Source note · SIP OPTIONS pings and trunk keepalives
An implementation that uses RFC 3261 default timers for an OPTIONS transaction with no response would give up after about 32 seconds (64 x 500 ms). Vendors can and do shorten this with their own retry and timeout settings.
inferred · Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- transaction layer
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261 (June 2002)
- Status
- inferred
- Checked
- 2026-09-24
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · derived from Section 17.1.2.2 and Table 4
Cite this note
APA
WarmTransfer. (2026, September 24). SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-options-timeout-32s. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-options-keepalive-options-timeout-32s
BibTeX
@misc{warmtransfer-claim-sip-options-keepalive-options-timeout-32s,
title = {SIP OPTIONS pings and trunk keepalives: source note sip-options-keepalive-options-timeout-32s},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-options-keepalive-options-timeout-32s},
note = {Source note sip-options-keepalive-options-timeout-32s, checked 2026-09-24}
}