Calculating The Fiber-Optic Cable Power Budget For Qfx Series Switches - Juniper QFX5120 Series Hardware Manual

Table 29: QSFP+ and QSFP28 MPO Cable Signals (continued)
Fiber
11
12
Table 30 on page 78 shows the pin-to-pin connections for proper polarity
Table 30: QSFP+ and QSFP28 MPO Fiber-Optic Crossover Cable Pinouts
Pin
1
2
3
4
5
6
7
8
9
10
11
12

Calculating the Fiber-Optic Cable Power Budget for QFX Series Switches

Calculate the fiber-optic data link's power budget when planning fiber-optic cable layout and distances to
ensure that fiber-optic connections have sufficient power for correct operation. The power budget is the
maximum amount of power the link can transmit. When you calculate the power budget, you use a
Signal
Rx1 (Receive)
Rx0 (Receive)
Pin
12
11
10
9
8
7
6
5
4
3
2
1
78