Page 3
The BP320 has the capability to talk on either or both channels without connecting the channels together. extracts the listen signal from its line and sends it to the respective headphone amplifier and volume control.
Page 4
The BP320 User Station has the following controls, which are described in Section 3: 1) CHannel select switch 2) A latching-action MICrophone ON-OW toggle switch. 3) A momentary-action MICrophone ON-OFF pushbutton switch 4) A dual concentric headphone VOLUME control. 5) CALL LIGHT switchJindicator (Call Light Option).
Page 5
(as in the local power option) from 12 to 33 volts. Model BP320 current requirements range from 20 to 50 mA; BP320-L, from 30 to 60 Since, in (I), above, the power and communications signals share conductors, it may...