backup outbound proxy server.
9.2.4. Configure Data Transmission Type
SIP message can be transmitted in three data transmission protocols:
UDP (User Datagram Protocol),TCP(Transmission Control
Protocol),TLS (Transport Layer Security) and DNS-SRV. In the
meantime, you can also identify the server from which the data come
from.
To do the configuration , you can do as follows:
1. Click Account > Basic > Transport Type
2. Select the Transport type according to your need.
3. Click Submit tab for the validation or Cancel tab for the
cancellation.