AT&T MERLIN LEGEND Release 4.0 Feature Reference page 192

Feature Reference
Pickup
Saved Number Dial
Signaling
System Numbering
Transfer
192
Direct Station Selector: MLX
DSS buttons associated with trunk numbers (801–880) cannot be used
for answering calls on specific trunks through individual Pickup. These
DSS buttons are used strictly for busy or not busy status of each trunk.
An extension dialed by pressing a DSS button is not stored for Saved
Number Dial.
If a user presses a Signal button programmed with the operator's
extension while making a call to the operator, the LED next to the DSS
button associated with the user changes from flashing to on while the
Signal button is held down.
The beginning extension number for each page is assigned through
system programming. The factory settings are as follows: Page 1 button
begins with Extension 0, Page 2 button begins with Extension 50, and
Page 3 button begins with Extension 100.
The Transfer option of One-Touch Hold applies only to outside calls on
a DLC and not to calls on a QCC. When One-Touch Hold is
programmed and an operator presses a DSS button with an inside
caller on the line (or, in Hybrid/PBX mode, with an outside caller on an
SA button), the call is not put on hold and a signal is sent to the
extension corresponding to the DSS button pressed. When One-Touch
Transfer (with either manual or automatic completion) is programmed
and the operator presses the DSS button while the caller is on the line
and no SA or ICOM button is available to transfer the call, the call does
not go on hold. If the operator hangs up, the caller is disconnected.
Transfer is always initiated and Transfer completion is manual when an
operator presses the DSS button corresponding to a trunk number, pool
dial-out code (Hybrid/PBX only), or ARS access code (Hybrid/PBX
only), even if One-Touch Hold, One-Touch Transfer with Automatic
Completion (DLC only), or Automatic Extended Call Completion (QCC
only) is programmed for the system.
When an operator transfers an Individual or Group Coverage call and
the call returns, the red LED next to the DSS button for the sender does
not flash as it does for a transfer return for calls received on other types
of line buttons.
When an operator transfers a call to a calling group and the call returns,
the red LED associated with the calling group does not flash as it does
for a transfer return from a user's extension.