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Shared Service and Peripheral Interface Card Installation
Some shared service and peripheral interface cards listed in
require changes to option straps on the card that determines the electrical
characteristics or operation of each interface circuit. Refer to specific card
descriptions in the Coral Service and Peripheral Cards Installation
Manual for details.
Peripheral Interface cards may be installed in any universal I/O slot of the Coral
system. However, the following considerations must be taken into account when
designing the peripheral card placements.
1.
Determine the position of shared service and peripheral interface cards that will
be inserted into the card slots. Observe any order previously directed by a system
designer or any established convention of the distributor. The card placement
diagrams,
Figure 2-19
system designer to establish card placement prior to installation. Refer to
to determine shared service and peripheral interface card types. If no other
2-10
convention exists, plan the card placement as follows:
In the main cage, insert a shared service card into slot 9.
In a system with one expansion cage, insert a shared service card into slot 1 of
the expansion cage.
In a system with two expansion cages; insert a PX card into slot 1 of the first
expansion cage, and insert a shared service card into slot 1 of the second
expansion cage.
See
page 6-68, Suggestions for Peripheral Card Distribution
distribution among the slots. The time slots are evenly divided into three
groups of 128 time slots for each of the slot slots. Therefore, slots 1-4 share 128
time slots, slots 5-8 share an additional 128 time slots, and slots 9-12 share the
last 128 time slots. Distribute
of ports: 2DT, 30T/x, T1, PRI-23, PRI-30, UDT, IPG, PUGW with MRC-32/64,
or UGW/UGW-E with MG-30/60) among the PCM groups evenly.
Distribute trunk interface cards (4ALS, 8ALS, 8BID, 8DID, 4GID, 4T, 8T, 4T-C,
8T-C, 4T-CID, 8T-CID, 4TEM, 4TMR, 4TPF, 8TPF, DPC, 4TBR, 8TBR, 30T, 30T/x,
PRI23, PRI30, 2DT, UDT and T1) evenly among all cages in the system, rather
than concentrate trunk interface cards in one cage. This practice ensures that
the failure of a single cage will have minimal impact to trunk service.
Insert the digital trunk interface cards into slots 4 and 5 of the designated main
or expansion cages. Slots 4 and 5 are wired as the secondary and primary
external clock source, respectively. The cards inserted in these slots can be used
to synchronize the Coral system clock with a network clock signal via a digital
trunk circuit. Refer to Coral Synchronization via Digital Trunks section in the Coral
through
2-21, can be used as a worksheet by the
Figure
heavy consumer
Hardware Installation Procedure
Table
2-10may
for time slot / PCM
cards (cards with a large number
Table
2-39
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