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4.3.3 Changing Crossbar Cables


4.3.3 Changing Crossbar Cables
When subsequently adding expansion rack 2, you need to change the connections of crossbar cables. This work is not necessary during the initial installation.
  1. Mount a crossbar unit in XBBOX#80/#81.
    a. Remove the one screw (B in Figure 4-20) securing the blank panel.

    b. Remove the blank panel (A in Figure 4-20) from slot #2, where the crossbar unit is to be installed.

    c. Insert the crossbar unit into slot #2. The crossbar unit is supplied with expansion rack 2.

    d. Close the left and right levers of the crossbar unit, and tighten two screws (A in Figure 4-21).
Figure 4-20  Removing the Blank Panel
Figure 4-20  Removing the Blank Panel
Figure 4-21  Mounting the Crossbar Unit
Figure 4-21  Mounting the Crossbar Unit
  1. Move the crossbar cables of XBBOX#80/#81.
    a. Remove the crossbar cables from L4 to L7 and from R4 to R7 of XBU#1 (see Figure 4-22). Hold the pull-tab (A in Figure 4-23) of the crossbar cable, and pull it straight in the direction of the arrow to remove the cable.
Note - Do not pull it out with a hold on the cable. Doing so prevents the connector lock from being completely released, causing damage.
Figure 4-22  Moving Cables of XBBOX#80/#81
Figure 4-22  Moving Cables of XBBOX#80/#81
Figure 4-23  Crossbar Cable Pull-Tab and Pulling Direction
Figure 4-23  Crossbar Cable Pull-Tab and Pulling Direction
  1. b. Replace the labels on the removed cables. The replacement labels are supplied with expansion rack 2. Referring to Table 4-1, replace the labels.
Table 4-1  Label Replacement Table
Before Change   After Change
XB80-XBU1-L4 Pink
->
XB80-XBU2-L0 Pink
XB80-XBU1-L4 Black
->
XB80-XBU2-L0 Black
XB80-XBU1-L5 Pink
->
XB80-XBU2-L1 Pink
XB80-XBU1-L5 Black
->
XB80-XBU2-L1 Black
XB80-XBU1-L6 Pink
->
XB80-XBU2-L2 Pink
XB80-XBU1-L6 Black
->
XB80-XBU2-L2 Black
XB80-XBU1-L7 Pink
->
XB80-XBU2-L3 Pink
XB80-XBU1-L7 Black
->
XB80-XBU2-L3 Black
XB80-XBU1-R4 Light blue
->
XB80-XBU2-R0 Light blue
XB80-XBU1-R4 Black
->
XB80-XBU2-R0 Black
XB80-XBU1-R5 Light blue
->
XB80-XBU2-R1 Light blue
XB80-XBU1-R5 Black
->
XB80-XBU2-R1 Black
XB80-XBU1-R6 Light blue
->
XB80-XBU2-R2 Light blue
XB80-XBU1-R6 Black
->
XB80-XBU2-R2 Black
XB80-XBU1-R7 Light blue
->
XB80-XBU2-R3 Light blue
XB80-XBU1-R7 Black
->
XB80-XBU2-R3 Black
XB81-XBU1-L4 Pink
->
XB81-XBU2-L0 Pink
XB81-XBU1-L4 Black
->
XB81-XBU2-L0 Black
XB81-XBU1-L5 Pink
->
XB81-XBU2-L1 Pink
XB81-XBU1-L5 Black
->
XB81-XBU2-L1 Black
XB81-XBU1-L6 Pink
->
XB81-XBU2-L2 Pink
XB81-XBU1-L6 Black
->
XB81-XBU2-L2 Black
XB81-XBU1-L7 Pink
->
XB81-XBU2-L3 Pink
XB81-XBU1-L7 Black
->
XB81-XBU2-L3 Black
XB81-XBU1-R4 Light blue
->
XB81-XBU2-R0 Light blue
XB81-XBU1-R4 Black
->
XB81-XBU2-R0 Black
XB81-XBU1-R5 Light blue
->
XB81-XBU2-R1 Light blue
XB81-XBU1-R5 Black
->
XB81-XBU2-R1 Black
XB81-XBU1-R6 Light blue
->
XB81-XBU2-R2 Light blue
XB81-XBU1-R6 Black
->
XB81-XBU2-R2 Black
XB81-XBU1-R7 Light blue
->
XB81-XBU2-R3 Light blue
XB81-XBU1-R7 Black
->
XB81-XBU2-R3 Black
  1. c. Connect crossbar cables to L0 to L3 and to R0 to R3 of XBU#2.
    Mount the cables according to the labels.
    Hold the connector of the crossbar cable, and insert it straight into the opening.
    Do not hold the cable or its pull-tab part when inserting it.
