TECPRO BP511 (Single Channel) 27-511

The BP511 single circuit beltpack has 'Mic Select' switches linked in parallel. Pressing either switch will open or close the microphone circuit. The 'Mic Select' switches glow green when activated. A single volume control is provided for monitoring via a pluggable headset. The BP531 is as the BP511 but includes vibration alert.

To catch the attention of operators who have removed their beltpack and headset, a call alert signal is sent by pressing the red 'Call' button. This produces a combination of 20kHz tone and a DC signal to trigger the call lights on all user stations and outstations on a chosen circuit. DC call signalling has been retained for compatibility with previous Tecpro designs.