GAI-Tronics XAAB002A Audio Accessory Box - Manual (Page 29)

25 11/06
Definitions and Acronyms
Term Definition
Boom Mic A dispatch center microphone suspended from a movable boom so as to position it in
mid-air at face level to the operator. Usually contains a dynamic-type microphone
element.
Carbon
Standard PSTN network standard for telephone instruments that features a 50 ohm handset
receiver element. Off-hook state must exhibit between 8 and 20 mA dc and have a ringer
impedance of 11 kilohms or higher. Hybrid isolation must be 10 dB or better over the
voice band.
CSQ Carrier squelch
Dynamic
Microphone A low impedance, low level microphone element requiring high gain interface amplifiers.
Electret A medium impedance, wide frequency range microphone element requiring a bias voltage
supply.
Ixx GAI-Tronics desk set products such as ILD, ITR, IDR, etc.
Monitor Action taken to disable the CTCSS or CDCSS system in order to determine if the radio
channel is being currently used by other channel licensees.
POTS Plain Old Telephone Set: Refers to carbon standard telephone sets having carbon button
microphone elements (low impedance) and dynamic earpiece elements.
PSTN Public Switched Telephone Network
PTT Push-To-Talk (transmitter key-up)
RF Radio Frequency: High frequency energy emitted by an electronic device.
RX Receive or receiver
TX Transmit or transmitter