The 4.9' QSFP28 100GbE Break Out Four SPF28 25GbE Twinaxial Direct Attach Cable from QNAP is a networking cable that is compatible with 100/25GbE NICs on supported NAS enclosures and arrays, plus switches. On one end, there is a 100GbE QSFP28 interface, while the other end breaks out into four 25GbE SFP28 interfaces.

Compatible with Select QNAP NAS Units    Supports 100 and 25 Gigabit Ethernet    1 x 100GbE QSFP28 Interface    4 x 25GbE SFP28 Interfaces

Related Questions and Answers

Q: 1. Does this support Truenas?

A: This card was designed for QNAP, Windows, and Linux.

Q: 2. Are the overall dimensions of the protector 39.8x4.9? If so, what are the dimensions of the "internal" channel?

A: The measurement for the channel of the Pyle Pro Drop-Over Cable Protector Ramp (4.9 x 39.8") is not published. The Maximum cable diameter for the channel is .5".

Q: 3. What are the dimensions of the cable channel itself?

A: The interior chanel of the Pyle Pro Drop-Over Cable Protector Ramp (4.9 x 39.8") is 39.8'' x 4.9'' x 0.8'' inches (L x W x H).

Q: 4. So in essence, with the right breakout cables (QSFP28 to 4 x SFP28) the switch can support 24 (4x4 + 8) SFP28 ports?

A: The QNAP QSW-M7308R-4X 12-Port 100G QSFP28 / 25G SFP28 Managed Network Switch, B&H # QNQSWM7308R4, does not support breakout cables.

Q: 5. will 1/2" conduit go under it

A: The Pyle Pro Protective Cable & Wire Concealment Ramp Track (4.9 x 39.8") (B&H# PYPCBLCO19) allows for up to 1/2" outside diameter conduit or cable to fit underneath it.

Q: 6. Will this work on a current Mac Pro?

A: No, the QNAP QXG-25G2SF-CX6 Dual-Port 25GbE PCIe 4.0 x8 Network Expansion Card only supports Windows, Linux, and QNAP operating systems. It is not compatible with the Mac Pro.

Q: 7. Does this model include the QSFP+ optical module ? Also, we have Intel 40Gb/s XL710-QDA2 , will the cable that plugs into it, plug into this ATTO card ? Or will we need to change the cable ? Regards

A: This module uses SFP28, which is cross-compatible with SFP+. However, SFP28 supports a speed of 25 Gb/s with higher bandwidth than SFP+, so although it will work with an SFP+ connection you will not realize the full capabilities of SFP28.

Q: 8. Does this work with Intel x520-da based cards?

A: Yes, these are standard SFP+ cables.

Q: 9. IF THIS IS COPPER, WHAT IS THE BENEFIT OF USING IT OVER THE RJ-45 CONNECTION WITH CAT6A OR CAT7? Thanks!

A: Fiber channels will have a faster transfer rate than Cat6 or Cat7 connections. Cat7 will have a transfer speed of 10 Gb/s but 99% of the computers do not have that anyway. Additionally, Fiber will be used to transfer data from one network switch to another. Cat5 or Cat6 only have transfer speeds up to 1Gb/s.

Q: 10. Is this backward compatible with pcie 3 x4 ?

A: This unit is backwards compatible with PCIe 3.0 and 2.0 however you will loose speed with older versions.