NEC SV-9100 User Manual page 4

Redial Button
Press the Redial button to redial one of the last (10) numbers dialed from your telephone.
Group Listen
Press the speaker button twice (Do not hang up) The speaker button will flash.
You can talk to the caller through the handset.
Your coworkers will hear the caller's voice over the speakerphone.
Conference Calling
Make the first call, Then press Conf in your display.
Dial (9) to get an outside line and make your 2nd call.
Press Add and then Begin.
Park Buttons
If your telephone has Park buttons assigned, You will use them instead of the Hold button.
To place a call on Park, Press one of the Park buttons, The Park button will flash.
To retrieve a call from Park, Press the flashing Park button.
Repeat Redial
If you dialed a telephone number and it was busy.
Press Feature + Redial.
The telephone will periodically go off-hook and dial the last telephone number.
To cancel the repeat redial
Press Feature + Redial.