AT&T MERLIN LEGEND System Reference Manual page 319

Features
Coverage
Direct-Line Console
Direct Station Selector
Display
Forward and Follow Me
Group Calling
Night Service
Paging
Park
2-270 Pickup
An Individual or Group Coverage sender or receiver can be a member of a
Pickup group. This allows Pickup to be used to answer a ringing Individual or
Group Coverage call. If a sender who is a member of a Pickup group uses
Coverage On/Off to prevent calls from being sent to Individual or Group
Coverage receivers, his or her calls can be picked up by using the Individual
Pickup feature; however, calls cannot be picked up by using the Group Pickup
feature. When a Coverage call is answered by using Pickup, the call
appearance is removed from all other telephones in the Coverage arrangement.
A DLC can be part of a Pickup group. This allows other group members to
provide backup coverage for the DLC. The DLC system operator can use
Pickup to answer calls on lines/trunks that are not assigned to buttons on the
console.
The DSS buttons associated with a line/trunk number (801-880) cannot be used
to answer calls on specific line/trunks by using the Individual Pickup feature.
These DSS buttons are used strictly to show busy or not busy status of each
line/trunk.
When a user with an MLX display telephone activates Pickup, the "Pickup
Line/Ext:" prompt appears on the display. (The prompt is not displayed if a
button programmed for a specific line or extension is used.) After the user
enters the line or extension number to pick up the call, a confirmation message
is displayed - for example, "Pickup: Outside" or "Pickup: Joe."
Pickup features cannot be used to answer calls being forwarded to an outside
telephone number.
A calling group member can be a member of a Pickup group. Calling group
members can use Pickup to answer a call (either a calling group or individual
group member extension) that is ringing at another group member's telephone.
Line Pickup can be used to pick up a call that is in the calling group queue.
A call ringing at a Night Service group telephone can be answered from another
telephone by using Pickup.
When the line number used for loudspeaker paging is not assigned to a button
on a multiline telephone, a user can access the loudspeaker paging system by
using Individual Pickup and dialing the loudspeaker paging port line number
(801-880), or by programming a Pickup button specifically for the paging port
line number.
A parked call can be picked up by using Individual Pickup.