Intercom Mute: If enabled, once the call established, the callee
will be muted.
4.2.4.Return Code When Refuse
Go to Phone - Call Feature to configure.
Return Code When Refuse: Allows users to assign specific
code as return code to SIP server when an incoming call is
rejected.
4.2.5.SIP Call Related
Go to Account - Advanced to configure the SIP call related.
Max Local SIP Port: To configure maximum local SIP port for
designated SIP account.
Min Local SIP Port: To configure maximum local SIP port for
designated SIP account.
Caller ID Header: To choose caller ID header format.
Provisional Response ACK: 100% reliability for all provisional
messages, this means it will send ACK every time the phone
receives a provisional SIP message from SIP server.
Figure 4.2.4 Return code when refuse
Figure 4.2.5 SIP call related