# InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-1M-MT-BL 1m QSFP28 4xSFP28 Male/Male

**URL:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-1m-mt-bl--5041787
**Data updated:** 2026-02-25 16:38 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** Q28-4S28-DAC-1M-MT-BL
**EAN:** 4063232122373
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-q28-4s28-dac-1m-mt-bl--5041787

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

The BlueOptics Q28-4S28-DAC-1M-MT-BL is a 1 meter InfiniBand/fibre optic cable featuring a QSFP28 connector and four SFP28 connectors. It is designed for high-speed data transmission in data centers and networking applications, ensuring reliable connectivity and performance. The male-to-male configuration allows for easy integration with compatible devices.

## Long description

The BlueOptics Q28-4S28-DAC-1M-MT-BL is a 1 metre direct attach cable (DAC) with a QSFP28 plug on one end and four SFP28 plugs on the other, designed for short-reach high-speed links in racks and between adjacent racks. This passive twinax copper assembly supports 100GBase-CR4 or 4x25GBase-CR electrical signalling and is MSA-compliant, intended for use in data centre switches, routers and storage hardware that accept QSFP28 to 4xSFP28 DAC connections.
Advantages
The cable provides low latency and low power consumption typical of passive DAC solutions, enabling reliable 100 Gbit/s and 4x25 Gbit/s connections over a 1 m length. Built to MSA standards with 26 AWG conductors and rugged QSFP28/SFP28 connectors, it offers straightforward integration, minimal maintenance and an extended service life when used with compatible hardware. The passive design avoids additional active components, simplifying deployment and reducing total cost of ownership.
Suitable for
Short-reach links inside racks and between adjacent racks
100GBase-CR4 or 4x25GBase-CR electrical connections
Interconnects between switches, routers and storage systems
InfiniBand, Ethernet, FCoE and Fibre Channel transceivers supporting DAC
Key specifications
Length: 1 metre
Connector type: QSFP28 (male) to 4 × SFP28 (male)
Data rates supported: 100 Gbit/s (aggregate) or 4 × 25 Gbit/s
Cable type: passive twinax copper (DAC), 26 AWG conductors
Standards compliance: MSA-compliant QSFP28/SFP28 electrical pinout
Typical use: short-distance electrical interconnects in data centres
How to use
Ensure both devices support passive QSFP28-to-SFP28 DAC cables and are configured for the intended link speed (100G or 4×25G). Power down or follow hot-plug guidance from your hardware vendor when inserting connectors if required. Insert the QSFP28 end into the QSFP28 port and each SFP28 plug into the corresponding SFP28 ports, ensuring secure seating and correct orientation. Verify link status in network equipment management interfaces and monitor for correct lane mapping and negotiated speed.
Usage recommendations
Use this DAC for short-distance, high-throughput connections inside racks or between adjacent racks. Avoid routing the cable through sharp bends or high-interference environments and follow manufacturer guidelines for hot-plugging and port compatibility to ensure optimal performance.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.25 kg |
| Package weight | 260 g |
| Cable length | 1 m |
| Data transfer rate | 100 Gbit/s |
| Product colour | Black |
| Connector 1 | QSFP28 |
| Connector 2 | 4xSFP28 |
| InfiniBand protocol | Yes |

## FAQ

### How much does the InfiniBand/fibre optic cable BlueOptics Q28-4S28-DAC-1M-MT-BL cost, and is it available for purchase?

The price is 134.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 24 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 30.07.2026 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

## Image

https://aio.lv/img/cache/product/5041787/64353486_large.webp