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11-4
Chapter 11 - Triad 3 System Configuration
Common Control Equipment
Basic Cabinet (BKSU)
The system consists of a maximum of four cabinets that can be stacked together. The first
cabinet, or Basic KSU houses the common equipment boards and peripheral equipment
boards. The card slots (0-8) in this cabinet are totally universal.
Expansion Cabinet (EKSU1)
The EKSU1 mounts directly above the BKSU. The card slots in Expansion Cabinet 1 houses
only peripheral boards. Any arrangement of CO lines, stations, etc., is permitted. The system
size is limited to the ports available and can be configured in to customer requirements.
Expansion Cabinet (EKSU2)
The EKSU2 mounts to the right of the BKSU and EKSU1. The card slots in Expansion Cabinets 2
and 3, house only peripheral boards. Any arrangement of CO lines, stations, etc., is permitted.
The system size is limited to the ports available and can be configured to customer
requirements.
Battery Charging Unit (BCU)
The optional BCU provides the charging circuitry for a 24 VDC battery package. The charging
is 28 VDC at 0.5 Amp. The BCU installs in the DCCU.
DC/DC Converter Unit (DCCU)
The DCCU converts the unregulated 24 volts DC power into regulated logic voltages (+5v,
-5v, +12v) which the system needs to operate. The DCCU is required for system operation and
also provides -48vdc to support specialty cards (i.e., DIDB). Up to 1 amp of -48v dc per cabinet
can be supplied by the DCCU. One DCCU per BKSU/EKSU1 is required.
PS-10/PS15 Power Supply (PS)
The power supply is housed in the Basic KSU (BKSU) and Expansion KSU (EKSU1) cabinets.
Each BKSU and EKSU1 cabinets can house up to two power supplies. The power supplies
converts 117V ac to 24V dc and connects to the DC/DC converter unit (DCCU) located in each
Basic cabinet. The power supply has a output rating of 10A or 15A.
Ring Generator Unit (RGU)
The RGU is enclosed in its own housing and is externally wall mounted. It provides 90VAC
ring voltage for ringing SLTs and lighting of MSG Waiting lamps. This unit connects to the
BKSU and EKSU1. One (1) is required for single line telephone (SLT) operation per BKSU and
EKSU1.
Common Control Equipment
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