Panasonic KX-TVS50 Installation Manual page 60

INTEGRATING THE VPS WITH PANASONIC KX-T PHONE SYSTEMS
3.
Assignment of the extension line to be connected to the VPS
a)
Go to the "4-2 Extension Line" screen.
b)
Set "Data Line Mode" to "Yes".
c)
Click "Apply" to save the changed data.
Note:
This program prevents the VM port from being interrupted by "Call Waiting",
"Hold Recall", and "Executive Busy Override" features during a call.
Screen output:
60 Installation Manual