The RFC 5359 music-on-hold example has the holding party send a REFER to a music server which then sends an INVITE with Replaces to the held party and streams music to it.

Checked 2026-09-24

This is performed by Bob sending a REFER to a Music Server that sends an INVITE with Replaces to Alice.
Vendor
IETF
Product
SIP service examples
Subsystem
music on hold
Deployment
any
Region
not restricted
Release range
RFC 5359 as published
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Hold resume and conference signaling: source note hold-resume-conference-5359-moh-refer-replaces. WarmTransfer. https://warmtransfer.net/knowledge/claims/hold-resume-conference-5359-moh-refer-replaces

BibTeX

@misc{warmtransfer-claim-hold-resume-conference-5359-moh-refer-replaces,
  title  = {Hold resume and conference signaling: source note hold-resume-conference-5359-moh-refer-replaces},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/hold-resume-conference-5359-moh-refer-replaces},
  note   = {Source note hold-resume-conference-5359-moh-refer-replaces, checked 2026-09-24}
}

Read in context