For example, priority messages can be broadcast even when the local volume control is set to low volume to play background music. This ensures that the priority message is broadcast at the specified volume. call channel (calling station selection, all the calls or emergency phone activation), background music channel selection (front panel), closed in addition, also for each area provides a single relay contact volume coverage, to replace local speaker volume control.To switch between each region can be in the following passage: The basic function LBB 1992/00 is equipped with a set of relays for switching the power amplifier's output forward zoning to connect to different speaker marshalling. Users can also use any number of amplifiers, up to no more than the number of routers used.
Multiple routers can also share an amplifier, including an internal amplifier on the controller device. In addition, a single channel operation can be performed when only one amplifier is used. It can use two amplifiers to provide both call and background music dual channel operations to up to six different regions. It can use the built-in amplifier on the controller of the LBB 1990/00 Plena voice alarm system and provide input and output for the single-channel or two-channel amplifiers of multiple amplifiers. The LBB 1992/00 voice alarm router is an extension device that can add 6 zones and 12 input contacts to the Plena voice alarm system.
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