While validating the test cases the calls are placed using TCP if the settings in Call Engine Configuration are set to:
- <add key="AllowSipOverTcp" value="true" />
- <add key="TcpAsDefaultSipTransport" value="true" />
Now to use UDP(User Datagram Protocol) for calls instead of TCP(Transmission Control Protocol) for Voice Packets to travel across the network we need to make some changes in the OPAL configuration.
Note: This solution works only for the environment in which OPAL is configured.
To use UDP instead of TCP for calls below changes needs to be made in the OPAL Config:
The changes need to be made in the Destination field of the OPAL config. Here in the destination field, have to add ";transport=udp" for all the routes.
This will enable the calls to be made using UDP instead of TCP.