Toshiba DK8, DK 16 manual Installation-Introduction

IMDU: Remote Maintenance Modem Interface Unit (STRATA DK16 only)—A subassembly installed on a PIOU or PIOUS PCB in the op- tional DK16 Expansion Key Service Unit that allows the system to be connected with a remote maintenance/administration terminal.

KCDU: CO Line/Digital Telephone Interface Unit (STRATA DK16 only)—Optional printed circuit board providing two loop start CO line circuits and four digital telephone circuits that can be installed in the Expansion Unit. The digital tele- phone circuits support the same devices as the PDKU except for the DDSS console.

KCOU: CO Line Interface Unit (STRATA DK16 only)—Factory-installed printed circuit board that comes standard with the Base Key Service Unit to provide four loop start CO line circuits. Avail- able as a spare unit for field replacements.

KFCU: (STRATA DK16 only) Option feature car- tridge that plugs into the Base Unit to provide feature upgrades to DK16.

KPSU16: (STRATA DK16 only) Power supply that comes factory-installed in the Base Key Service Unit. This power supply provides power to the entire system, in its standard and expanded configurations. Available as a spare unit for field replacements.

K4RCU: (STRATA DK16 only) Optional unit that can be installed in the Base Key Service Unit to provide a 4-circuit Dual-tone Multi-frequency receiver for CO lines and standard telephones. It also provides busy tone detection for Auto Busy Redial.

KSTU: Standard Telephone Interface Unit (STRATA DK16 only)—Optional printed circuit board that can be installed in the Base Key Service Unit to provide four standard telephone circuits.

LCD: Liquid Crystal Display—Display used for messaging, identification, and status that ap- pears on some digital and electronic telephones.

INSTALLATION-INTRODUCTION

SECTION 100-816-201

MARCH 1993

LED: Light Emitting Diode—Status indicators lo- cated on printed circuit boards, digital telephones, and electronic telephones.

LSI: Large Scale Integration—Related to circuit design technology. STRATA DK8 and STRATA DK16 printed circuit boards use LSI circuit de- sign.

MDF: Main Distribution Frame—The wiring frame usually located in a phone closet.

MDFB: Door Phone Box—A peripheral two-way speaker box option. Each MDFB connects to a DDCB. A DDCB can support as many as three MDFBs.

OCA: Off-hook Call Announce.

PBX: Private Branch Exchange—Industry-stan- dard term which refers to a telephone switch, usually on-premises, which serves an individual company, and is connected to a public tele- phone exchange through the CO.

PCB: Printed Circuit Board.

PCM: Pulse Code Modulation—A widely used form of digital telephone switching.

PCOU1: CO Line Interface Unit (STRATA DK16 only)—A printed circuit board that can be in- stalled in the optional Expansion Key Service Unit to provide the system with four loop start CO lines circuits.

PCOU2: (STRATA DK16 only) The PCOU2 is a direct replacement for the PCOU1. Their fit/ form/function is identical; however, for manu- facturing reasons, the PCOU1 was phased out in favor of the PCOU2.

PDIU-DI/PDIU-DI2:Integrated Data Interface Unit—Replaces the normal digital telephone base to enable the telephone to transmit and receive data between a terminal/personal com- puter connected to the telephone and data devices connected to other PDIU-DIs, or to modems, printers, and computers connected to

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