AT&T Definity ISDN 7507 - Manual (Page 47)

Voice Message Retrieval
To retrieve your voice 1 Dial the Voice Message Retrieval code (while
messages when your on-hook or off-hook) [dial tone]
Message light is on
2 Press [ # ] [voice prompting]
Note: Do not press [ # ] if calling from someone
else's extension; instead, dial your own extension
number and (if prompted) your security code.
3 Move through the messages with these dial pad
buttons: (Press [ # ] to retrieve first message)
[ # ] NEXT (read next message)
[ * ] [ 3 ] DELETE (erase from storage)
[ * ] [ 4 ] HELP (request assistance)
[ 2 ] [ 3 ] REPEAT (read message again)
[ 8 ] CALL (call back named extension)
Note: When you call back an extension with [ 8 ],
be sure to also delete the message with [ 3 ] either
before you place the call or after you complete it;
otherwise, the message will remain in storage.