Source note · SIP OPTIONS pings and trunk keepalives
The 180-second clause in Microsoft's OPTIONS frequency rule contradicts itself as written ('more or less frequent'). Read together with the three-minute health window on the monitoring page, the likely intent is that an SBC sends OPTIONS no more often than every 60 seconds and no less often than every 180 seconds.
inferred · Checked 2026-09-24
- Vendor
- Microsoft
- Product
- Teams Phone Direct Routing
- Subsystem
- SBC pairing
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Status
- inferred
- Checked
- 2026-09-24
Sources
- Connect your Session Border Controller (SBC) to Direct Routing — Microsoft · tier 2 current vendor documentation · section 'Considerations', SIP OPTIONS bullet; read against ms-learn-dr-monitor section 'Monitoring availability of Session Border Controllers...'
Cite this note
APA
WarmTransfer. (2026, September 24). SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-frequency-reading. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-frequency-reading
BibTeX
@misc{warmtransfer-claim-sip-options-keepalive-dr-frequency-reading,
title = {SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-dr-frequency-reading},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-options-keepalive-dr-frequency-reading},
note = {Source note sip-options-keepalive-dr-frequency-reading, checked 2026-09-24}
}