Introduction To Line Telecommunications

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19. Jargon Buster

This section lists the commonly used features, services and terms encountered with line telecommunications equipment.


A - to - C


D - to - O

P - to - Z


PABX Private Automatic Branch Exchange
PAD Packet Assembler/Disassembler
PBX Private Branch Exchange
PCI Pre Connection Inspection
PDN Private Data Network
PIN Personal Identification Number
POT Plain Ordinary Telephone or SLT
PRI See Primary Rate Interface
Primary rate
30 bearer channel interface to ISDN
Prime Telephone A domestic telephone which can be connected an operate without the need for additional sources of power or continue to operate if its power source fails
PSPDN Packet Switched Private Data Network
PSTN Public Switched Telephone Network
Pulse Dialling Dialling by sending pulses representing the numbers required to the exchange
PXML Private Exchange Master List
Q-SIG An inter-system networking protocol based on Euro ISDN for allowing customer systems at separated office to interact and communicate with each other
RECALL A signal to the telephone system originally to regain a previously held call, but today can also prefix a system command or feature code
REDIAL Re dials the last number dialled from the telephone
REN Ringing Equivalence Number, a measure of the amount of power a telephone will consume when ringing. Most modern equipment has a REN of 1.
Ringing Equivalence
SLT Single Line Telephone
Speed Dial See Abbreviated Dial
SSAC13 Signalling System Alternating Current No. 13
SSAC15 Signalling System Alternating Current No. 15
SSDC10 Signalling System Direct Current No. 10
SSDC5 Signalling System Direct Current No. 5
STD Subscriber Trunk Dialling
System Software The fixed pre-stored instructions used by the CPU to control the equipment
TAM Telephone Answering Machine
TAPI Telephony Applications Programming Interface for CTI
TDM Time Division Multiplexing
TELTAM Telephone with built in answering machine
Time Break Recall A measured break in connection to signal from telephone to the exchange/PBX to hold a call or access a feature
TSAPI Telephone System Applications Programming Interface for CTI
UTP Unshielded Twisted Pair, a wiring type used for telephone and computer networking infrastructure and Category 5 cabling systems
Voice Announce A simplified Automated Attendant which does not offer the message taking facility if the busy destination is busy
Voicemail A system for recording messages for a large number of users automatically and then delivering the messages to the users concerned



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Extracted from

Introduction To Line Telecommunications
Copyright Panasonic Business Systems UK Ltd 2000