Panasonic KX-TVM50 Installation Manual page 102

4.2 KX-TDA Series PBX Programming for DPT Integration
c)
Program the PBX so that it will direct overflowed calls to the ICD group's mailbox.
1)
2)
3)
4.
Make sure all installation and line connections have been done as described in Section 2
Installation.
5.
Connect the jack assigned in Step 2 to the VPS.
6.
Complete the PBX-VPS connection by following from step 1 of 4.8 Completing the PBX-VPS
Connection.
102 Installation Manual
Go to the "Groups-VM(DPT) Group-System Setting" screen.
Select "Enable" as the parameter for "Intercept to Mailbox".
Click "Apply" to save the changed data.