Source note · Session border controller selection and certification
Zoom Phone requires the SBC to use SIP Early Offer (marked mandatory), RFC 2833 DTMF and RFC 5853 topology hiding.
Checked 2026-10-14
SIP Early Offer (mandatory)
- Vendor
- Zoom
- Product
- Zoom Phone
- Subsystem
- SBC requirements
- Deployment
- byoc-premises
- Region
- not restricted
- Release range
- current as of 2026-10-14
- Checked
- 2026-10-14
Sources
- Overview | Zoom Technical Library — Zoom Communications · tier 2 current vendor documentation · Supported Platforms, Devices, and Hardware > SBC Requirements, bullets 4-6
Cite this note
APA
WarmTransfer. (2026, October 14). Session border controller selection and certification: source note sbc-selection-zoom-sbc-early-offer. WarmTransfer. https://warmtransfer.net/knowledge/claims/sbc-selection-zoom-sbc-early-offer
BibTeX
@misc{warmtransfer-claim-sbc-selection-zoom-sbc-early-offer,
title = {Session border controller selection and certification: source note sbc-selection-zoom-sbc-early-offer},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sbc-selection-zoom-sbc-early-offer},
note = {Source note sbc-selection-zoom-sbc-early-offer, checked 2026-10-14}
}