DS Series PBX Technical Reference And Installation Guide
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II.1.E. INTER-CABINET CONNECTION UNITS
If the required DS200 capacity necessitates a configuration with four or more racks, such a
structure is accomplished by some intelligent units of the racks located in both cabinets,
which connect the two cabinets to each other.
In order for the inter-cabinet connections to be made, the revision of the CPU200 card must
be R01C.01 or higher, and the revision of the BPL200-MAIN backplane must be R03B.02 or
higher.
Information about the cards used for that purpose is as follows.
II.1.E.1. CCU CARD
The CCU card is a card employed in the second three-rack cabinet, which receives signals
from the CPU200 card located in the first three-rack block, and which distributes these
signals to the second block after amplifying them. Due to its structure, it is attached to the
special slot reserved for the CPU200 in the main rack of the second block and it transports
the signals to the second block over a 64-pin female connector at its back.
The LED on the front face of the CCU card blinks during normal operation.
II.1.E.2. CLOCK MASTER & CLOCK SLAVE CARDS
The Clock Master is installed in the block in which the CPU200 card is located and the Clock
Slave is installed in the block in which the CCU card has been installed. Since there is no
connector at the back of these cards to provide connection to the backplane, they can be
attached in any vacant slot in the system, which is easily reachable in order to facilitate
mounting. (See the DS200 Series Installation Guide, for the convenient slots)
These two cards function as a bridge carrying the PCM channels between the cabinets. The
necessary connections between the cards are made through special cables provided by
Karel.
Five identical eight-wire cables with RJ45 connectors at both ends are used for those
connections. As can be deduced from that fact, number of signals carried between the two
cards is (8 x 5) 40. Indeed, the number of signals that is to be used actively is 20, however, a
ground line is carried with each signal in order to increase the reliability of the carried signals,
so that the signals are affected by the external factors at a minimum.
Summary of Contents for DS200
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