Cable Specifications; Cable Specifications For Qsfp+ And Qsfp28 Transceivers; Cable Specifications For Console And Management Connections For The Qfx; Series - Juniper QFX5100 Hardware Manual

CHAPTER 9

Cable Specifications

Cable Specifications for QSFP+ and QSFP28 Transceivers

Table 52: QSFP+ MPO Cable Signals

Fiber
1
Copyright © 2016, Juniper Networks, Inc.
Cable Specifications for QSFP+ and QSFP28 Transceivers on page 147

Cable Specifications for Console and Management Connections for the QFX

Series on page 149
Understanding QFX Series Fiber-Optic Cable Signal Loss, Attenuation, and
Dispersion on page 150
Calculating the Fiber-Optic Cable Power Budget for a QFX Series Device on page 151
Calculating the Fiber-Optic Cable Power Margin for a QFX Series Device on page 152
Copper Cable Specifications for QFX5100-48T Switches on page 153
The 40-Gigabit Ethernet QSFP+ and 100-Gigabit Ethernet QSFP28 transceivers that are
used in QFX Series and EX4600 switches use 12-ribbon multimode fiber crossover cables
with female MPO/UPC connectors. The fiber can be either OM3 or OM4. These cables
are not sold by Juniper Networks.
CAUTION: To maintain agency approvals, use only a properly constructed,
shielded 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+ or QSFP28
transceivers, ensure that the proper polarity is maintained through the cable
plant.
Table 52 on page 147 describes the signals on each fiber.
pin-to-pin connections for proper polarity.
Signal
Tx0 (Transmit)
Table 53 on page 148 shows the
147