NOTE: We recommendthat you use only QSFP+ DAC cables purchased from
Juniper Networks with your Juniper Networks device.
CAUTION: If you face a problem running a Juniper Networks device that uses
a third-party optic or cable, the Juniper Networks Technical AssistanceCenter
(JTAC) can help you diagnose the source of the problem. Your JTAC engineer
might recommend that youcheck the third-partyoptic or cableand potentially
replace it with an equivalent Juniper Networks optic or cable that is qualified
for the device.
Table 58 on page 140 describes the cable specifications.
Table 58: QSFP+ Direct Attach Copper Cable Specifications
ValueSpecificationModel Number
40-Gbps full-duplex serial transmissionRateEX-QSFP-40GE-DAC-50CM
QSFP+ passive Twinax cable assemblyConnector type
3.3 VSupply voltage
0.015 WPower consumption (per end)
–40° C through 85° CStorage temperature
TwinaxCable type
30 AWGWire AWG
2.54 cm (1 in.)Minimum cable bend radius
100 ohmsCable characteristic impedance
1% maximumCrosstalk between pairs
4.3 nsec/ftTime delay
1.6 ft (0.5 m)Length
Copyright © 2017, Juniper Networks, Inc.140
EX9208 Switch Hardware Guide