● Outbound Enabled: click “Enable” and “Disable” to turn on or turn off the
outbound proxy server.
● Server IP: enter the SIP address of the primary outbound proxy server.
● Port: enter the Port number for establishing call session via the primary
outbound proxy server
● Backup Server IP: set up Backup Server IP for the backup outbound proxy
server.
● Port: enter the port number for establishing call session via the backup
outbound proxy server.
10.6.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 this configuration on web Account >
Basic > Transport Type interface.
Parameter Set-up:
● UDP: select “UDP” for unreliable but very efficient transport layer protocol.
UDP is the default transport protocol.
● TCP: select “TCP” for Reliable but less-efficient transport layer protocol.
● TLS: select “TLS” for Secured and Reliable transport layer protocol.
● DNS-SRV: select “DNS-SRV” to obtain DNS record for specifying the
location of servers. And SRV not only records the server address but also the
server port. Moreover, SRV can also be used to configure the priority and the
weight of the server address.
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