233 Matrix VISIONPRO System Manual
Acronyms
DOSA : Direct Outward System Access. A facility to allow a remote access.
DTMF : Dual Tone Multi Frequency. When a code (digit) is dialed, two different specific frequencies
are transmitted.
Flash : A code required to use various system features.
LED : Light Emitting Diode.
LCD : Liquid Crystal Display.
MDF : Main Distribution Frame.
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).
PBX : Private Branch Exchange.
P & T : Post and Telegraph.
PSTN : Public Switched Telephone Network.
PULSE Dialing : A type of signaling in which codes (digits) are dialed in pulses.
Pulse : A waveform generated by making and breaking of loop current.
RTC : Real Time Clock. Date and Time keeping circuit.
SA Mode : System Administrator Mode. General housekeeping functions are allowed from SA Mode.
SA : System Administrator.
SE Mode : System Engineer Mode. Entire programming can be done from this mode.
SE : System Engineer.
SP : Service Provider.
Station : Internal station to which a telephone is connected.
SWG : Standard Wire Gauge.
TONE Dialing : A type of signaling in which codes (digits) are dialed in DTMF mode.
Tones : Different frequencies used for signaling.
Trunk : An external trunk line coming from the service provider.
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