The cables are hot-removable and hot-insertable. A cable consists of a cable assembly
that connects directly into two SFP+ modules, one at each end of the cable. The cables
use integrated duplex serial data links for bidirectional communication and are designed
for data rates up to 10 Gbps. There are two types of DAC cables:
•
Passive DAC cables have no signal amplification built into the cable assembly. The
Hardware Compatibility Tool and Table 41 on page 127 describe the passive DAC cable
specifications.
•
Active DAC cables have signal amplification and equalization built into the cable
assembly. The Hardware Compatibility Tool and Table 42 on page 130 describe the
active DAC cable specifications.
Table 41: SFP+ Passive Direct Attach Copper Cable Specifications
SpecificationsProduct Number
10-Gbps full-duplex serial transmissionRateQFX-SFP-DAC-1M
None. SFPs are permanently attached.Connector type
3.3 VSupply voltage
0.015 WPower consumption (per end)
–40
°
C to 85
°
CStorage temperature
TwinaxCable type
30 AWGWire AWG
1 in. (2.54 cm)Minimum cable bend radius
100 ohmsCable characteristic impedance
1% maximumCrosstalk between pairs
4.3 nsec/mTime delay
1 m (3.3 ft)Length
127Copyright © 2016, Juniper Networks, Inc.
Chapter 8: Port and Interface Specifications
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