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

**URL:** https://aio.lv/en/product--blueoptics-dac-q28-s28-2m-bl--10894197
**Data updated:** 2026-03-07 18:09 (EET)
**Category:** Network Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** DAC-Q28-S28-2M-BL
**EAN:** 4063232642109
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 173.49 €
**Prices and availability valid until:** 2026-07-27 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-s28-2m-bl--10894197

## 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 DAC-Q28-S28-2M-BL is a high-performance InfiniBand/fibre optic cable designed for data centers. It features a QSFP28 connector on one end and 4xSFP28 connectors on the other, allowing for efficient data transmission. With a length of 2 meters, this cable is ideal for connecting devices in close proximity. The male/male connector design ensures a secure connection, while the black color provides a sleek look. Perfect for high-speed networking applications.

## Long description

The BlueOptics DAC-Q28-S28-2M-BL is a 2 m direct-attach cable (DAC) designed for short-reach high-speed interconnects in data centres and rack environments. One end features a QSFP28 connector and the other end breaks out to four SFP28 connectors, enabling 100GBase-CR4 to 4x25GBASE-CR connectivity over twinax copper. The cable is a passive, MSA-compliant twinax assembly with 26 AWG conductors and a black outer jacket. It is intended for use where electrical short-distance links are preferred over active optical transceivers and supports Ethernet, FCoE, Fibre Channel and InfiniBand protocols when used with compatible hardware.
Advantages
The cable provides a cost-effective, low-latency connection for short distances with low power consumption due to its passive twinax design. MSA compliance and the QSFP28 to 4xSFP28 breakout enable flexible deployment between 100G ports and multiple 25G ports without additional transceivers. Built with industry-grade components and 26 AWG conductors, the assembly is suitable for dense rack installations and is designed for consistent performance and long operational life when used within the intended distance and supported platforms.
Suitable for
Connecting QSFP28 100G ports to four 25G SFP28 ports within the same rack or adjacent racks
High-density switch-to-switch and switch-to-server connections in data centres
Short-reach InfiniBand, Ethernet, FCoE or Fibre Channel links up to 2 m
Environments where low latency and low power consumption are required
Key specifications
Cable length: 2 m
Connector configuration: QSFP28 to 4 × SFP28
Cable type: Passive twinax copper (DAC)
Conductor gauge: 26 AWG
Supported data rates/protocols: 100GBase-CR4 / 4×25GBASE-CR, compatible with Ethernet, FCoE, Fibre Channel and InfiniBand over short distances
Product colour: Black
Typical use: Rack and adjacent rack interconnects
How to use
Ensure that both devices explicitly support passive QSFP28 to 4×SFP28 direct-attach twinax cables and that firmware/driver requirements for passive DACs are met. Power down or place interfaces in a safe state if recommended by your equipment vendor, insert the QSFP28 connector into the 100G port and then connect the four SFP28 connectors to the corresponding 25G ports. Verify link status on each port and confirm negotiated speeds and protocols through your switch or host management interface. Avoid sharp bends and excessive strain on the cable and secure routing within rack channels or cable management panels.
Usage recommendations
Use this passive DAC for short, high‑bandwidth links inside racks or between adjacent racks. For longer distances or where optical isolation is required, select active optical cables or transceiver plus fibre solutions. Regularly inspect connector contacts and cable routing to maintain signal integrity and expected lifetime.

## Specifications

| Feature | Value |
|---|---|
| Data transfer rate | 100 Gbit/s |
| InfiniBand protocol | Yes |

### Features

| Feature | Value |
|---|---|
| Cable length | 2 m |
| Connector 1 | QSFP28 |
| Connector 2 | 4xSFP28 |
| Product colour | Black |

### Weight & dimensions

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

### Packaging data

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

### Logistics data

| Feature | Value |
|---|---|
| Warranty period | 5 year(s) |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

## FAQ

### How much does the Network Cable BlueOptics DAC-Q28-S28-2M-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 — 56 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/10894197/64098895_large.webp