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Can I use TCP, UDP, or PSTN with WebEx Integrated VoIP audio?

April 26, 2017audio Integrated PSTN TCP UDP voip Webex

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Can I use TCP, UDP, or PSTN with WebEx Integrated VoIP audio?

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A. You can use the UDP or TCP protocols with WebEx VoIP audio. With UDP, you may experience lower latency rates (delays) than with TCP, but with TCP, you can use the SSL security protocol (and the latency rate will probably be greater). When VoIP starts, WebEx tries to connect using UDP and then switches to TCP. You can conduct sessions where some attendees use UDP while others use TCP. UDP is only supported for non-SSL sites. In order to use UDP, the IP ports 9000 and 9001 must be opened for outbound communication using UDP on the corporate firewall. UDP is selected automatically if the ports are open.