6
Telephone Operating Instructions
When an outside call is originated, or a feature that returns dial tone or confirmation tone
is accessed, all the required system resources may not be available. If a resource is not
available, the extension is queued on that resource, and the system returns an alerting
tone repeated at intervals.
When all the necessary resources are available, the the system returns dial tone or
confirmation tone, as appropriate. If the extension is hung up while queued for a resource,
it is taken out of the queue.
A call into the system on a trunk may put the call in the trunk extension queue if the trunk
cannot ring the destination specified in the routing plan. The system gives no indication
that the queue is full; the caller just hears ringback tone.
There are three ways to originate a call with a digital or Type 3100 telephone: manual line
selection, automatic line selection, and preselection. Programming determines how each
telephone functions and which method to use to originate a call. With a single-line
telephone, line selection is always automatic.
Preselection puts a digital or Type 3100 telephone with a SPEAKER button
in the handsfree mode.
Resource Queuing
Line Selection