Source note · Calls-per-second limits on SIP trunks and dialers

RFC 7339 defines Via header parameters oc, oc-algo, oc-validity and oc-seq so a server can signal overload to its upstream client, and makes loss-based control mandatory to implement.

Checked 2026-10-02

Vendor: not restricted
Product: not restricted
Subsystem: SIP overload control
Deployment: any
Region: not restricted
Release range: RFC 7339
Checked: 2026-10-02

Sources

RFC 7339: Session Initiation Protocol (SIP) Overload Control — IETF / RFC Editor · tier 1 standards and regulators · Sections 4.1-4.4 and 7

Cite this note

APA

WarmTransfer. (2026, October 2). Calls-per-second limits on SIP trunks and dialers: source note sip-trunk-cps-limits-rfc7339-via-oc-params. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-cps-limits-rfc7339-via-oc-params

BibTeX

@misc{warmtransfer-claim-sip-trunk-cps-limits-rfc7339-via-oc-params,
  title  = {Calls-per-second limits on SIP trunks and dialers: source note sip-trunk-cps-limits-rfc7339-via-oc-params},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/sip-trunk-cps-limits-rfc7339-via-oc-params},
  note   = {Source note sip-trunk-cps-limits-rfc7339-via-oc-params, checked 2026-10-02}
}

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