Source note · SIP early offer and delayed offer
Direct Routing may send SIP messages larger than 1,500 bytes, mainly because of SDP, and Microsoft recommends the SBC strip SDP values such as ICE candidates or unused codecs before forwarding to UDP trunks.
Checked 2026-09-25
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- sdp
- 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 · Size of SDP considerations
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-teams-dr-sdp-size-udp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-teams-dr-sdp-size-udp
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-teams-dr-sdp-size-udp,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-teams-dr-sdp-size-udp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-teams-dr-sdp-size-udp},
note = {Source note sip-early-delayed-offer-teams-dr-sdp-size-udp, checked 2026-09-25}
}