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Map SS7 ISUP Messages to SIP
Map SS7 ISUP Messages to SIP
- Kelli Higdon
Owned by Kelli Higdon
ISUP Message | SIP Message |
|---|---|
Initial address message (IAM) | INVITE |
Address complete message (ACM) | 180 RINGING / 183 PROGRESS |
Answer message (ANM) | 200 OK |
Connect message (CON) | 200 OK |
Call progress message(CPG) | 183 CALL PROGRESS |
Release message (REL) | BYE/CANCEL |
Release complete message (RLC) | NA |
Reset circuit (RSC) | BYE/CANCEL (only for a call) * |
Circuit group reset message(GRS) | BYE/CANCEL (only for a call) * |
Circuit group blocking message(CGB) | BYE/CANCEL (only for a call) * |
Suspend message (SUS) | Re-Invite or INFO ** |
Resume message (RES) | Re-Invite or INFO ** |
Upon reception of an RSC/GRS/CGB message, one SIP message is sent for each call association.
** 'Re-Invite' message is sent unless SIP-T is enabled. If SIP-T is enabled then the 'INFO' message is sent.