Source note · SIP OPTIONS pings and trunk keepalives
Direct Routing treats an SBC as healthy if it sent OPTIONS at some point in the last three minutes, which is three times the regular one-minute interval.
Checked 2026-09-24
If options were sent during the last three minutes, the SBC is considered healthy.
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC health monitoring
- 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', worked example (11:00-11:15 AM)
Cite this note
APA
WarmTransfer. (2026, September 24). SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-three-minute-window. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-three-minute-window
BibTeX
@misc{warmtransfer-claim-sip-options-keepalive-dr-three-minute-window,
title = {SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-three-minute-window},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-three-minute-window},
note = {Source note sip-options-keepalive-dr-three-minute-window, checked 2026-09-24}
}