Bcu Processor Pcbs; Pcb Installation Power Supply Considerations; Maximum Capacities - Toshiba STRATA DK14 Installation And Maintenance Manual

BCU Processor PCBs

System:
DK424i Base Cabinet
Current Version:
B1CU, B2CAU/B2CBU, B3CAU/B3CBU, B5CAU
Older Version(s):
None
The common control unit provides centralized control for the system. It incorporates a 16 or 32 bit,
68000-type microprocessor and contains a custom time switch and conference Large Scale
Integration (LSI) circuitry.
The processor operating software is programmed on four read-only-memory (ROM) chips on the
B1CU, B2CAU, B3CAU, B5CAU PCBs. The B5CBU also has a flash memory PCB (BMMS).
The operating software (ROM or BMMS) is factory-installed.
The BCU common control units also provide busy tone detection as a standard feature for Auto
Busy Redial (ABR) and interfaces with optional BRCS DTMF receivers, feature keys (RKYS1, 2,
or 3) for Auto Attendant (AA), Automatic Call Distribution (ACD), Management Information
System (MIS) for ACD, Toshiba proprietary RS-232 and SMDI voice mail interfaces.

PCB Installation Power Supply Considerations

1. The power supply must be Off whenever removing or installing the processor PCB—B1CU,
B2CAU/B2CBU, B3CAU/B3CBU, and B5CAU PCBs (see
2. It is recommended that the power supply be Off, whenever possible, when removing or
installing the other PCBs.

Maximum Capacities

Configurations for a fully-expanded system can range from 200 lines/ 336 stations.
Additionally, each of the common control units can support a separate set of features. Refer to
Chapter 6 – DK424i Configuration for more information.
Each of the common control units may be equipped with an BRCS (4, 8, or 12) to interpret Dual-
Tone Multi-Frequency (DTMF) signals transmitted from Tie/DID lines, built-in AA and standard
telephone ports. The common control units also provide an interface (along with a volume control)
for a Music-on-hold (MOH)/Background Music (BGM) source.
BCU PCBs are described later in this chapter.
Strata DK I&M 6/00
DK424i Installation
Step 6: BCU Processor PCBs
Figure 7-3).
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