Panasonic KX-TGD320ALB Service Manual page 59

11.6.1.2.1. How to update the BBIC.
• Execute COM communicator.exe
1. Initialize COM port.(Only once at first.)
Select "Setting"  "Serial port"  "Initial settings"  "OK".
2.Select serial port COM number.
Select "Setting"  "Serial port"  "Setting"  "OK".
Fill up the "COM Options"  "OK".
Note:
Once download is successful for a PC, this step is unnecessary next time to the PC.
Setting
Serial Port
OK
Setting
Serial Port
(1)
(3)
OK
KX-TGD320ALB/KX-TGD322ALB/KX-TGD323ALB/KX-TGDA30AZB
Cancel
Initial Setting
(2)
Cancel
59
Setting