Backplane Cable Expansion; Krone Cross Connect System (Uk) - Nortel Meridian 1 Manual

Page 74 of 500 Planning and designating the Modular Distribution Frame (MDF)

Backplane cable expansion

In the backplane configuration in NT8D11AC or NT8D11DC CE/PE and
NT8D37AC or NT8D37DC IPE Modules, only some of the slots on the
backplane are fully cabled to accommodate 24 tip and ring pairs (three cable
connectors). Most of the backplane slots accommodate 16 pairs (two cable
connectors). By adding and reconfiguring cable ends in the backplane slots,
24 pairs can be connected to each backplane slot.
With the 7-cable backplane configuration in the NT8D11AC and
NT8D11DC CE/PE Modules, cable designations D, G, and L on the I/O panel
are reserved for expansion (as shown in Figure 36). Those cable designations
are utilized in the 10-cable expanded configuration in NT8D11BC and
NT8D11EC Modules.
With the 12-cable backplane configuration in the NT8D37AC and
NT8D37DC IPE Modules, cable designations D, H, N, and U on the I/O panel
are reserved for expansion (as shown in Figure 36). Those cable designations
are utilized in the 16-cable expanded configuration in NT8D37BA and
NT8D37EC Modules.
When backplane slots are reconfigured for expanded cabling, the labeling for
NT8D11 CE/PE and NT8D37 IPE Modules must be changed at the MDF to
reflect the change in the backplane slots. Figure 37 gives a sample of the basic
BIX labels for NT8D11 CE/PE and NT8D37 IPE Modules with the standard
backplane cabling configuration and with the expanded backplane cabling
configuration.

Krone cross connect system (UK)

In the Krone cross connect system, one terminating strip holds 10 pairs of
cable. When cross connecting a 25-pair cable on this system, 8 of the
10 terminating points are used on each strip. One 25-pair cable, therefore,
occupies three terminating strips:
8 pairs per strip X 3 strips = 24 pairs
Card allocations
Figures 41 and 42 provide IPE and CE/PE module card allocations for the
Krone cross connect system.
553-3001-210 Standard 14.00 June 1999