AT&T Merlin Legend MLX-20L Operation Manual page 41

Lines 5 through 7 show abbreviated information about calls
on each call button. (The numbers correspond to the numbers
on the call buttons.)
Note: If you inspect a call button with a conference on it, lines
5–7 will display information about the conference participants.
To gather information about a conference call, press
Inspct, then press the call button where you set up the
conference.
Inspect Conference Screen
Line 1 shows the number of people on the conference call.
Line 2 is blank.
Line 3 shows the number of calls waiting in your queue
(first number) and the number of calls waiting in the system
queue (second number).
1-27