Optic.ca NGQ4X25-CU5M-OC — 100G QSFP28 to 4×25G SFP28 breakout DAC cable
The Optic.ca NGQ4X25-CU5M-OC is a 5-metre passive copper twinax Direct Attach Cable (DAC) designed for high-density 25G/100G network deployments. It converts a single QSFP28 uplink port into four independent 25GBASE SFP28 lanes, making it the go-to solution for spine-to-leaf cabling in data centres and for connecting NETGEAR M4350 or M4500 series switches to 25G-capable servers, storage arrays, or top-of-rack devices. Certified and pre-validated by NETGEAR, this cable eliminates the compatibility risk that often plagues third-party optics, and comes backed by Optic.ca's lifetime warranty and Tier 1 component quality — all at a significant cost advantage over OEM alternatives.
NETGEAR-Certified Plug-and-Play Compatibility
This cable carries official NETGEAR certification, meaning it has been pre-validated on NETGEAR M4350 and M4500 series switches — the same switches most commonly deployed in campus and data-centre aggregation layers. In practice this means there is no risk of the switch refusing to enable the port, no need to override third-party optic lockouts, and no firmware-version dependency to track. For network administrators, it translates directly into faster commissioning and zero compatibility-related troubleshooting calls after deployment.
Passive Design: No Power, No Heat, No Latency
As a passive copper twinax cable, the NGQ4X25-CU5M-OC draws no power from the host switch port and generates no heat of its own. At 5 metres this is the practical maximum reach for passive DAC technology, so the cable is optimally suited for within-rack and adjacent-rack runs. The absence of active components also means propagation latency is as low as physically possible — relevant for latency-sensitive workloads such as financial trading platforms, HPC clusters, and storage-area networks where even microsecond differences matter.
In-House DDM for Real-Time Lane Monitoring
Digital Diagnostic Monitoring (DDM) is embedded directly in both connectors, allowing network management tools to read real-time signal data per lane — including receive power levels and operating status — without external test equipment. For operations teams managing large switch fabrics, this is the difference between proactive fault detection and reactive outage response. A degrading lane shows up on the dashboard before it fails, allowing a planned maintenance window rather than an emergency fix.
Lifetime Warranty and Tier 1 Component Quality
Optic.ca manufactures to Tier 1 MTBF standards and backs the transceiver side of every DAC with a lifetime warranty, plus a manufacturing defect warranty on the cable assembly. All units are pre-tested before shipment. For resellers this significantly lowers the total cost of ownership argument versus OEM pricing: customers get equivalent reliability, full warranty coverage, and a price point that makes 25G port density economically viable even in budget-constrained projects.
