Lucent Technologies MERLIN Plus Release 2 System Manual page 146

HOW TO USE
If the number you are calling is busy and you want to use the BB feature, follow
this procedure:
Before you hang up, touch the Busy Buster button.
1
The green light next to the Busy Buster button flashes.
Hang up.
2
Busy
Buster
When the dialed number rings, your voice teminal rings. To begin the call:
Touch Speakerphone or lift the handset.
1
Speaker-
phone
If you no longer want to have the system repeatedly redial the last number you
dialed, you can deactivate the feature.
Without lifting the handset, touch Busy Buster.
1
The green light next to the button goes off.
Busy
Buster
MERLIN Plus System Features 5-27