Juniper EX4650 Series, Hardware Manual, Page: 66 / 195

CAUTION: If you face a problem running a Juniper Networks device that uses a third-party
optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you
diagnose the source of the problem. Your JTAC engineer might recommend that you
check the third-party optic or cable and potentially replace it with an equivalent Juniper
Networks optic or cable that is qualified for the device.
Cable Specifications
EX4650 switches support SFP28 passive DAC cables. The passive Twinax cable is a straight cable with no
active electronic components. EX4650 switches support 1 m, 3 m, and 5 m long SFP28 passive DAC
cables. See Figure 30 on page 67 .
Figure 30: SFP28 Direct Attach Copper Cables for EX4650 Switches
The cables are hot-removable and hot-insertable: You can remove and replace them without powering
off the switch or disrupting switch functions. A cable comprises a low-voltage cable assembly that connects
directly into two 25-Gigabit Ethernet ports, one at each end of the cable. The cables use high-performance
integrated duplex serial data links for bidirectional communication and are designed for data rates of up
to 25 Gbps.
Standards Supported by These Cables
The cables comply with the following standards:
•
SFP mechanical standard SFF-8431— see ftp://ftp.seagate.com/sff/SFF-8431.PDF .
•
Electrical interface standard SFF-8432— see ftp://ftp.seagate.com/sff/SFF-8432.PDF .
•
SFP+ Multi-Source Alliance (MSA) standards
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