Technical Documentation

SFP+ Direct Attach Cables for EX4500 and EX8200 Switches

Small form-factor pluggable plus transceiver (SFP+) direct attach copper cables, also known as Twinax cables, are suitable for in-rack connections between servers and switches. They are suitable for short distances up to 7 m, making them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks.

This topic describes:

Cable Specifications

Juniper Networks SFP+ direct attach cables are available in three lengths:

  • 1 m (3.3 ft)
  • 3 m (9.9 ft)
  • 7 m (23 ft)

Note: When you use SFP+ direct attach cables with your EX4500 and EX8200 switches, we recommend that you use only Juniper Networks SFP+ direct attach cables.

The cables are hot-removable and hot-insertable. A cable comprises a low-voltage cable assembly that connects directly into two SFP+ modules, 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 up to 10 Gbps.

Table 1 describes the cable specifications.

Table 1: SFP+ Direct Attach Cable Specifications

Model

Specification

 

EX-SFP-10GE-DAC-1m

Rate

10 Gbps full-duplex serial transmission

Connector type

SFP+ passive Twinax cable assembly

Supply voltage

3.3 V

Power consumption (per end)

0.57 W

Storage temperature

-40°C to 85°C

Cable type

Twinax

Wire AWG

30 AWG

Minimum cable bend radius

1 in.

Cable characteristic impedance

100 ohm

Crosstalk between pairs

2% maximum

Time delay

1.31 nsec/ft

Length

1 m (3.3 ft)

EX-SFP-10GE-DAC-3m

Rate

10 Gbps full-duplex serial transmission

Connector type

SFP+ passive Twinax cable assembly

Supply voltage

3.3 V

Power consumption (per end)

0.57 W

Storage temperature

-40°C to 85°C

Cable type

Twinax

Wire AWG

30 AWG

Minimum cable bend radius

1 in.

Cable characteristic impedance

100 ohm

Crosstalk between pairs

2% maximum

Time delay

1.31 nsec/ft

Length

3 m (9.9 ft)

EX-SFP-10GE-DAC-7m

Rate

10 Gbps full-duplex serial transmission

Connector type

SFP+ passive Twinax cable assembly

Supply voltage

3.3 V

Power consumption (per end)

0.57 W

Storage temperature

-40°C to 85°C

Cable type

Twinax

Wire AWG

24 AWG

Minimum cable bend radius

2 in.

Cable characteristic impedance

100 ohm

Crosstalk between pairs

2% maximum

Time delay

1.31 nsec/ft

Length

7 m (23 ft)

Standards Supported by These Cables

The cables comply with the following standards:


Published: 2010-04-28