Ed-1E434, Group 84 Coaxial Cabling - AT&T System 85 Installation And Test

ED -1E434, Group 84 Coaxial Cabling
Connect the ED -1E434, Group 84 intercabinet coaxial cable(s) (Figure 27) from the common
control backplane(s) to the module control backplane(s).
Figure 28 illustrates the
connections for an all unduplicated system. Figure 29 illustrates the typical connections for
an all duplicated system; while Figure 30 shows the connections for a typical system with
duplicated common control and unduplicated module control. Route the cable between the
cabinets through the duct work (use the shielded intercabinet duct for flat cables). The B
and D legs are not used in an all unduplicated system, or a duplicated common control and
unduplicated module control. The B and D legs should be coiled and stored in the cable duct
(if space permits). Use the Customer System Document (CSD) and Tables I, J, and K to
determine the backplane pin locations used at the common control and the leg(s) of the cable
that is to be connected at each module control.
Use Tables I, J, and K to determine this association by looking up the remote module
number (to be paired with a central module) to find the appropriate common control
backplane connector(s) and the leg that is used for the central module control.
The first column in Tables I, J, and K is the remote module number. This is not the number
the module is assigned within the total system, but is the number assigned the remote
module. The first remote module may be the sixth module within the system. For example,
if your remote module being installed is the fourth remote module in the system, then for an
all unduplicated system, a Group 84 cable will run from E8 on the common control
backplane to B04 on the module control backplane using leg C. However, for an all
duplicated system, the Group 84 cable will run from E8 on both common control backplanes
to B03 and B 0 4 on both the module control backplanes using legs C and D.
For a duplicated common control and unduplicated module control system, the Group 84
cable will run from E8 on both common controls. Leg A from CCO will connect to B04,
while leg A of CC1 will connect to B03 of the same module control carrier. Leg B of each
cable is connected in the same manner to the next module. Legs C and D are not used, and
should be stored. Repeat this process for each central module control that is being linked to
a remote module.
A Group 89 cable can be used to extend each leg of the Group 84 cable. The combined length
of Groups 84 and 89 cable must be a maximum of 200 feet. The maximum length of the
unused Group 84 cable must be 8 feet.
An existing Group 84 cable can be used if its unused legs are not dead-dressed or cut off. If
the existing cable must be replaced, the original connections must be replaced.
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