Source note · SIP early offer and delayed offer
Cisco documents SIP reliable provisional responses (PRACK/100rel) as a way to establish early media on delayed-offer calls without using extra media resources such as MTPs.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified CM
- Subsystem
- early-media
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as documented 2013-05-16
- Checked
- 2026-09-25
Sources
- SIP Reliable Provisional Response on CUBE and CUCM Configuration Example — Cisco Systems · tier 2 current vendor documentation · Introduction / background
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-tn116086-rel1xx-no-mtp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-tn116086-rel1xx-no-mtp
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-tn116086-rel1xx-no-mtp,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-tn116086-rel1xx-no-mtp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-tn116086-rel1xx-no-mtp},
note = {Source note sip-early-delayed-offer-tn116086-rel1xx-no-mtp, checked 2026-09-25}
}