Source note · Early media and ringback behavior
On Cisco IOS/IOS XE gateways and CUBE, a 180 response without SDP gets local ringback, and the Enhanced 180 feature does not change that.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- SIP provisional response handling
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards guide
- Checked
- 2026-09-24
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards: SIP Enhanced 180 Provisional Response Handling — Cisco Systems · tier 2 current vendor documentation · SIP Enhanced 180 Provisional Response Handling > treatment table / information section
Cite this note
APA
WarmTransfer. (2026, September 24). Early media and ringback behavior: source note early-media-ringback-cube-180-no-sdp. WarmTransfer. https://warmtransfer.net/knowledge/claims/early-media-ringback-cube-180-no-sdp
BibTeX
@misc{warmtransfer-claim-early-media-ringback-cube-180-no-sdp,
title = {Early media and ringback behavior: source note early-media-ringback-cube-180-no-sdp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/early-media-ringback-cube-180-no-sdp},
note = {Source note early-media-ringback-cube-180-no-sdp, checked 2026-09-24}
}