Juniper ACX5048 Hardware Manual page 90

CAUTION:
cable.
TIP: Ensure that you order cables with the correct polarity. Vendors refer to these crossover
cables as key up to key up, latch up to latch up, Type B, or Method B. If you are using patch panels
between two QSFP+ transceivers or two QSFP28 transceivers, ensure that the proper polarity
is maintained through the cable plant.
Table 29 on page 90 describes the signals on each fiber.
connections for proper polarity.
Table 29: QSFP+ MPO Cable Signals
Fiber
1
2
3
4
5
6
7
8
9
10
11
12
To maintain agency approvals, use only a properly constructed, shielded
Signal
Tx0 (Transmit)
Tx1 (Transmit)
Tx2 (Transmit)
Tx3 (Transmit)
Unused
Unused
Unused
Unused
Rx3 (Receive)
Rx2 (Receive)
Rx1 (Receive)
Rx0 (Receive)
Table 30 on page 91 shows the pin-to-pin
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