# Network Cable BlueOptics DAC-Q28-4S28-25G-2M-BL QSFP28 4xSFP28 InfiniBand 2m Black

**URL:** https://aio.lv/en/product--blueoptics-dac-q28-4s28-25g-2m-bl--10894276
**Data updated:** 2026-03-07 18:09 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DAC-Q28-4S28-25G-2M-BL
**EAN:** 4063232290010
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 173.49 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 143.38 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-dac-q28-4s28-25g-2m-bl--10894276

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.08.2026 | free |
| Pickup points | 12.08.2026 | 1.89 EUR |
| Courier delivery to door | 12.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics DAC-Q28-4S28-25G-2M-BL is a high-performance InfiniBand/fibre optic cable designed for data centers. With a length of 2 meters, it features a QSFP28 connector on one end and four SFP28 connectors on the other, allowing for efficient data transmission. The male/male configuration ensures compatibility with various devices, making it ideal for high-speed networking applications. Its robust design and black color provide durability and a professional appearance.

## Long description

The BlueOptics DAC-Q28-4S28-25G-2M-BL QSFP28 4xSFP28 InfiniBand 2m Black is a direct-attach copper (DAC) cable designed for short-reach, high-speed interconnects in data centre environments. This 2-metre, male-to-male assembly terminates in a QSFP28 connector on one end and four SFP28 connectors on the other, enabling aggregation or breakout of a single QSFP28 port into four independent 25G SFP28 links. The cable is supplied in a black jacket and built to support reliable, low-latency connections between switches, routers, host adapters and storage systems where InfiniBand or 25 Gigabit Ethernet links are required.
Advantages
This DAC offers a compact, cost-effective way to deploy multi-lane 25G links without the need for optical transceivers. The fixed 2 m length minimises signal loss for short-reach interconnects and simplifies cabling within racks and between adjacent equipment. The QSFP28-to-4xSFP28 breakout design provides flexible port consolidation and easy migration paths from higher-density QSFP ports to multiple SFP28 endpoints. The black outer jacket and robust construction contribute to durable handling in rack environments.
Suitable for
 Server-to-switch or switch-to-switch connections within the same rack or adjacent racks
 InfiniBand fabrics and 25 Gigabit Ethernet breakout applications
 High-density top-of-rack deployments requiring port aggregation or breakout
 Short-reach links in data centres, storage arrays and compute clusters
Key specifications
 Cable length: 2 m
 Connector configuration: QSFP28 (male) to 4 × SFP28 (male)
 Supported link types: InfiniBand and 25G Ethernet breakout
 Physical weight: 0.25 kg
 Product colour: Black
How to use
Ensure both devices support QSFP28-to-SFP28 breakout operation and are powered off or operating according to vendor hot-plug guidance before insertion. Align and insert the QSFP28 plug into the QSFP28 port and individually insert each SFP28 plug into the target SFP28 ports until latches engage. Verify link status on connected devices and configure port modes or link speeds in the switch or host adapter firmware as required for InfiniBand or 25G Ethernet operation. Avoid excessive bending near the connector ends and secure cables to prevent strain on the connectors.
Lietošanas ieteikumi
Install in short, rack-level connections to minimise attenuation; avoid running the DAC alongside high-power electrical cabling to reduce potential interference. For optimal reliability, follow equipment vendor compatibility lists and firmware requirements when using QSFP28 breakout functionality.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate | 100000 Gbit/s |
| InfiniBand protocol | Yes |

### Features

| Feature | Value |
|---|---|
| Cable length | 2 m |
| Connector 1 | QSFP28 |
| Connector 2 | 4xSFP28 |
| Product colour | Black |
| AWG wire size | 26 |
| Fastening type | Push–pull |
| Cable shape | Round |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |

### Weight & dimensions

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

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 70 |

### Packaging data

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

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | CE, Federal Communications Commission (FCC), RoHS |

## FAQ

### How much does the Network Cable BlueOptics DAC-Q28-4S28-25G-2M-BL cost, and is it available for purchase?

The price is 173.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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 07.08.2026 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.

### Where can I download the instructions for Network Cable BlueOptics DAC-Q28-4S28-25G-2M-BL?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/10894276/64098931_large.webp