Source note · Troubleshooting calling in the Webex App
If UDP is blocked, Webex apps fall back to TCP for media, and to TLS if TCP is also blocked; Cisco strongly recommends UDP for voice and video media.
Checked 2026-10-01
- Vendor
- Cisco
- Product
- Webex App
- Subsystem
- media transport
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-01
- Checked
- 2026-10-01
Sources
- Network Requirements for Webex Services — Cisco Systems, Inc. (help.webex.com) · tier 2 current vendor documentation · IP subnets for Webex media services; Transport protocols and encryption ciphers for cloud registered Webex apps and devices
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting calling in the Webex App: source note webex-app-calling-troubleshooting-media-fallback-tcp-tls. WarmTransfer. https://warmtransfer.net/knowledge/claims/webex-app-calling-troubleshooting-media-fallback-tcp-tls
BibTeX
@misc{warmtransfer-claim-webex-app-calling-troubleshooting-media-fallback-tcp-tls,
title = {Troubleshooting calling in the Webex App: source note webex-app-calling-troubleshooting-media-fallback-tcp-tls},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/webex-app-calling-troubleshooting-media-fallback-tcp-tls},
note = {Source note webex-app-calling-troubleshooting-media-fallback-tcp-tls, checked 2026-10-01}
}