Source note · SIP early offer and delayed offer
A Unified CM call that reaches Teams Direct Routing as a Delayed Offer will not be supported, so the SBC in front of Teams must either receive an Early Offer from Unified CM or convert Delayed Offer to Early Offer itself (for example with CUBE early-offer forced).
inferred · Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- interop
- Deployment
- hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Status
- inferred
- Checked
- 2026-09-25
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · Inbound call: SIP dialog description > Non-media bypass flow (Delayed Offer note); combined with cisco-cube-xe-do-to-eo feature overview
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-inf-cucm-teams-needs-eo. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-inf-cucm-teams-needs-eo
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-inf-cucm-teams-needs-eo,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-inf-cucm-teams-needs-eo},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-inf-cucm-teams-needs-eo},
note = {Source note sip-early-delayed-offer-inf-cucm-teams-needs-eo, checked 2026-09-25}
}