Source note · SIP OPTIONS pings and trunk keepalives
For connectionless transports such as UDP, RFC 5626 uses STUN Binding Requests over the flow as the keepalive, sent at random intervals of 24 to 29 seconds.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- SIP Outbound keepalive
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 5626 (October 2009)
- Checked
- 2026-09-24
Sources
- RFC 5626: Managing Client-Initiated Connections in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 4.4.2
Cite this note
APA
WarmTransfer. (2026, September 24). SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-rfc5626-stun-udp. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-options-keepalive-rfc5626-stun-udp
BibTeX
@misc{warmtransfer-claim-sip-options-keepalive-rfc5626-stun-udp,
title = {SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-rfc5626-stun-udp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-options-keepalive-rfc5626-stun-udp},
note = {Source note sip-options-keepalive-rfc5626-stun-udp, checked 2026-09-24}
}