3-7 SIP Advanced
Listen Port UDP: It is not necessary to change the protocol of the communication port used by the gateway, unless it conflicts with ports used by another device in your network.
RTP Starting Port UDP: The initial value of the port number for transmitting voice data among gateway(s). Each line requires 2 ports. For the
For example, if the starting port is 9000, then Line 1 is using ports 9000 and 9001, and Line 2 is using ports 9002 and 9003.
Session Timer
Session Expiration: This variable is used to avoid billing for abnormally dropped calls due to Internet problems. The default is disabled.
Session Refresh Request: Used to resend UPDATE or
Session Refresher: Selects which user agent is the session refresher. UAS (User Agent Server) is an originator, and UAC (User Agent Client) is a replier.
SIP Message Timeout Adjustment
SIP Message Resend Timer Base: SIP packet will resend if response did not arrive in the base time set in this column. It will send again at "base time" * 2, and send again at "base time" *2 *2. The maximum resend time is four seconds. Resend will stop and restart when the total resend time has reached 20 seconds.
Max. Response Time for Invite: If the destination does not reply in the set time, the call is failed.
21 |