Optic.ca NGQ4X25-CU2M-OC — 100G QSFP28 to 4x25G SFP28 passive breakout DAC cable
The Optic.ca NGQ4X25-CU2M-OC is a 2-meter passive copper twinax (TwinAx) direct attach cable (DAC) designed to break out a single 100G QSFP28 port into four independent 25G SFP28 connections. Purpose-built for 100% compatibility with NETGEAR switches, it is ideal for high-density data centre and enterprise network environments where short-reach, cost-efficient 25G connectivity is needed between top-of-rack switches and servers. Coded in-house by Optic.ca for guaranteed interoperability, it is a plug-and-play, zero-configuration solution that eliminates the need for optical transceivers and separate patch cables — reducing both cost and complexity.
NETGEAR-Certified Interoperability
This cable is 100% certified for NETGEAR switches — meaning it is validated and recognised by NETGEAR equipment firmware as a genuine compatible module. In practice, this eliminates the risk of 'unsupported transceiver' errors that can block a port or trigger alerts on managed switches. For data centres deploying NETGEAR M4350 or M4500-series switches, it means the cable can be installed and forgotten — no CLI overrides, no firmware exceptions, and no support headaches down the line.
In-House Coding for Flawless Compatibility
Every Optic.ca DAC cable is coded in-house rather than relying on generic third-party firmware. This means the cable's EEPROM identifies correctly to the target switch, replicating the behaviour of the OEM module. The practical result for the end user is that the link comes up immediately upon insertion, the switch management interface reports correct cable type and length, and DDM readings are accurate — all without any manual intervention. This level of coding control also enables Optic.ca to deliver specialised configurations for non-standard setups if needed.
Passive Design: No Power, No Heat, No Latency
As a passive copper twinax cable, the NGQ4X25-CU2M-OC draws no power from the switch port and adds no electrical processing latency to the signal path. For latency-sensitive applications such as financial trading, HPC clusters, or storage area networks, this is a meaningful advantage over active optical solutions. The passive design also means there are no active components to fail, contributing to the extremely high MTBF that meets or exceeds Tier 1 OEM standards — translating directly into higher uptime and fewer unplanned maintenance interventions.
DDM for Real-Time Link Diagnostics
Digital Diagnostic Monitoring (DDM) support allows network management systems to poll live operational parameters — including temperature, voltage, and signal integrity — directly from the cable's transceiver heads. This gives operations teams early warning of marginal link conditions before they cause a service outage. For managed environments where SLA compliance is critical, DDM turns a passive copper cable into an active diagnostic point in the network monitoring stack, without any additional hardware.
Lifetime Warranty and Tier 1 Component Quality
Optic.ca backs the transceiver portion of every DAC cable with a lifetime warranty, and the cable assembly with a manufacturing defect warranty. All units are pre-tested before shipment and built from Tier 1 components to meet mission-critical reliability demands. For an IT team managing switch infrastructure over a multi-year lifecycle, this warranty policy removes the usual cost and risk trade-off associated with third-party optics — delivering OEM-equivalent peace of mind at a significantly lower price point.
