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NOTE: This is an unformatted excerpt from our online fire protection training library.

Auxiliary Fire Alarm Systems

Coded Radio Systems

Type B

There are various configurations for Type B systems, as these systems tend to be smaller. In some configurations, the fire department receives the signal simultaneouslyThis configuration is arranged so that the fire department sees the exact same signal as the public receiving station. A phone call is placed from the receiving station to the fire department to verify alarm receipt.  from any box in the system. Others receive the signal from the box and automatically retransmit the box alarm to the fire department.

A Type B system does not require redundant systems. However, for non-redundant systems to be allowed, there must to be two separate locations receiving the same signalsIn other words, if the public receiving station and a fire station receive signals simultaneously, there doesn't have to be any redundancy in the public receiving station. However, if the public receiving station simply retransmits the signal to the fire station, then there has to be redundancy in the equipment at the receiving station.. Both of these locations have to employ networks using different frequencies if the system is entirely radio frequency-based.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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