Source note · Troubleshooting a Webex Calling Local Gateway
On CUBE hairpin calls, no audio can result from a deadlock where both ends wait for incoming RTP before sending. Documented fixes include software MTP, media flow-around, media anti-trombone and STUN packets.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- media
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as of 2023-07-18
- Checked
- 2026-09-25
Sources
- Troubleshoot No-way Audio Issue with Hairpin Calls on CUBE — Cisco Systems, Inc. (www.cisco.com) · tier 2 current vendor documentation · Problem and Solution sections
Cite this note
APA
WarmTransfer. (2026, September 25). Troubleshooting a Webex Calling Local Gateway: source note webex-local-gateway-troubleshooting-hairpin-deadlock. WarmTransfer. https://warmtransfer.net/knowledge/claims/webex-local-gateway-troubleshooting-hairpin-deadlock
BibTeX
@misc{warmtransfer-claim-webex-local-gateway-troubleshooting-hairpin-deadlock,
title = {Troubleshooting a Webex Calling Local Gateway: source note webex-local-gateway-troubleshooting-hairpin-deadlock},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/webex-local-gateway-troubleshooting-hairpin-deadlock},
note = {Source note webex-local-gateway-troubleshooting-hairpin-deadlock, checked 2026-09-25}
}