Source note · Early media and ringback behavior
Under the RFC 3960 policy, if a 180 (Ringing) has been received but no incoming media packets are arriving, the UA generates local ringing.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- ringback generation
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3960
- Checked
- 2026-09-24
Sources
- RFC 3960: Early Media and Ringing Tone Generation in the Session Initiation Protocol (SIP) — IETF / RFC Editor · tier 1 standards and regulators · Section 3.2 (Ringing Tone Generation), policy item 2
Cite this note
APA
WarmTransfer. (2026, September 24). Early media and ringback behavior: source note early-media-ringback-policy-180-no-media. WarmTransfer. https://warmtransfer.net/knowledge/claims/early-media-ringback-policy-180-no-media
BibTeX
@misc{warmtransfer-claim-early-media-ringback-policy-180-no-media,
title = {Early media and ringback behavior: source note early-media-ringback-policy-180-no-media},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/early-media-ringback-policy-180-no-media},
note = {Source note early-media-ringback-policy-180-no-media, checked 2026-09-24}
}