Installing Cables. Procedures in Upward Cabling Mode. Installing STM-1 Cables. Procedures in Downward Cabling Mode, страница 11

1. Ethernet cable

2. Cabling hole for signal cables

3. Subrack cabling trough

4. Post

Figure 7-24 Wire the Ethernet cable in upward cabling mode

7.5.2  Procedures in Downward Cabling Mode

Step	Operation
1	Before installing the cable, attach temporary marks to its both ends for distinguishing.
2	Connect the connector of the Ethernet cable to the Ethernet interface on JSCC.
3	Wire the Ethernet cables on the left in the subrack cabling trough below JSCC and lead them out. Route them downward along the post and then route them to pass through the cabling hole for signal cables at the bottom of the cabinet, as shown in Figure 7-25.
4	Remove the temporary marks and attach the cable labels 2 cm away from the connectors at the two ends. In doing so, refer to section 7.2 “Installing STM-1 Cable”.

1. Ethernet cable

2. Cabling hole for signal cables

3. Subrack cabling trough

4. Post

Figure 7-25 Wire the Ethernet cable in downward cabling mode

7.5.3  Installation Check

n  The cable labels are attached neatly at two ends of the cables, facing the same direction. The contents on them are filled in correctly and clearly.

n  The cables are bound with appropriate tightness. The space between the cable ties should be even and the overall appearance of the cabling nice. All cable ties should face the same direction.

n  The cables and connectors are intact and connected correctly and firmly.

n  The cables should be laid in such a way as to facilitate maintenance and capacity expansion.

n  The actual cable routing complies with the design.

7.6  Installation Check Points

The following requirements should be satisfied when the cable installation is completed:

n  All cables are bound with appropriate tightness. The space between the cable ties are even, and the remaining parts of the cable ties are cut off neatly. All cable ties face the same direction, thus keeping the overall appearance nice.

n  All cables are wired smoothly, with no roundabout twists or turns.

n  When a trough is used for routing cables outside the cabinet, do not make the cables overflow the trough.

n  Cables shall be secured on the beam of the cabling ladder, if any. They shall be bound neatly in rectangle shape (or in circular shape when the cables are single-cored).

n  If necessary, bend the cables in a radius as large as possible. The cables cannot be bound at any turn.

n  The –48 V power cable shall be blue, GND (BGND) cable be black (red), and PGND cable be yellow/green or yellow.

n  The power cable and grounding cable are connected correctly and firmly. For this purpose, check whether the bolt for the connection terminal is tightened.

n  The diameter of the power cable and grounding cable meets the power distribution requirements.

n  The external power cable and grounding cable are arranged separately from signal cables, with a space more than 3 cm between.

n  The power cable and grounding cable are bent smoothly.

n  The power cable and grounding cable must be made of an entire piece of copper core, without any joint in the middle.

n  Labels for the power cable and grounding cable are filled in and affixed to the cables as required. All labels are neat and face the same direction. It is recommended that labels be affixed 2 cm away from the connectors.