Alternate SIP Server: enter the backup SIP server IP address or its
URL.
Port: set up SIP server port for data transmission.
Registration Period: set up SIP account registration time pan. SIP
re-registration will start automatically if the account registration
fails during the registration time span. The default registration
period is “1800”, ranging from 30-65535s.
9.2.3. Configure Outbound Proxy Server
An outbound proxy server is used to receive all initiating request
messages and route them to the designated SIP server in order to
establish call session via port-based data transmission.
To configure outbound Proxy server, you can do as follows:
1. Click Account - Basic > Outbound Proxy Server