Source note · SIP OPTIONS pings and trunk keepalives
An SBC that stops sending OPTIONS on the regular interval is demoted, meaning it is not tried first. If the other SBC in the route cannot deliver the call, the demoted SBC is tried again before the call fails.
Checked 2026-09-24
Demotion means that the SBC won't be tried first.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- voice routing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Monitor Direct Routing — Microsoft · tier 2 current vendor documentation · section 'Monitoring availability of Session Border Controllers using Session Initiation Protocol (SIP) options messages', paragraphs on demotion (sbc1/sbc2.contoso.com example)
Cite this note
APA
WarmTransfer. (2026, September 24). SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-demotion-not-removal. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-demotion-not-removal
BibTeX
@misc{warmtransfer-claim-sip-options-keepalive-dr-demotion-not-removal,
title = {SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-demotion-not-removal},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-demotion-not-removal},
note = {Source note sip-options-keepalive-dr-demotion-not-removal, checked 2026-09-24}
}