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    Interface Specifications for SFP+ DAC Cables for the EX4600 Switch

    Small form-factor pluggable plus (SFP+) direct attach copper (DAC) cables, also known as Twinax cables, are suitable for in-rack connections between servers and EX4600 switches.

    EX4600 switches support third-party DAC cables starting with the Junos OS 13.2X51-D25 release. We highly recommend using Juniper Network DAC cables. If you choose to use a third-party cable, it should meet the specifications described in Table 1 and Table 2.

    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.

    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:

    Table 1: SFP+ Passive Direct Attach Copper Cable Specifications

    Product Number

    Specifications

    QFX-SFP-DAC-1M

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.015 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    1% maximum

    Time delay

    4.3 nsec/m

    Length

    1 m (3.3 ft)

    QFX-SFP-DAC-3M

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.015 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    1% maximum

    Time delay

    4.3 nsec/m

    Length

    3 m (9.9 ft)

    QFX-SFP-DAC-5M

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.015 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    24 AWG

    Minimum cable bend radius

    1.25 in. (3.2 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Time delay

    4.3 nsec/m

    Length

    5 m (16.4 ft)

    Table 2: SFP+ Active Direct Attach Copper Cable Specifications

    Product Number

    Specifications

    QFX-SFP-DAC-1MA

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.627 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Length

    1 m (3.3 ft)

    QFX-SFP-DAC-3MA

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.627 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Length

    3 m (9.9 ft)

    QFX-SFP-DAC-5MA

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.627 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Length

    5 m (16.4 ft)

    QFX-SFP-DAC-7MA

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.627 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    30 AWG

    Minimum cable bend radius

    1 in. (2.54 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Length

    7 m (23 ft)

    QFX-SFP-DAC-10MA

    Rate

    10-Gbps full-duplex serial transmission

    Connector type

    None. SFPs are permanently attached.

    Supply voltage

    3.3 V

    Power consumption (per end)

    0.627 W

    Storage temperature

    –40° C to 85° C

    Cable type

    Twinax

    Wire AWG

    28 AWG

    Minimum cable bend radius

    2 in. (5 cm)

    Cable characteristic impedance

    100 ohms

    Crosstalk between pairs

    2% maximum

    Length

    10 m (32.8 ft)

    Modified: 2016-07-22