NEC ASPILA EX Feature Manual page 396

Operation
382 Features
To initiate a Voice Over to a busy extension:
If you hear busy instead, you may be able to dial 7 and hear Voice Over (busy/ring)
tone.
1. Press Voice Over key (PGM 15-07 or SC 851: 48)
OR
Dial 890.
You hear an alert tone and the Voice Over key flashes. You can talk to the called party
after the alert tone ends.
In order to use Service Code 890 for Voice Over, Program 11-16-08 (Voice Mail Ser-
vice Code) must be undefined.
To respond to a Voice Over alert tone to your extension:
You can only respond if you have a Voice Over key.
1. Press and hold flashing Voice Over key.
The Voice Over key lights steadily (green) and you can talk to the interrupting party.
You cannot respond by dialing the Voice Over Service Code.
To return to your original call:
1. Release Voice Over key.
Your Voice Over key flashes when you are talking to your original call.
To switch between your original call and the interrupting party, just keep pressing the
Voice Over key.
Voice Over
Aspila EX Software Manual