# BlueOptics QSFP-DD to 2xQSFP56 fibre/InfiniBand cable 1 m, male/male, black

**URL:** https://aio.lv/en/product--blueoptics-cab-d-2q-400g-1m-bl--12243267
**Data updated:** 2026-04-01 09:51 (EEST)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** CAB-D-2Q-400G-1M-BL
**EAN:** 4063232054179
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

BlueOptics CAB-D-2Q-400G-1M-BL is a 1 m high-speed fibre optic/InfiniBand cable with a QSFP-DD plug on one end and two QSFP56 plugs on the other (male to male). Designed for 400G interconnects and equipment breakout, it supports short-reach connections between QSFP-DD and dual QSFP56 ports in data center and server environments.

## Long description

BlueOptics QSFP-DD to 2xQSFP56 fibre/InfiniBand cable 1 m, male/male, black (CAB-D-2Q-400G-1M-BL) is a 1 metre high-speed interconnect cable engineered for direct connections and breakout links in data centre and server environments. The cable features a single QSFP-DD plug on one end and two QSFP56 plugs on the other, enabling a 400 Gbit/s aggregate data path and compatibility between QSFP-DD ports and dual QSFP56 interfaces. Its compact, black jacket and male-to-male connectors are intended for short-reach applications where reliable, low-latency links are required.
Advantages
The cable provides a straightforward physical breakout from a QSFP-DD port to two QSFP56 ports without additional transceivers, reducing component count and installation complexity. Supporting 400 Gbit/s aggregate throughput, it is suitable for high-bandwidth links inside racks or between adjacent equipment. The 1 m length minimises excess slack and helps maintain tidy cable management in dense rack deployments, while the black outer jacket offers a standard professional appearance and basic abrasion resistance.
Suitable for
Short-reach interconnects between QSFP-DD and dual QSFP56 ports in data centres
Equipment breakout from a 400G QSFP-DD transceiver to two 200G QSFP56 links
Rack-to-rack or server-to-switch connections within the same cabinet or adjacent cabinets
InfiniBand high-performance computing interconnects requiring QSFP-DD to QSFP56 breakout
Key specifications
Cable length: 1 m
Connector A: QSFP-DD male
Connector B: 2 × QSFP56 male
Aggregate data rate: 400 Gbit/s
Colour: Black
Weight: 0.35 kg
How to use
Ensure compatible QSFP-DD and QSFP56 ports are present and that firmware or driver requirements for breakout operation are met on connected devices. Power down or follow hot-plug procedures recommended by your equipment vendor before inserting the cable. Insert the QSFP-DD plug into the 400G port and connect the two QSFP56 plugs to the target ports, verifying secure latch engagement. After connection, check link status LEDs or management interfaces to confirm the expected 400G-to-2×200G breakout operation.
Usage recommendations
Use this 1 m QSFP-DD to 2×QSFP56 cable for short-reach, in-rack or adjacent-cabinet connections. Avoid tight bends and excessive tensile force on the cable; maintain the manufacturer’s minimum bend radius and route the cable to prevent interference with airflow and other equipment. Verify device compatibility for QSFP-DD breakout and follow data centre best practices for cable management and port mapping.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate | 400 Gbit/s |
| InfiniBand protocol | Yes |

### Features

| Feature | Value |
|---|---|
| Cable length | 1 m |
| Connector 1 | QSFP-DD |
| Connector 2 | 2xQSFP56 |
| Product colour | Black |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.35 kg |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 360 g |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All BlueOptics products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized BlueOptics service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: cable length, connector 1, connector 2, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/12243267/68142334_large.webp