602 Matrix PRASAR UCS System Manual
corresponding modified CLI/Alternate number string should be programmed at the same Index, 15, in the
Call Back Outgoing Number List.
When the CLI received matches with the number string programmed at Index 15 of the 'Call Back
Incoming Number List', the call back will be made using the (modified/Alternate) number programmed at
Index 15 of the 'Call Back Outgoing Number List'.
By default, ‘Number List’ 16 is assigned to all trunk port types as Call Back Outgoing Number List. You may
program this list for all SIP Trunks, or you may program another Number List and assign it to the particular
trunk.
Refer the topic “Number Lists” for instructions on how to configure the Number List.
If you have selected ‘Alternate Number’ as ‘Call Back on’ option, but do not want to provide alternative
numbers to call back particular callers (that is, CLI received), in such a case, program the CLI of these
callers in the Incoming Number List but keep the corresponding index numbers in the Outgoing Number
Lists blank.
• Call Back from: This parameter determines the trunk port to be used to make call back.The call back can
be made using the same port or an Outgoing Trunk Bundle Group (OTGTBG). Select ‘Same port’ if you
want the call back to be made using the same trunk on which the missed call was received. If you select
OGTBG, the call back will be made using the OGTBG, which you have defined.
• OGTB Group for Call Back: If you selected OGTBG for making the call back in the previous parameter,
you must assign the OGTBG that must be used in this parameter.
By default, OGTBG 01 is selected for Call Back.
If you want the system to select the lowest cost trunk for making the call back, enable Least Cost Routing
on the OGTBG that you define here for Call Back.
To know more, refer “Call Back” in “Configuring SIP Trunks”.
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