Calling Restrictions; Call Waiting - AT&T MERLIN LEGEND System Reference Manual

Features
Considerations
Feature Interactions
Account Code Entry
Automatic Route Selection
Barge-In

Calling Restrictions

Call Waiting

Callback cannot be used for lines or pools assigned to buttons on a
telephone.
No more than 40 dialed digits can be included in a queued call.
A maximum of 64 calls can be queued in the system at one time. A user who
tries to queue the 65th call receives a busy tone.
A multiline telephone user can queue a maximum of 64 calls (the system
limit) and can queue more than one call to the same extension.
A single-line telephone can queue only one call at a time.
If more than one-call is waiting for the same extension or trunk, the call that
has been in queue the longest is connected first.
If the Callback originator does not answer the call from the system within the
number of rings (1-6) programmed, the call is dropped from the queue and
no additional attempts to make the call are made. The number of rings
programmed for Callback refers to the number of rings at the originating
station, not the destination station.
When a call is waiting in queue for an extension, no new calls are sent to the
extension until after the queued call is completed.
An account code must be entered before the user activates Callback. If not, the
user must wait until after the call is connected before entering the account code.
Account codes cannot be entered while the call is queued.
When a call is made via ARS and all possible trunk routes are busy, the call can
be queued for the first route in the pattern. However, if the Facility Restriction
Level (FRL) for the telephone does not allow the call to be made over the route,
the call is not queued.
If Callback is used to request a busy extension or pool and the user is waiting
on the line for the queued call, Barge-In cannot be used.
In the Hybrid/PBX mode, a user with a restricted telephone can use Callback for
a busy pool because restrictions are based on the specific trunk being used to
make the call. When a trunk in the busy pool is available, the system checks for
restrictions assigned to the telephone. If the telephone is restricted, the user
hears a fast busy signal to indicate that the call is not dialed.
When Automatic Callback is used to queue a call at an extension that has Call
Waiting, Callback overrides Call Waiting—the user with Call Waiting does not
hear the Call Waiting tone, and the call is queued until the extension becomes
a v a i l a b l e .
Callback 2-55