Source note · Troubleshooting calling in the Webex App
Webex App known issues say that if a call cannot be placed over Wi-Fi, the company firewall may be blocking UDP call media, or the user is on a third-party VPN that does not have phone service.
Checked 2026-10-01
your company's firewall may be blocking UDP packets that contain call media
- Vendor
- Cisco
- Product
- Webex App
- Subsystem
- media connectivity
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-01
- Checked
- 2026-10-01
Sources
- Webex App | Known issues — Cisco Systems (Webex Help Center) · tier 2 current vendor documentation · Calling section, Wi-Fi/VPN item
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting calling in the Webex App: source note webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn. WarmTransfer. https://warmtransfer.net/knowledge/claims/webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn
BibTeX
@misc{warmtransfer-claim-webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn,
title = {Troubleshooting calling in the Webex App: source note webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn},
note = {Source note webex-app-calling-troubleshooting-ki-wifi-udp-or-vpn, checked 2026-10-01}
}