AT&T 7406BIS - Manual (Page 34)

Call Pickup
To answer a call to a 1 Press [
Call Pickup
] (while off-hook)
member of your pickup or dial Call Pickup code (while off-hook)
group when your voice
You are connected to ringing call
terminal is idle
●
To answer a call to 1 Press [
Hold
]
your pickup group
while on another call
l Present call put on hold
2 Press an idle call appearance [dial tone]
3 Press [
Call Pickup
]
or dial Call Pickup code
● Called voice terminal stops ringing
● You are connected to ringing call
Note: To return to held call after completing present
call, press fluttering [ xxxxx ].