# Network Cable BlueOptics 721064-B21-BL QSFP 4xSFP+ InfiniBand 3m Black

**URL:** https://aio.lv/en/product--blueoptics-721064-b21-bl--11024793
**Data updated:** 2026-03-30 19:41 (EEST)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** 721064-B21-BL
**EAN:** 4063232009674
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 124.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 102.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-721064-b21-bl--11024793

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics 721064-B21-BL is a high-quality 3-meter InfiniBand/fibre optic cable featuring a QSFP connector and four SFP+ connectors. This cable is designed for high-speed data transmission, ensuring reliable performance in data centers and networking environments. With male/male connectors, it provides easy connectivity and flexibility for various setups. The durable black design ensures longevity and resistance to wear, making it an ideal choice for professional use.

## Long description

The BlueOptics 721064-B21-BL QSFP 4xSFP+ InfiniBand 3m is a 3-metre direct attach cable designed for short-range, high-speed connections in racks and between adjacent racks. It features a QSFP (Quad Small Form-factor Pluggable) male connector on one end and four SFP+ (Small Form-factor Pluggable Plus) male connectors on the other, supporting aggregated 40 Gbps links or four independent 10 Gbps channels. The cable uses passive twinax copper construction (30 AWG) suitable for electrical signal transmission over short distances and is offered in a durable black jacket for professional networking environments.
Advantages
This BlueOptics/BlueLAN compatible DAC offers a low-latency, low-power connection for high-density network setups. Being MSA-compliant and manufactured from components from established vendors, the cable provides predictable interoperability with major switch, router and storage platforms that support the original form factor and signalling standards. Its passive design reduces failure points and power consumption, while the compact QSFP-to-4xSFP+ form factor allows flexible deployment where a 40G port needs to be split into multiple 10G ports.
Suitable for
Connecting 40G QSFP ports to four 10G SFP+ ports in data center racks
Short-range links between adjacent racks or within the same rack
Aggregated 40G Ethernet, FCoE, Fibre Channel or InfiniBand connections up to 3 m
High-density switch, router and storage interconnects requiring low latency
Key specifications
Cable length: 3 m
Connector configuration: QSFP (male) to 4 × SFP+ (male)
Transmission type: passive twinax copper (DAC), 30 AWG
Supported data rates: up to 40 Gbps aggregate (4 × 10 Gbps channels)
Typical applications: Ethernet, FCoE, Fibre Channel, InfiniBand
Product colour: Black
Weight: approx. 0.25 kg
How to use
Verify that both ends of the connected devices support passive QSFP-to-4xSFP+ direct attach cabling and the intended protocols (Ethernet, FCoE, Fibre Channel or InfiniBand). Insert the QSFP connector into the 40G QSFP port and plug the SFP+ connectors into the respective 10G SFP+ ports, ensuring proper seating and latch engagement. Route the cable to avoid sharp bends and excessive tension; observe normal ESD precautions when handling connectors. No external power or transceivers are required for passive operation—link activation and negotiation are handled by the connected hardware.
Usage recommendations
For reliable performance, use this DAC within the specified 3 m distance and in environments where the host hardware explicitly supports passive DAC twinax solutions. Avoid repeated flexing near the connector boot and maintain a clear airflow path in rack installations. If interoperability is critical, request a test sample or verify compatibility with your hardware vendor documentation before large deployments.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate | 40 Gbit/s |
| InfiniBand protocol | Yes |

### Features

| Feature | Value |
|---|---|
| Cable length | 3 m |
| Connector 1 | QSFP |
| Connector 2 | 4xSFP+ |
| Product colour | Black |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.25 kg |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 260 g |

## FAQ

### How much does the Network Cable BlueOptics 721064-B21-BL cost, and is it available for purchase?

The price is 124.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 27.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### 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/11024793/64099062_large.webp