Green Handsfree EVC outstation, Green, Surface mounting

Approvals/certifications:  Facilitates compliance with BS5839-9 when correctly installed.
Supply/operating voltage:  11V DC derived from a compatible SigTEL Master Controller (drops to 6 V DC when in use).
Quiescent current:  3mA
Activation current:  25mA (current draw when intercom is in use).
Open collector outputs:  O/P +Ve & O/P –Ve (closes when outstation is active, typically used to trigger a third party CCTV camera, opto-isolated, normally open, max. 24 V DC, 3 mA).
Indicators:  Red call in progress LED
Controls:  External 'Push to Call or Answer' button (Off Hook); Internal Loudspeaker volume control; Engineer’s “On Hook” and “Off Hook” pins.
Expansion connections:  AFILS +Ve & AFILS –Ve (typically connected to the line-level input of an optional induction loop amplifier): Off-Hook and -Ve (can be optionally connected to an NC951 accessible toilet alarm kit (see instructions for details).
Product dimensions (mm):  160 W x 240 H x 53 D mm.
Construction & finish:  Green steel.
IP Rating:  IP20.
Weight:  1.3 kg.
Operating conditions/temperature:  -5ºC to +40ºC. Max relative humidity: 95%.
Notes:  Microphone frequency response 250 Hz to 5 kHz ±3 dB; Loudspeaker frequency response 250 Hz to 4 kHz ±3 dB; Audio output level: 0 dB (775 mV) balanced line.