Be sure VTO is added in the monitor settings well and is enabled there.
2.6 Group Call
If you want to call via one button door station more than one monitor at the same time,
you can use “group call” function. For group call you can´t connect every monitor models. This
function you can use only for combination of
VTH-15xx
2.6.1. Settings for VTH-15xx conection
The first (MASTER) monitor must be set to
101
adress and next monitors (SLAVES) must
be set to Extension mode with
101-1
/
101-2
/
101-3
/
101-4
/
101-5
adress. Eventually as on the
table below:
