System defaults are provided in the call rerouting forms (see below for list of forms). These defaults result in internal calls being rerouted to a busy or reorder tone, and incoming trunk calls being rerouted after the COS-controlled "No Answer - Recall Timer" expires, to the device that originally handled the call (usually an attendant).
In the event that the system defaults are insufficient and rerouting is required, the following points should be considered:
The COS "Call Forward - No Answer Timer" determines the length of time a call will ring a station before it is forwarded to the next programmed destination. The timer is reset each time the call is forwarded.
The System Option "Call Rerouting Timer" determines the length of time from initial call setup until the unanswered call is rerouted to the destination programmed in the Call Rerouting Second Alternatives form. The timer remains active through all COS-controlled call forward programming that may be activated at the destination station(s).
For ACD applications, the COS option "ANSWER PLUS - System Reroute Timer" controls second level rerouting. When the timer expires, the call is rerouted from the first alternative to the second alternative.
The COS "No Answer - Recall Timer" determines the length of time that the station programmed as the last alternate answer point will ring before the call is rerouted back to an attendant or station if it is a transferred call.
The reroute always destination of a phantom group must be an MCD or an ACD voice group or another phantom group.
Call rerouting first or second alternative will not reroute if the destination device is busy. The originally called party will continue to ring or be camped onto.
ISDN and DASSII trunks are rerouted as DID trunks regardless of programming.
System rerouting functions do not recognize trunks with the Public Trunk COS option set to "Yes" as CO trunks but use the actual trunk type for application.
For more information: