136 Matrix PRASAR UCS System Manual
Configuring SIP Extension General Parameters
• Login as System Engineer.
• Under Configuration, click VoIP Configuration.
• Click SIP Extension General Parameters.
• Set the following SIP Extension General Parameters, as required.
• As the Source Port IP Address, select the NAT Traversal mechanism for SIP messages from the
following options:
• Use Ethernet Port IP Address: Select this option, if your system is not located behind a NAT
Router.
• Use IP Address fetched using STUN: Select this option, if your system is located behind a NAT
Router, and you have set 'Use IP Address fetched using STUN' as the NAT Traversal mechanism in
the “Configuring VoIP Parameters”.
• Use Router's Public IP Address: Select this option, if your system is located behind a NAT Router,
and you have set 'Router's Public IP Address' as the NAT Traversal mechanism in the “Configuring
Network Parameters”.
• You may set the Maximum Registration Timer (sec) as required. This is the Maximum Expiry Timer,
which the system will accept in the REGISTER request received. If the value of Maximum Expiry Timer
received in the REGISTER request is greater than the value you have set here, the system will send
the value you have set in the SIP message. The same timer is used for handling SUBSCRIBE
requests. The valid range of this timer is from 10 to 99999 seconds. By default it is set to 3600
seconds.
• You may set the Minimum Registration Timer (sec), as required. This is the Minimum Expiry Timer,
which the User Agent should send in its REGISTER request. If the expiry value in the REGISTER
message is less than this value, the request will be rejected. The valid range of this timer is from 10 to
99999 seconds. By default, it is set to 45 seconds.
The Timers will be applicable only after System Restart.
• Click Submit.
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