AT&T MERLIN LEGEND Release 4.0 Feature Reference page 287

Feature Reference
An outside caller on hold hears Music On Hold, if programmed, or silence. If a
call on hold is not picked up within a set length of time, the person who put the
call on hold hears a reminder: a beep for a telephone user, an abbreviated ring
for a system operator. This hold timer is fixed at 60 seconds for telephone users.
It is programmable for DLC and QCC operators, as described below.
At an MLX display telephone, the message
display when the user first puts a call on hold. This message reappears briefly
each time the hold timer expires.
Five systemwide Hold options can be set through system programming:
Hold Disconnect Interval. Determines how long the system waits before
releasing the trunk when an outside caller on hold on a loop-start trunk
hangs up. The hold disconnect interval should be programmed to match
the local telephone company's disconnect timing: Long if disconnect is
unreliable, and Short if disconnect is reliable. The hold disconnect
interval applies to all telephone users and system operators. This interval
can be set to the following values:
Long (the factory-set value): 450 ms
Short: 50 ms
DLC Operator Automatic Hold. Determines what happens when a DLC
operator is on a call and presses another line button, an Auto Dial button,
or a Direct Station Selector (DSS) button. The DLC Operator Automatic
Hold setting applies only to DLC operators. This option can be set to the
following values:
Enabled. The active call is automatically put on hold. This prevents
accidental disconnection of callers.
Disabled (factory-set time). The active call is disconnected. This
allows the operator to disconnect one call and answer or dial another
by pressing a single button.
Operator Hold Timer. Determines how long a call stays on hold before
the system reminds the DLC or QCC operator that it has not been picked
up. The operator hold timer applies only to DLC and QCC operators. The
operator hears a reminder (abbreviated ring) when the timer expires. This
timer can be set to a value between 10 and 255 seconds (the factory-set
value is 60 seconds).
If a call is ringing at the console when the timer expires, the reminder is
delayed for 10 seconds so that the operator has a chance to hear it. (If
after 10 seconds the call is still ringing or a new call is ringing, the
reminder is delayed for another 10 seconds, and so on.)
appears briefly on the
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Hold