Bosch Plena Voice Alarm Router

The LBB 1992/00 Voice Alarm Router is an expansion unit that can add six zones and 12 input contacts to the Plena Voice Alarm System.. It can use the built-in amplifier on the LBB 1990/00 Plena Voice Alarm System Controller, and provides inputs and outputs for one or two amplifiers in a multi-amplifier one or two-channel system.It provides dual channel operation for calls and BGM simultaneously to a maximum of six different zones, using two amplifiers.