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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
What Are the Pin Assignments of MPO Fibers?

What Are the Pin Assignments of MPO Fibers?

  • The MPO-MPO, MPO-2*MPO, and MPO-3*MPO fibers have similar appearances except for the number of MPO connectors at the other end (1, 2, and 3 respectively).
  • The MPO-4*DLC, MPO-8*DLC, MPO-10*DLC, and MPO-12*DLC fibers have similar appearances except for the number of DLC connectors at the other end (4, 8, 10, and 12 pairs respectively).

Figure 22-50 shows the structure of an MPO-MPO fiber used for a 40GE optical module, and Table 22-27 lists its pin assignments.

Figure 22-50 Structure of an MPO-MPO fiber used for a 40GE optical module

Table 22-27 Pin assignments of an MPO-MPO fiber used for a 40GE optical module

X1 Pin

X2 Pin

1

12

2

11

3

10

4

9

9

4

10

3

11

2

12

1

Figure 22-51 shows the structure of an MPO-MPO fiber used for a 100GE optical module, and Table 22-28 lists its pin assignments.

Figure 22-51 Structure of an MPO-MPO fiber used for a 100GE optical module

Table 22-28 Pin assignments of an MPO-MPO fiber used for a 100GE optical module

X1 Pin

X2 Pin

X1 Pin

X2 Pin

1

24

13

12

2

23

14

11

3

22

15

10

4

21

16

9

5

20

17

8

6

19

18

7

7

18

19

6

8

17

20

5

9

16

21

4

10

15

22

3

11

14

23

2

12

13

24

1

Figure 22-52 and Figure 22-53 show the structures of MPO-4*DLC and MPO-8*FC fibers. Their ping assignments are the same, as listed in Table 22-29.

Figure 22-52 Structure of an MPO-4*DLC fiber

Figure 22-53 Structure of an MPO-8*FC fiber

Table 22-29 Pin assignments of MPO-4*DLC and MPO-8*FC fibers

X1 Pin

X2 Pin

1

1B

2

2B

3

3B

4

4B

9

4A

10

3A

11

2A

12

1A

Figure 22-54 shows the structure of an MPO-2*MPO fiber, and Table 22-30 lists its pin assignments.

Figure 22-54 Structure of an MPO-2*MPO fiber

Table 22-30 Pin assignments of an MPO-2*MPO fiber

X1 Pin

X2 Pin

X3 Pin

2

12

NA

3

11

NA

4

10

NA

5

9

NA

7

NA

12

8

NA

11

9

NA

10

10

NA

9

14

1

NA

15

2

NA

16

3

NA

17

4

NA

19

NA

1

20

NA

2

21

NA

3

22

NA

4

Figure 22-55 shows the structure of an MPO-3*MPO fiber, and Table 22-31 lists its pin assignments.

Figure 22-55 Structure of an MPO-3*MPO fiber

Table 22-31 Pin assignments of an MPO-3*MPO fiber

X1 Pin

X2 Pin

X3 Pin

X4 Pin

1

NA

NA

9

2

12

NA

NA

3

11

NA

NA

4

10

NA

NA

5

9

NA

NA

6

NA

12

NA

7

NA

11

NA

8

NA

10

NA

9

NA

9

NA

10

NA

NA

12

11

NA

NA

11

12

NA

NA

10

13

NA

NA

4

14

1

NA

NA

15

2

NA

NA

16

3

NA

NA

17

4

NA

NA

18

NA

1

NA

19

NA

2

NA

20

NA

3

NA

21

NA

4

NA

22

NA

NA

1

23

NA

NA

2

24

NA

NA

3

Figure 22-56 shows the structure of an MPO-8*DLC fiber, and Table 22-32 lists its pin assignments.

Figure 22-56 Structure of an MPO-8*DLC fiber

Table 22-32 Pin assignments of an MPO-8*DLC fiber

X1 Pin

X2 Pin

X1 Pin

X2 Pin

2

1A

14

1B

3

2A

15

2B

4

3A

16

3B

5

4A

17

4B

7

5A

19

5B

8

6A

20

6B

9

7A

21

7B

10

8A

22

8B

Figure 22-57 shows the structure of an MPO-10*DLC fiber, and Table 22-33 lists its pin assignments.

If a 100GE interface is split into eight 10GE interfaces, pins 5A/5B and 10A/10B of the MPO-10*DLC fiber become unusable. The first to fourth 10GE ports use the pins 1A/1B, 2A/2B, 3A/3B, and 4A/4B respectively; the fifth 10GE interface uses pins 6A/6B; the sixth to eighth 10GE interfaces use pins 7A/7B, 8A/8B, and 9A/9B respectively.

Figure 22-57 Structure of an MPO-10*DLC fiber

Table 22-33 Pin assignments of an MPO-10*DLC fiber

X1 Pin

X2 Pin

X1 Pin

X2 Pin

2

1A

14

1B

3

2A

15

2B

4

3A

16

3B

5

4A

17

4B

6

5A

18

5B

7

6A

19

6B

8

7A

20

7B

9

8A

21

8B

10

9A

22

9B

11

10A

23

10B

Figure 22-58 shows the structure of an MPO-12*DLC fiber, and Table 22-34 lists its pin assignments.

Figure 22-58 Structure of an MPO-12*DLC fiber

Table 22-34 Pin assignments of an MPO-12*DLC fiber

X1 Pin

X2 Pin

X1 Pin

X2 Pin

1

1A

13

1B

2

2A

14

2B

3

3A

15

3B

4

4A

16

4B

5

5A

17

5B

6

6A

18

6B

7

7A

19

7B

8

8A

20

8B

9

9A

21

9B

10

10A

22

10B

11

11A

23

11B

12

12A

24

12B

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Updated: 2020-01-07

Document ID: EDOC1000060766

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