CounterPath X-Lite 4 for Windows User Guide - Manual (Page 38)

CounterPath Corporation
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SIP Account Properties – 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