NEC SV-9100 User Manual page 8

Transferring a caller directly to a telephones voicemail
While on the phone with the outside caller
Press Trf in the display then VMsg + extension number or extension button
Hang up the handset.
Leave a Message in another mailbox
Press VMsg + LvMsg Start recording your message, Press # when done.
Dial the extension number you want the message to goto. Then Press Send
Forwarding a message to another mailbox
While listening to a message, Dial 63 + * enter the extension to receive the message, Then
Press #