Source note · SIP early offer and delayed offer
46 Labs states that without a reliable 18x response carrying SDP, a delayed-offer INVITE cannot establish an early media session (for example network ringback).
Checked 2026-09-25
Without a reliable SIP 18x response with SDP, a delayed offer SIP Invite will not be able to establish an early media session
- Vendor
- 46 Labs
- Product
- 46 Labs SIP carrier services
- Subsystem
- early-media
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Early Offer versus Delayed Offer SIP Invites — 46 Labs · tier 2 current vendor documentation · Article body, early media paragraph
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-46labs-no-early-media. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-46labs-no-early-media
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-46labs-no-early-media,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-46labs-no-early-media},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-46labs-no-early-media},
note = {Source note sip-early-delayed-offer-46labs-no-early-media, checked 2026-09-25}
}