Replacing The Wp Cables - Avaya S8700 Series Manual

Replacing the WP cables

WP cables have straight, not twisted, wires. They may be mostly white with two red, or
multi-colored. You must replace the WP cables, which connect the backplane to the rear
connector panel, with Twisted Pair I/O cables. If the cables have multi-colored, tightly twisted
wires, no replacement is necessary.
To replace the WP cables:
1. Loosen the thumb screws on the fan assembly and pull it straight out as shown in
Assembly Removal
2. Note the orientation of the existing 10 cables (WP-90753, LI). The WP cables may be white
and red or multicolored.
3. Remove the nontwisted pair WP cables from the backplane and the connector panel slots.
4. In their place install the 10 tight-twisted pair I/O cables (700181118) onto the backplane,
according to the proper orientation shown in
Cables on page 120. Observe the white outline printed on the backplane for the location of
each connector.
5. When viewed from the "wiring" side of the twin connectors (that is, while plugging them into
the backplane) and with the connectors oriented properly for plug-in, they should look like
Figure 20: Proper Orientation for the Twisted Pair I/O Cables
The circled pin locations are "No-Connects"; that is, they have no wires in them. At the top
there is an orange-black pair on the right and a violet-brown pair on the left.
The 50-position metal shell D connectors should be installed into the connector panel with
the longer side of the D (pins 1–25) toward the right when viewed from the rear of the media
gateway.
6. Replace the fan unit if no other media gateways are to be installed. If you are adding more
media gateways to the rack, leave the fan units off until all the TDM cables are installed.
Converting a processor port network to a port network (IP600)
on page 120. Leave the fan assembly off until all the wires are installed.
Proper Orientation for the Twisted Pair I/O
on page 120.
Issue 4 January 2005
Fan
119