Source note · Zoom Phone routing and PSTN connectivity
The BYOC SBC settings include an 'Allow REFER support to transfer calls' option (Zoom Phone only) that makes Zoom accept SIP REFER messages from that SBC.
Checked 2026-09-24
This Zoom Phone setting ensures that the Zoom infrastructure accepts SIP REFER messages from this SBC.
- Vendor
- Zoom
- Product
- Zoom Phone
- Subsystem
- byoc-p-sip
- Deployment
- hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- BYOC-P or BYOP-P configuration guide — Zoom Communications · tier 2 current vendor documentation · Add a Session Border Controller (SBC), 'Allow REFER support to transfer calls' option
Cite this note
APA
WarmTransfer. (2026, September 24). Zoom Phone routing and PSTN connectivity: source note zoom-phone-routing-sbc-refer-setting. WarmTransfer. https://warmtransfer.net/knowledge/claims/zoom-phone-routing-sbc-refer-setting
BibTeX
@misc{warmtransfer-claim-zoom-phone-routing-sbc-refer-setting,
title = {Zoom Phone routing and PSTN connectivity: source note zoom-phone-routing-sbc-refer-setting},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/zoom-phone-routing-sbc-refer-setting},
note = {Source note zoom-phone-routing-sbc-refer-setting, checked 2026-09-24}
}