Special Features:

Input and output impedance 600 ohms at 1 khz balanced, freq response transmit from 70 hz to 4 khz, receive from 200 hz to 4 khz, audio level transmit is minus 20 dbm average and 0 dbm peak, receive is 0 dbm average and plus 10 dbm max, distortion transmit is 3 pct max, receive is 5 pct max, signal to noise ratio shall be a min of 40 db referenced to 0 dbm for both transmit and receive, switching is accomplished by pushbutton switches c/o 4 rows horizontally and 3 columns vertically

Properties:

An item which determines the mode of operation of one or more remote switches or switch assemblies or of an electrical switching system. If the item also includes an operational control indicator, use control-indicator. See also control, rotary switch.