AT&T MERLIN LEGEND MLX-10 Non-Display Telephone User Manual page 53

Features
To Program a Selective Callback Button
1. Label button to be programmed as Callback.
2. Press Feature and dial 00.
3. Press button you labeled Callback.
4. Dial 55.
5. Press Feature and dial
To Use Selective Callback for Busy Extensions
1. When you reach a busy extension, press programmed Callback
button, or press Feature and dial 55.
2. Hang up when you hear five short beeps.
Your call is placed in queue until the extension becomes available. The
green light next to the line button flashes.
3. Lift handset or press Speaker when you hear one long ring and
three short rings.
You hear three short beeps, and your call is dialed automatically.
To Use Selective Callback for Busy Outside Lines
1. If you hear a fast busy signal after dialing an outside number,
press programmed Callback, or press Feature and dial 55.
If you hear a second dial tone, finish dialing the number and press #.
2. Hang up when you hear five short beeps.
Your call is placed in queue until the line becomes available.
The green light next to the line button flashes.
3. Lift handset or press Speaker when you hear one long ring and
three short rings.
You hear three short beeps, and your call is dialed automatically.
Note: On phones with ICOM buttons, use Line Request
instead of Selective Callback for busy outside lines.
00.
5 - 7
C a l l b a c k