Coral FlexiCom 6000 Installation Manual
Cabinet Descriptions
6-21
Cabinet Descrip
tion
s
6
The Peripheral Bus of the Coral FlexiCom 6000 system is extended from the
MPG-ATS backplane card in back of the Common Control Shelf to the PBD-ATS card
on the backplane of the
even
numbered Peripheral Shelves (see
) via one or two redundant multi-conductor FC19 cables. The redundant
cables serve the Hot Standby dual control system. Each cable provides the connection
for one of the control card sets.
The MPG-ATS card and PBD-ATS cards are daughter boards installed on each
respective backplane to facilitate the interconnections. The MPG-ATS is located
behind the 32GC card slots of the two control system sets positioned in the middle of
the Common Control Shelf backplane. The PBD-ATS is installed on each even
peripheral shelf behind the PB-ATS cards. The PBD24S is installed behind slot 1 of
each odd peripheral shelf. The odd shelf is connected to the even shelf via a FC16
(100cm) or FC18 (50cm discontinued) cable connection, this indirectly connects the
odd shelf to Control Shelf.
Two redundant FC19 cables carry the system’s high-level data link control (HDLC)
highways, the pulse code modulation (PCM) streams and all the Clock and Sync
signals from the control card to the PB-ATS cards for the Peripheral Shelf Unit.
The Clock signal is used to identify the bit period of the HDLC and PCM highways.
The Sync signal is used to identify the beginning of time slot 0 on the PCM highways.
Time Slot Distribution among the Peripheral Units
The 32GC card supports eight HDLC highways and thirty-two PCM streams where
each stream supports 128 times slots (64 for highway A and 64 for highway B), see
. The number of streams allows the 32GC to support up to 8 Peripheral
Shelf Units which can house a maximum of 16 peripheral shelves/cages. The time
slots are supported via the PBD-ATS which feeds off the PB-ATS card (2 PB-ATS
cards for the Hot Standby system are redundant — only one card broadcasts the
512 time slots).
Connectors for cabling to support both control card sets appear on the MPG-ATS, at
connectors P1 to P16. MPG-ATS connectors
P1
to
P8
carry the signals from the first
32GC. MPG-ATS connectors
P9
to
P16
support the redundant cabling for the second
32GC card, when installed. Each Peripheral Shelf Unit (an even, or even and odd
shelf) is allotted 512 time slots divided into four three groups of 128 time slots.
illustrates the PCM highway distribution for a Peripheral Shelf Unit
...................................................................................................
5
Peripheral Highway Cabling
