Panasonic KX-TVM50 Installation Manual page 116

4.4 KX-TE Series PBX Programming for APT Integration
When "Jack 7 & 8" is selected, extension jack numbers 07 and 08 will be in extension group
7 automatically. Likewise, when "Jack 15 & 16" is selected, extension jack numbers 15 and
16 will be in extension group 8 automatically. Also the Extension Hunting type is set as
"Circular" automatically in each of these 2 extension groups. You can confirm these
automatic settings in the "2.Extension-6.Extension Group" screen.
116 Installation Manual