644 Matrix ETERNITY NE System Manual
Call Back on Trunk Ports
The feature Call Back on Trunk Ports is used to respond to missed calls from particular numbers on the different
trunk ports of SARVAM UCS: CO, Mobile and SIP trunks.
When the Call Back feature is enabled on a trunk port, and there is a missed call on that trunk port, SARVAM UCS
determines if the calling number is eligible for a call back or not. It calls back the same number or an alternative
number configured for that number, either from the port on which it was received or from a different port, depending
on the configuration. SARVAM UCS can be configured to choose the most cost effective line to call back the
missed call numbers.
Employees at remote locations can use this feature to have the SARVAM UCS installed in their office to call them
back, thereby saving on charges (example: roaming charges on mobile calls), where applicable.
How it works
For this feature to work:
• Call Back must be enabled on the desired Trunk Ports.
• The ‘Call Back Timer’ may be configured. When the caller disconnects within the Call Back Timer, the Call
Back will be applied for that number.
• You must define ‘Call Back on’, that is, you must select whether the number which must be called back
should be the same CLI number from which the call was received or an alternative number.
• The number on which call back is to be made must be configured in a List. Also, if you want the call back
to be made to an alternative number, the alternative number must also be configured in a list.
• You must select the trunks through which the call back should be made. If necessary, you may enable
Least Cost Routing on the outgoing trunks you selected for call back.
• Select a ‘Call Back Mode’, i.e. how the call should be routed when the call back is answered by the remote
party; whether it should be routed through Operator, Built-In Auto Attendant, or DISA.
Following is an example of a Call Back on a Mobile Port, when the above parameters are configured.
• Caller A calls Mobile Port 1.
• The system checks if the Call Back is enabled on Mobile Port 1.
• If enabled, the system matches the CLI of A with the Call Back profile assigned to the Mobile Port 1 to
determine if the calling number is eligible for a call back.
• A match is found in the list configured in the Call Back profile.
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• The system waits for the period of the Call Back Timer (configurable, default: 10 seconds).
• A must disconnect before the expiry of the Call Back Timer so that the system can treat it as a Missed Call.
105. If the system does not find a match for the CLI of the caller in the list, the 'Call Back' feature will not be applicable and the call will
be processed according to the normal incoming call logic.
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