BCD

Binary Coded Decimal

DTMF

Dual Tone Multi Frequency

EPROM

Erasable Programmable Read Only Memory

Est

Early Steering (Output).

GS

Gain Select.

INH

Inhibit (Input).

ITDL

Integrated Telephone Data Logging

LED

Light Emitting Diode

M/L

Memory Location

MTBF

Mean Time Before Failure

OSC

Osscilator

PABX

Private Automatic Branch Exchange

PCB

Printed Circuit Board

PIO

Peripheral Input Output

PSTN

Public Switched Telephone Network

PWDN

Power Down (Input).

RAM

Random Access Memory

RS232

Recommended Standard 232 (Data communication standard)

RTC

Real Time Clock

SRAM

Static Random Access Memory

St/GT

Steering Input/Guard time (Output) Bi-directional

StD

Delayed Steering (Output).

t _GTA

Time – Guard Tone Absent

t _GTP

Time – Guard Tone Present

TOE

Three State Output Enable (Input).

T/P

Telephone

V _TSt

Voltage – Threshold Steering input

V DD  

Positive power supply (Input). +5V typical.

V SS

Ground (Input). 0V typical.

Y2KC

Year 2000 Compliant