Source note · SIP early offer and delayed offer
When a media-bypass Direct Routing call is transferred to a client that cannot use media bypass, Direct Routing starts an ICE restart by changing ice-pwd and ice-ufrag and offering new media candidates in a re-INVITE.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- media-bypass
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Teams Phone System Direct Routing: SIP protocol — Microsoft · tier 2 current vendor documentation · ICE Restart: Media bypass call transferred to an endpoint that doesn't support media bypass
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-teams-dr-ice-restart-reinvite. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-teams-dr-ice-restart-reinvite
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-teams-dr-ice-restart-reinvite,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-teams-dr-ice-restart-reinvite},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-teams-dr-ice-restart-reinvite},
note = {Source note sip-early-delayed-offer-teams-dr-ice-restart-reinvite, checked 2026-09-25}
}