CounterPath X-Lite 4.6 for Mac User Guide - Manual (Page 42)

CounterPath Corporation
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Account – Transport
Field Description
Signaling Transport Contact your VoIP service provider to identify the types of transport that are supported.
Then choose a supported transport:
• Automatic: X-Lite sets up the transport based on the capabilities of the network and the
X-Lite computer. Choose this option if you do not care which transport is used.
• TCP
• UDP