RISCO Group ProSYS EV - Manual (Page 6)

6 Voice Module Installation Guide
Mounting the Voice Module
The Voice module should be mounted inside the metal box with
the ProSYS Main Panel in order to make a connection between
the 2 units.
Mounting the MBU
Mount at least one Message Box Unit (MBU) with buttons close
to a ProSYS system's keypad for easy messages recording.
A Message Box Unit (MBU) without buttons has to be mounted in
a place where Listen - In operation is to be performed.
NOTE:
Allocate the Voice Module to the ProSYS security system according to
the described in the ProSYS Installation and Programming Manual.