Информатика и выч. техника \ Мультисервисные сети

Installing Cables. Procedures in Upward Cabling Mode. Installing STM-1 Cables. Procedures in Downward Cabling Mode, страница 8

1. Alarm input interface

2. Interface for driving cabinet alarm indicators

3. Alarm output interface

4. Alarm concatenation interface

Figure 7-14 Positions of alarm interfaces

1. External alarm cables

2. Cabling hole for signal cables

3. Post

4. Alarm input cable

5. Cabinet indicator driving cable

6. Alarm output cable

7. Alarm concatenation cable

8. Subrack cabling trough

Figure 7-15 Wire the external alarm cables in upward cabling mode

1. Alarm input cable

2. Alarm concatenation cable

3. Alarm output cable

Figure 7-16 Connect external alarm cable between cabinets

7.3.2  Procedures in Downward Cabling Mode

Step

Operation

1

Determine the external alarm cables (as shown in Figure 7-13) and their pin assignment (as shown in Table 7-3, Table 7-4, Table 7-5, and Table 7-6). Figure 7-14 shows the positions for alarm interfaces.

2

Before installing the cables, attach temporary marks to their both ends to distinguish them.

3

Connect connectors of the external alarm cables to the interfaces on EMPU.

4

Wire the external alarm cables on the left in the subrack cabling trough below EMPU 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 7-17.

5

Bind the external alarm cables properly, as shown in Figure 7-17.

6

Remove the temporary marks and attach the cable labels 2 cm away from the connectors at both ends. In doing so, refer to section 7.2 “Installing STM-1 Cable”.

1. External alarm cables

2. Cabling hole for signal cables

3. Subrack cabling trough

4. Post

5. Alarm input cable

6. Alarm output cable

7. Alarm concatenation cable

Figure 7-17 Wire the external alarm cables in downward cabling mode

7.3.3  Installation Check

n  The cable labels are attached neatly at both 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.


7.4  Installing Clock Cables

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