366 Matrix ETERNITY NE System Manual
• 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.
• If A disconnects within the Call Back Timer, the system applies Call Back for A’s number.
• The system checks the ‘Call Back to’ parameter in the Call Back profile, to determine whether it has to call
back the same number or an alternative number.
• If alternative number is configured as ‘Call Back to’, the system checks the list of alternative numbers. As
the CLI of A matches with the number in the list, the corresponding alternative number configured for A’s
CLI number.
• The system checks if the number is to be called from the same trunk port or a different group of trunks.
• If the same trunk port is configured as outgoing route, the system will make a call to the number using
mobile port 1.
• If a different group of trunks has been assigned, the system will check if Least Cost Routing is enabled on
these trunks and accordingly make the call back accordingly.
• When A answers the call,
• The system checks the type of Call Back Mode enabled in the Call Back Profile assigned to mobile port 1
(the port on which the call back request was made).
Four scenarios are possible:
1. “Direct Inward Dialing (DID)” is enabled as Call Back Mode on mobile port 1.
• A gets dial tone of ETERNITY.
• A can now use DID feature.
2. 'Pin Authentication - Multiple Calls' or 'CLI Authentication - Multiple Calls' is enabled as Call Back Mode
on mobile port 1.
• A gets dial tone of ETERNITY.
• A can now reach any extension or trunk of ETERNITY from DISA Mode.
3. 'CLI Authentication - Single Call Answer Signaling' is enabled as Call Back Mode on mobile port 1.
• A gets dial tone of another trunk of ETERNITY.
• A can make calls from the trunk.
4. ‘Operator’ is enabled as Call Back Mode on mobile port 1.
• A gets Ring Back Tone.
12. If the system does not find a match for the CLI of the caller in the list, the 'Call Back' feature will not be appli-
cable and the call will be processed according to the normal incoming call logic.
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