Source note · SDP offer answer and codec negotiation

Hold is applied per stream and per direction: a sendrecv stream is held by marking it sendonly and a recvonly stream by marking it inactive, so a call with several streams can be half held.

Checked 2026-09-15

This means that a stream is placed "on hold" separately in each direction. Each stream is placed "on hold" independently.

Vendor: IETF
Product: SIP
Subsystem: SDP offer/answer
Deployment: not restricted
Region: not restricted
Release range: RFC 3264
Checked: 2026-09-15

Sources

RFC 3264 — An Offer/Answer Model with the Session Description Protocol (SDP) — IETF / RFC Editor · tier 1 standards and regulators · RFC 3264 section 8.4 Putting a Unicast Media Stream on Hold

Cite this note

APA

WarmTransfer. (2026, September 15). SDP offer answer and codec negotiation: source note sdp-oa-hold-is-per-stream-and-per-direction. WarmTransfer. https://warmtransfer.net/knowledge/claims/sdp-oa-hold-is-per-stream-and-per-direction

BibTeX

@misc{warmtransfer-claim-sdp-oa-hold-is-per-stream-and-per-direction,
  title  = {SDP offer answer and codec negotiation: source note sdp-oa-hold-is-per-stream-and-per-direction},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/sdp-oa-hold-is-per-stream-and-per-direction},
  note   = {Source note sdp-oa-hold-is-per-stream-and-per-direction, checked 2026-09-15}
}

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