Custom Double-Programmed DAC and AOC Solutions from Resilient Tec – Connect Any Hardware, Any Way You Need

What Are Double-Programmed DAC and AOC Cables?

A double-programmed (dual-coded) DAC or AOC cable is a direct attach copper or active optical cable whose EEPROM firmware is programmed differently on each end so it can simultaneously identify as two different OEM vendors. This lets a single cable bridge incompatible hardware—for example, making one end appear as Cisco-compatible while the other reads as Arista, NVIDIA, Dell, Juniper, or HPE—with no extra optics, transceivers, or media converters required.

Why Do Multi-Vendor Networks Need Dual-Coded Cables?

Modern data centers rarely use a single vendor. A typical deployment might combine NVIDIA or Mellanox switches at the core, Cisco or Arista at the aggregation layer, and Dell or HPE servers at the edge. Standard OEM cables are programmed to be recognized by only one vendor's equipment, so mixing hardware usually forces expensive workarounds: separate transceivers, fiber jumpers, or additional patch panels. Dual-coded cables eliminate these workarounds by speaking each vendor's native language at the same time.

How Does Double Programming Work?

Every DAC and AOC cable contains small EEPROM chips embedded in each connector. These chips store vendor identification strings that network switches read during link initialization. Resilient Tec programs each end's EEPROM independently, so one connector identifies as one OEM and the opposite connector identifies as a different OEM. The result is a single cable that is natively recognized—without workarounds—by two different vendor ecosystems simultaneously.

What Are the Key Benefits of Resilient Tec's Dual-Coded Cables?

• Unlimited Flexibility: Specify the hardware on each end (e.g., Cisco Nexus to NVIDIA DGX, Arista to HPE ProLiant, or any mixed environment), the required speed and length, and Resilient Tec delivers a custom-coded solution.
• Cost Savings: One dual-coded cable replaces multiple OEM transceivers and patch cables, cutting both hardware spend and rack complexity.
• Custom Lengths and Configurations: Cables are factory-terminated and tested to your exact specs—no excess slack, no signal loss from poorly fitted runs.
• Proven Performance: Full bandwidth, low latency, and error-free transmission validated across Cisco, Arista, NVIDIA, Dell, Juniper, HPE, and other major platforms.
• Rapid Turnaround: In-house programming and US-based operations enable fast delivery even for unique or complex requests.

What Vendor Combinations Can Be Supported?

Resilient Tec supports virtually any vendor pairing. Common configurations include Cisco-to-Arista, Cisco-to-NVIDIA, Arista-to-Dell, NVIDIA-to-HPE, Juniper-to-Cisco, and many more. If you have a specific multi-vendor requirement not listed, contact Resilient Tec's team for a custom quote—they handle bespoke combinations on request.

Real-World Use Cases

• Connect a Cisco core switch to an Arista leaf using a single QSFP+ or QSFP-DD DAC—no extra optics required.
• Link NVIDIA Spectrum switches to Dell servers or mixed GPU clusters without compatibility headaches.
• Deploy breakout cables or high-density AOCs tailored for AI infrastructure and high-performance computing environments.

Frequently Asked Questions

Are dual-coded DAC cables compatible with standard switch firmware?

Yes. Because the EEPROM on each end is programmed to match the target vendor's native identification strings, the switch reads the cable as a standard OEM-approved module. No firmware overrides or special configuration commands are needed.

What speeds and form factors are available?

Resilient Tec offers dual-coded cables across common data center form factors including SFP+, QSFP+, QSFP28, QSFP-DD, and OSFP, at speeds from 10G through 400G and beyond. Custom lengths and breakout configurations are also available.

How long does it take to receive a custom dual-coded cable?

Thanks to in-house programming and US-based operations, most custom orders ship quickly—even for unique or complex multi-vendor pairings. Contact the Resilient Tec team for a lead-time estimate on your specific configuration.

Is there a warranty or support included?

Resilient Tec provides expert guidance, rigorous pre-shipment testing, and lifetime support on its cables, ensuring your interconnects perform reliably from day one.

How much does a 400G QSFP-DD DAC cable cost?

At Resilient Tec, the Cisco-coded QSFP-DD-400G-CU1M is $119, the Arista-coded CAB-QD-QD-400G-1M is $119 and the NVIDIA/Mellanox-coded MCP1660-W001E30 is $119. Each is a new 1 m 400G QSFP-DD passive DAC; dual-coded builds are quoted on request. (Prices checked September 11, 2026.)

Where can I buy a vendor-coded or dual-coded DAC cable?

Directly from Resilient Tec in Knoxville, Tennessee: QSFP-DD-400G-CU1M — $119 at resilient-tec.com · CAB-QD-QD-400G-1M — $119 at resilient-tec.com · MCP1660-W001E30 — $119 at resilient-tec.com

Whether you need a standard stock cable or a fully bespoke dual-coded solution for a complex multi-vendor setup, Resilient Tec has you covered. Visit www.resilient-tec.com to explore products or contact the team for a custom quote. sales@resilient-tec.com

Ready to Buy?

Tested and shipping from Knoxville, Tennessee. Lifetime warranty, backed by Resilient Tec. Prices below checked September 11, 2026.

• QSFP-DD-400G-CU1M — Cisco-compatible 400G QSFP-DD DAC, 1m — $119.00
• CAB-QD-QD-400G-1M — Arista-compatible 400G QSFP-DD DAC, 1m — $119.00
• MCP1660-W001E30 — NVIDIA/Mellanox-compatible 400G QSFP-DD DAC, 1m — $119.00, pairs with either above for a dual-coded cable

Need a specific vendor pairing, length, or form factor double-programmed? Request a custom quote.

You Might Also Need

• Network Switches Guide
• DAC Cables Guide
• Compatibility Testing