Nortel Meridian 1 Manual page 57

7 Check the option settings on all cards that have a switch symbol on the
faceplate. Also check the jumper settings on the NT6D6003 CBT card, if
equipped. For a list of all option switch and jumper settings, refer to
Circuit card installation and testing (553-3001-211).
In option 51C, 61C, and 81C, there is a single jumper in the NT5D21
Core/Network Module. The jumper is located on the front of the
backplane behind card slot 14 (see Figure 9).
• Verify that the jumper is closed (there is a plug over both pins).
In option 61C, a single jumper in each of the NT9D11 Core/Network
Modules determines whether the module is designated as
Core/Network 0 or Core/Network 1. The jumper is located on the front
of the backplane behind card slot 14 (see Figure 7).
• In Core/Network Module 0, verify that the jumper is closed (there is
a plug over both pins).
• In Core/Network Module 1, verify that the jumper is open (there is
not a plug over the pins).
In option 81, four jumpers in the NT6D60 Core Modules determine
whether the module is designated as Core 0 or Core 1. The jumpers are
located on the backplane, along the bottom of the front side (behind the
circuit cards) (see Figure 8).
• In Core 0, verify that all four jumpers are closed (there is a plug over
both pins).
• In Core 1, verify that jumper JB4, between slots 9 and 10, is open
(jumper plug not installed). Verify that the other three backplane
jumpers are closed.
If the Core Module jumpers are set incorrectly, the system will not
load and operate correctly.
Preparing equipment for installation
CAUTION
Page 19 of 500
System installation procedures