Paradyne 3000 manual 23. T1 Network Cable Retainer

COMSPHERE 3000 Series Carrier

You need a Phillips screwdriver to install the Auxiliary Backplane. Long-nose pliers, a 1/4″ nut driver, and a 5/16″ nut driver are also required.

WARNING

Turn off the power to the 3000 Series Carrier before you install the Auxiliary Backplane.

To install the Auxiliary Backplane (Figure 3-24):

.Procedure

1.Remove the power transformer unit from the front of the 3000 Series Carrier.

2.Remove the NIM, if present, from the back of the 3000 Series Carrier.

3.If the carrier is already installed in a cabinet with equipment located below, place a cardboard or paper pad from the front perpendicular to the main backplane at the bottom of the carrier to catch any hardware that may fall below.

4.Use a 1/4″ nut driver to remove the two metal hexagonal standoffs on either side of connectors P23 and P24, if mounting the Auxiliary Backplane on the right side, or P25 and P26 if mounting the backplane on the left. Refer to Figure 3-7.

5.Insert the custom hexagonal standoffs into the

existing standoff holes from the rear, then use the long-nose pliers and a 5/16″ nut driver to install the nylon insulating washers and No. 5 nuts from the front of the carrier.

6.Tighten the nuts with the 5/16″ and 1/4″ nut drivers.

7.Determine which screw holes you need to use to mount the Auxiliary Backplane using the six screws provided.

The backplane has pointer symbols next to the center and bottom rows of screw holes (refer to the Figure 3-24). If you are mounting the backplane on the right side of the rear of the carrier, use the two screw holes with the pointers facing to the right. If mounting the backplane on the left side, use the holes with the pointers facing left.

For the top row, use the same screw holes for mounting on either side.

8.Align the backplane using the custom standoffs at the bottom and the corresponding holes on the bottom row of the backplane.

9.Insert and finger-tighten the two bottom row screws (3/4″ length). If you are mounting the

backplane on the left side, you must insert the small 3/8″ screw into the open slot at the lower left side of the backplane.

10.Insert and finger-tighten the two top row screws (1″ length).

11.Insert and finger-tighten the two center row screws (1″ length).

12.Using a screwdriver, tighten all the screws. Be careful not to use excessive force.

13.Ensure that the rubber pad is properly attached to the black plastic T1 network cable retainer (Figure 3-23).

This plastic cable retainer secures the T1 connecting cable once it is plugged in.

NOTE

Do not install the cable retainer if you will be installing a Telco connector cable with a straight cable entry. Instead, secure this cable using the screw lock provided on each side of the T1 network connector.

Figure 3-23. T1 Network Cable Retainer

3-34 December 1994 3000-A2-GA31-80