Source note · One-way and no-way audio diagnosis
In a hairpin call through CUBE, neither the caller nor the called party sends RTP until it receives RTP from something in the call path. Cisco calls this a deadlock, and the result is no-way audio.
Checked 2026-09-24
both, the call initiator and the call receiver don't send any streams unless they receive a stream from someone in the path of the call, this is a deadlock situation
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- hairpin media
- Deployment
- on-premises
- Region
- not restricted
- Release range
- technote 214622, updated 2023-07-18
- Checked
- 2026-09-24
Sources
- Troubleshoot No-way Audio Issue with Hairpin Calls on CUBE — Cisco Systems, Inc. (www.cisco.com) · tier 2 current vendor documentation · Technote 214622, Problem section
Cite this note
APA
WarmTransfer. (2026, September 24). One-way and no-way audio diagnosis: source note one-way-audio-hairpin-deadlock. WarmTransfer. https://warmtransfer.net/knowledge/claims/one-way-audio-hairpin-deadlock
BibTeX
@misc{warmtransfer-claim-one-way-audio-hairpin-deadlock,
title = {One-way and no-way audio diagnosis: source note one-way-audio-hairpin-deadlock},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/one-way-audio-hairpin-deadlock},
note = {Source note one-way-audio-hairpin-deadlock, checked 2026-09-24}
}