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.

When a call alert signal is received on the intercom circuit, the 'Mic select' and 'Call' buttons flash brightly to attract attention.

For increased visibility, Series 2 beltpacks have a mimic LED on their base so the call alert may be seen from most angles.

A 'Call' send/receive confidence tone is also heard in the headset. This may be muted by pressing a combination of buttons on the beltpack.

An optional vibration motor (as used in mobile phones) is available. This triggers when a call alert signal is received. This function can be switched off by pressing a combination of buttons on the beltpack.

Features (Single circuit)

• Male and female XLR 3 pin connectors on base for connection to a single intercom circuit
• Compatible with standard mic cables
• Loop through for daisy-chaining beltpacks
• Lightweight, robust high impact ABS case
• Recessed controls and connectors prevent damage
• New rear mushroom mounting system - mates with swivel belt clip and other mounting options
• Male XLR 4 pin connector for headset
• Powerful headphone amplifier with volume control
• Sidetone preset for adjusting level of own voice in headset
• Limiter on mic amp - prevents distortion due to overload
• Two 'Mic Select' switches in parallel - latching and non-latching operation
• 'Remote Mic Kill' send and receive - 24kHz tone
• 'Call' alert signal 20kHz and DC send and receive. Visual and audible 'Call' indication
• Mimic 'Call' LED indicator on base for increased visibility
• Local 'Call' alert tone - programmable
• Microphone disable mode - programmable
• Bright and dim indicator operating modes - programmable
• Vibration 'Call' alert option
• Beltpack settings revert to default when system power removed
• Black matt finish to minimise visibility in stage applications
• Compatible with original Tecpro designs
• Vibration Alert (BP531 only)

Power requirements:	24 - 30V DC
Maximum current consumption:	40mA in 'Call' mode (all LEDs on)
With optional vibration motor:	50mA
Headset earphone:	8 ohm - 4K earpieces
Microphone:	200 - 600 ohm dynamic
Case material:	High Impact ABS
Dimensions:	120mm L x 103mm W x 54mm H
Weight:	240g.
With optional vibrator motor:	260g