PROTON 206/308 V1 System Manual 91
Glossary
Destination Station : The station where the trunk is programmed to land (generally referred as operator).
Executive : The key person in the organization.
Station : The port to which a telephone is connected.
Flash : A code required to use various system features. This code can be dialed either by
tapping the hook switch of the telephone momentarily or by pressing the ‘Flash’ key
of the telephone, if provided.
LED : Light Emitting Diode.
Off-Hook : A condition in which the handset of the telephone instrument is lifted from the cradle.
On-Hook : A condition in which the handset of the telephone instrument rests on the cradle.
(Idle condition of the phone).
PPM-4 : Primary Protection Module (for 4 ports).
Program Mode : Programming Mode. The entire programming of the system can be done from this
mode.
Pulse : A waveform generated by making and breaking of loop current.
Pulse Dialing : A type of signaling in which codes (digits) are dialed in pulses.
PSTN : Public Switch Telephone Network.
RTC : Real Time Clock. Date and time keeping circuit.
Secretary : The sub-ordinate to the executive in the organization.
Secretary Station : The station used by secretary. Station 22 is the secretary station for station 21 and
likewise.
SWG : Standard Wire Gauge.
Tone : Different frequencies used for signaling.
Trunk : An external trunk line coming from PSTN.
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