368 Matrix PRASAR UCS System Manual
• TCP: Outgoing messages are transported using TCP. If you select this option, you must enable ‘SIP
Over TCP’ on the ‘VoIP Parameters’ page.
• TLS: Outgoing messages are transported using TLS. If you select this option, you must enable ‘SIP
Over TLS’ on the ‘VoIP Parameters’ page.
By default, UDP is selected as the Default Transport for Outgoing Message.
• The Default Transport for Outgoing Message options are checked only if you have enabled SIP over
TCP or SIP over TLS.
• If the SIP over TCP and SIP over TLS are disabled, all outgoing SIP messages will be transported over
UDP only.
• Outgoing (OG) Reference ID: Assign an Outgoing Reference ID for the SIP Trunk, from 00 to 99. By
default, 00 is assigned as Outgoing Reference ID.
• Return Call to Original Caller (RCOC): Enable this check box if you want to apply the 'Return Call to
Original Caller' on this SIP trunk.
If this feature is enabled on the SIP trunk, the system will route calls returned by remote parties back to the
extensions that originally made the call from this Trunk (the original callers' extensions). To know more,
refer the feature description for “RCOC (Return Call to Original Caller)”.
Advanced
• Source Port IP Address: Select the Source Port IP Address for the SIP trunk. You may select from any of
the following options, as applicable to your installation scenario.
• Use WAN Port IP Address: Select this option, if the WAN Port is connected directly to the public
Internet.
• Use LAN Port IP Address: Select this option, if the LAN Port is connected within the LAN network.
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