Note - If you insert a connector with the pull-tab pulled, the connector may be damaged.
Note - There are three types of crossbar cable (optical). Connect crossbar cables of the same type to the same port numbers.
You can distinguish the type of crossbar cable by the pull-tab shape (A in Figure 4-15).
Note - A loose crossbar cable connection may, on rare occasions, cause an error due to poor connection. After connecting a crossbar cable, push it in again so that it is tightly in place to prevent any improper connection. Do not hold only the fiber optic cable when performing the work at this time. Otherwise, the fiber optic cable may bend out of shape. For details, see step 4 in "4.3.2 Crossbar Cable Connections via a Crossbar Box."
  1. Move the crossbar cables of BB#04 to BB#07.
    a. Remove the crossbar cables from 1L and 1R of XBU#0/XBU#1.
Figure 4-24  Moving BB#07 Cables from BB#04
Figure 4-24  Moving BB#07 Cables from BB#04
  1. b. Replace the labels on the removed cables.
    The replacement labels are supplied with expansion rack 2. Referring to Table 4-2, replace the labels.
Table 4-2  Label Replacement Table
Before Change   After Change
BB04-XBU0-1L Pink
->
BB04-XBU0-2L Pink
BB04-XBU0-1L Black
->
BB04-XBU0-2L Black
BB04-XBU0-1R Light blue
->
BB04-XBU0-2R Light blue
BB04-XBU0-1R Black
->
BB04-XBU0-2R Black
BB04-XBU1-1L Pink
->
BB04-XBU1-2L Pink
BB04-XBU1-1L Black
->
BB04-XBU1-2L Black
BB04-XBU1-1R Light blue
->
BB04-XBU1-2R Light blue
BB04-XBU1-1R Black
->
BB04-XBU1-2R Black
BB05-XBU0-1L Pink
->
BB05-XBU0-2L Pink
BB05-XBU0-1L Black
->
BB05-XBU0-2L Black
BB05-XBU0-1R Light blue
->
BB05-XBU0-2R Light blue
BB05-XBU0-1R Black
->
BB05-XBU0-2R Black
BB05-XBU1-1L Pink
->
BB05-XBU1-2L Pink
BB05-XBU1-1L Black
->
BB05-XBU1-2L Black
BB05-XBU1-1R Light blue
->
BB05-XBU1-2R Light blue
BB05-XBU1-1R Black
->
BB05-XBU1-2R Black
BB06-XBU0-1L Pink
->
BB06-XBU0-2L Pink
BB06-XBU0-1L Black
->
BB06-XBU0-2L Black
BB06-XBU0-1R Light blue
->
BB06-XBU0-2R Light blue
BB06-XBU0-1R Black
->
BB06-XBU0-2R Black
BB06-XBU1-1L Pink
->
BB06-XBU1-2L Pink
BB06-XBU1-1L Black
->
BB06-XBU1-2L Black
BB06-XBU1-1R Light blue
->
BB06-XBU1-2R Light blue
BB06-XBU1-1R Black
->
BB06-XBU1-2R Black
BB07-XBU0-1L Pink
->
BB07-XBU0-2L Pink
BB07-XBU0-1L Black
->
BB07-XBU0-2L Black
BB07-XBU0-1R Light blue
->
BB07-XBU0-2R Light blue
BB07-XBU0-1R Black
->
BB07-XBU0-2R Black
BB07-XBU1-1L Pink
->
BB07-XBU1-2L Pink
BB07-XBU1-1L Black
->
BB07-XBU1-2L Black
BB07-XBU1-1R Light blue
->
BB07-XBU1-2R Light blue
BB07-XBU1-1R Black
->
BB07-XBU1-2R Black
  1. c. Connect crossbar cables to 2L and 2R of XBU#0/XBU#1.
    Mount the cables according to the labels.
    Connect crossbar cables to the crossbar unit.
    Hold the connector of the crossbar cable, and insert it straight into the opening.
    Do not hold the cable or its pull-tab part when inserting it.
Note - If you insert a connector with the pull-tab pulled, the connector may be damaged.
Note - A loose crossbar cable connection may, on rare occasions, cause an error due to poor connection. After connecting a crossbar cable, push it in again so that it is tightly in place to prevent any improper connection. Do not hold only the fiber optic cable when performing the work at this time. Otherwise, the fiber optic cable may bend out of shape. For details, see step 4 in "4.3.2 Crossbar Cable Connections via a Crossbar Box."