A softphone that connects on a direct internet path but shows Amazon Connect's 'Failed to establish softphone connection' or ice_collection_timeout error when the agent is on a VPN or restrictive network is most likely being denied UDP 3478 or DNS resolution for the TURN endpoint on that path.
inferred · Checked 2026-09-30
- Vendor
- Amazon Web Services
- Product
- Amazon Connect
- Subsystem
- softphone media / TURN
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Status
- inferred
- Checked
- 2026-09-30
Sources
- Contact Control Panel (CCP) Issues — Amazon Web Services · tier 2 current vendor documentation · Error message list 'Failed to establish softphone connection'; section 'CCP WebRTC issues'
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting browser softphone audio in cloud contact centers: source note browser-softphone-audio-troubleshooting-inf-vpn-turn. WarmTransfer. https://warmtransfer.net/knowledge/claims/browser-softphone-audio-troubleshooting-inf-vpn-turn
BibTeX
@misc{warmtransfer-claim-browser-softphone-audio-troubleshooting-inf-vpn-turn,
title = {Troubleshooting browser softphone audio in cloud contact centers: source note browser-softphone-audio-troubleshooting-inf-vpn-turn},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/browser-softphone-audio-troubleshooting-inf-vpn-turn},
note = {Source note browser-softphone-audio-troubleshooting-inf-vpn-turn, checked 2026-09-30}
}