Programming instructions

283
Hardware Reference
OPS Line Card
About Peripheral Interface Cabling
Peripheral equipment is connected to the interface circuits of the system
via a cross-connect field. Peripheral interface cards are connected to the
cross-connect field by 25-pair cables. Cables terminate at the node on
50-pin jacks, J1 through J8, with the number of cables being dependent on
the quantity and type of interface cards installed in the node.
Jacks J1 through J8 are hardwired to backplane connectors in slots 1
through 12 to form four slot groups, each comprising three adjacent cards
and each associated with a pair of jacks. Two adjacent slot groups are
shown in backplane connector arrangements. The circuits of interface
cards contained in a slot group are evenly distributed to the relevant pair
of jacks, such that, half the circuits of each card in a group are connected
to the odd-numbered jack and half to the even-numbered jack. Peripheral
wiring (backplane) details the hardwire connections between one slot
group and the associated jacks. The wiring sequence is identical for the
remaining three slot groups.
Cable plugs P1 through P8 are secured to J1 through J8 with hook and
loop type fasteners. The type of equipment used and the layout of the
cross-connect field cables is at the discretion of the installation company.
Installation information for such equipment must be obtained from the
equipment manufacturer.
Figure 64: OPS Line Card