AT&T 555-620-126 Telephone User Manual


 
Features
Using Automatic Callback
When you reach a busy extension or outside line (that
is, you hear five short beeps), hang up.
When the extension or line is free, the Callback feature is activated.
When you hear the priority ring (three rings), lift the
1.
2.
handset.
You hear three short beeps, and the call is dialed
Canceling a Callback Request
automatically.
Lift the handset.
Dial
#
55.
You hear a confirmation tone (three breaks in the dial tone).
Hang up.
The callback request is canceled.
1.
2.
3.
Callback
5-7