transmitted out Channel Group A as SIP messaging. Each individual Channel group must be configured with a SIP-T profile for the IMG 2020 to function with SIP-T messaging. See Call Flow diagram below.
Call Flow Diagram
Use diagram above when reading Call Flow Diagram
SIP to SIP-T Message Mapping
Below is a mapping of SIP to SIP-T messages. The ISUP messages are inserted into the SIP message as a RAW API message.
SIP Message | SIP-T Message |
INVITE | INVITE (IAM) |
180 Ringing | 180 Ringing (ACM/CPG) |
183 Progress | 183 Progress (ACM/CPG) |
200 OK | 200 OK (ANM/CON) |
BYE | BYE (REL) |
200 OK BYE | 200 OK BYE (RLC) |
4xx, 5xx, 6xx | 4xx, 5xx, 6xx (REL)Â |
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