Source note · SS7 and carrier interworking concepts
RFC 3372 recommends the SIP INFO method for carrying mid-call ISUP signalling that does not change SIP call state.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP-T
- Subsystem
- mid-call signalling
- Deployment
- carrier
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- RFC 3372: Session Initiation Protocol for Telephones (SIP-T): Context and Architectures — RFC Editor / IETF · tier 1 standards and regulators · Section on transfer of mid-call ISUP signalling messages
Cite this note
APA
WarmTransfer. (2026, September 24). SS7 and carrier interworking concepts: source note ss7-carrier-interworking-sip-t-info-midcall. WarmTransfer. https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-sip-t-info-midcall
BibTeX
@misc{warmtransfer-claim-ss7-carrier-interworking-sip-t-info-midcall,
title = {SS7 and carrier interworking concepts: source note ss7-carrier-interworking-sip-t-info-midcall},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-sip-t-info-midcall},
note = {Source note ss7-carrier-interworking-sip-t-info-midcall, checked 2026-09-24}
}