AT&T MERLIN LEGEND System Reference Manual page 318

Features
All Other Multiline
Telephone Users
Single-Line Telephones
Considerations
Feature Interactions
Callback
Call Waiting
Conference
To pick up a call ringing on any other group member's telephone, the user
presses a programmed Group Pickup button or presses the Feature button and
dials 88. The user is connected to a call ringing at any group member's
telephone. MLX telephone users can also press the Feature button and select
the feature from the display.
To pickup a call ringing at any other group member's telephone, the single-line
user lifts the handset (while listening to internal dial tone) and dials #88.
Note: When the single-line telephone user is on a call and puts the call on hold
to pickup another call by using Individual or Group Pickup, the user cannot put
the picked-up call on hold to return to the first call. If the user presses and
releases the switchhook or presses the Recall button, the picked-up call is
dropped and the user is reconnected to the-original held call. If the user hangs
up, the picked-up call is disconnected and the first call is considered on hold for
transfer and is not returned to the user until after the Transfer Return interval.
A maximum of 30 Pickup groups can be assigned, each with a maximum of
15 members.
A telephone cannot be assigned to more than one Pickup group.
Individual Pickup is used to pick up calls parked at park zone extensions by
system operators.
When Group Pickup is used to answer a call, the user cannot determine
whose call is being answered. A user with an MLX display telephone
receives call information and can determine whose call is answered only
after the call is picked up.
MLC-5 cordless telephones cannot be assigned to Pickup groups.
A Callback request cannot be picked up at another telephone.
Pickup features cannot be used to answer a waiting call at another telephone.
A conference call cannot be picked up at another telephone. A conference
originator can, however, pick up a call and add it to the conference call.
Pickup 2-269