Panasonic 44-Series - Manual (Page 76)

6. Using Additional Features
74 Issued April 2000 DBS-32-755
Note: The length of the voice mail number and the special codes cannot
exceed 6 digits (8 digits on some systems).
7. Press HOLD.
Using a Voice Mail Transfer Key
1. When a call arrives and the caller wishes to leave a voice message for
another individual, press the voice mail transfer key.
The system automatically puts the incoming call on hold.
2. Dial the extension number of the desired individual.
3. Press RELEASE, ON/OFF, or PROG to complete the transfer to the
voice mailbox.