AT&T 993 2-Line - Manual (Page 55)

52
Caller ID
Caller ID operation
Call waiting
If you subscribe to the caller ID with call waiting service
and there is a call waiting call, the screen displays call
information for the call:
Press FLASH to access the call waiting call.
To switch back to the original call, press FLASH again.
1.
2.
Message waiting and NEW CALL lights
There is a NEW CALL light for each line. A NEW
CALL light stays on when there is new or missed call
information on that line. If you subscribe to a voicemail
service, a
NEW CALL light flashes when there are
unretrieved messages waiting on that line. The screen
also displays information about the number of new calls
for each line.
12:08 PM 12/26
L1 : 22 New Calls
L2 : 11 New Calls