What type of connection does Q40-Q40-C provide between two network devices?

A direct 40 Gigabit Ethernet connection. Q40-Q40-C has a 40G QSFP+ connector at each end and links two compatible QSFP+ ports without dividing the connection into lower-speed branches.

What cable lengths are available for Q40-Q40-C, and where are they intended to be deployed?

From 0.5m to 5m. These passive copper lengths are intended for short-distance connections within the same data center rack or between adjacent racks, including switch-to-switch and switch-to-server links.

Can Q40-Q40-C break one 40G QSFP+ port into four 10G SFP+ connections?

No. Q40-Q40-C is a straight-through QSFP+ to QSFP+ cable and maintains one 40G connection between its two ends. A QSFP+ to 4x SFP+ breakout cable has a different connector configuration.

Does Q40-Q40-C require separate optical transceivers or fiber patch cables?

No. Q40-Q40-C is an integrated passive twinax copper assembly with QSFP+ connectors already attached at both ends. It plugs directly into compatible 40G QSFP+ ports without separate optical modules or fiber cabling.

How does Q40-Q40-C carry a 40Gb/s Ethernet signal through its QSFP+ interfaces?

It uses four parallel electrical lanes. Under the 40GBASE-CR4 architecture defined for IEEE 802.3ba, each lane operates at a nominal signaling rate of 10.3125 GBd to support the complete 40Gb/s Ethernet link.

Can AICPLIGHT check whether Q40-Q40-C will work with a specific switch, server, or network adapter?

Yes. Customers can provide the exact equipment model and QSFP+ port information to AICPLIGHT for a compatibility check before ordering Q40-Q40-C.

40G QSFP+ DAC

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40G QSFP+ to 40G QSFP+ Passive Direct Attach Copper Twinax Cable

Q40-Q40-C

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US$27.00
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40G QSFP+ DAC Overview

The 40G QSFP+ DAC category contains one passive direct attach copper twinax cable for short-distance 40G Ethernet connections. Q40-Q40-C uses 40G QSFP+ connectors at both ends to create a direct link between compatible network ports and is available in lengths from 0.5m to 5m. Compliant with IEEE 802.3ba and QSFP MSA specifications, the cable is designed for high-speed connections within a data center rack or between adjacent racks, including links between switches, servers, and other QSFP+-equipped network devices.

FAQ

What type of connection does Q40-Q40-C provide between two network devices?: A direct 40 Gigabit Ethernet connection. Q40-Q40-C has a 40G QSFP+ connector at each end and links two compatible QSFP+ ports without dividing the connection into lower-speed branches.
What cable lengths are available for Q40-Q40-C, and where are they intended to be deployed?: From 0.5m to 5m. These passive copper lengths are intended for short-distance connections within the same data center rack or between adjacent racks, including switch-to-switch and switch-to-server links.
Can Q40-Q40-C break one 40G QSFP+ port into four 10G SFP+ connections?: No. Q40-Q40-C is a straight-through QSFP+ to QSFP+ cable and maintains one 40G connection between its two ends. A QSFP+ to 4x SFP+ breakout cable has a different connector configuration.
Does Q40-Q40-C require separate optical transceivers or fiber patch cables?: No. Q40-Q40-C is an integrated passive twinax copper assembly with QSFP+ connectors already attached at both ends. It plugs directly into compatible 40G QSFP+ ports without separate optical modules or fiber cabling.
How does Q40-Q40-C carry a 40Gb/s Ethernet signal through its QSFP+ interfaces?: It uses four parallel electrical lanes. Under the 40GBASE-CR4 architecture defined for IEEE 802.3ba, each lane operates at a nominal signaling rate of 10.3125 GBd to support the complete 40Gb/s Ethernet link.
Can AICPLIGHT check whether Q40-Q40-C will work with a specific switch, server, or network adapter?: Yes. Customers can provide the exact equipment model and QSFP+ port information to AICPLIGHT for a compatibility check before ordering Q40-Q40-C.