# CBO InfiniBand Cable CAB-Q28-S28-3M-BL QSFP28 to 4×SFP28, length 3 m, blue

**URL:** https://aio.lv/en/product--blueoptics-cab-q28-s28-3m-bl--4470527
**Data updated:** 2026-02-25 16:34 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** CAB-Q28-S28-3M-BL
**EAN:** 4063232641805
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 192.99 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 159.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-cab-q28-s28-3m-bl--4470527

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.08.2026 | free |
| Pickup points | 11.08.2026 | 1.89 EUR |
| Courier delivery to door | 11.08.2026 | 4.99 EUR |

## Summary description

Passive InfiniBand breakout cable by CBO, model CAB-Q28-S28-3M-BL. Connects a QSFP28 port to four SFP28 ports over a 3 m blue cable. Designed for high-speed data links in servers, switches and storage systems that require QSFP28-to-SFP28 split connectivity. Provides straightforward cabling for port consolidation, testing and short-reach interconnects.

## Long description

The CBO InfiniBand Cable CAB-Q28-S28-3M-BL is a passive QSFP28-to-4×SFP28 breakout cable with a 3 meter blue jacket designed for short-reach, high-bandwidth connections. It converts a single QSFP28 port into four independent SFP28 links, enabling direct interconnection between servers, switches and storage devices that support QSFP28 and SFP28 interfaces. The cable is intended for environments where compact, reliable copper cabling is needed for port consolidation, test setups and short-distance interconnects.
Advantages
This passive breakout cable offers straightforward installation with no external power or active components required, reducing complexity in rack deployments. The 3 m length provides flexibility within racks and between adjacent equipment; the blue jacket aids visual identification in cable runs. Because it uses standardized QSFP28 and SFP28 connectors, it supports native electrical pinouts for direct port mapping and simplifies migration strategies from 25/100GbE and InfiniBand QSFP-based links to multiple SFP28 endpoints.
Suitable for
 Aggregating a QSFP28 port into up to four SFP28 connections in data centers
 Short-reach server-to-switch or switch-to-switch links within racks
 Laboratory and test environments for validation of SFP28 interfaces
 Port consolidation and patching where multiple 25Gb links are required
Key specifications
 Connector configuration: 1×QSFP28 to 4×SFP28
 Cable type: passive copper breakout
 Length: 3 meters (approx. 9.8 ft)
 Jacket color: blue
 Supported data rates: compatible with 25Gbps per SFP28 lane and aggregated QSFP28 bandwidth
 Form factor: QSFP28 plug and four SFP28 plugs for direct port mapping
How to use
Ensure both the QSFP28 host port and the target SFP28 ports support passive breakout connections and compatible electrical pinouts. With equipment powered off or in maintenance mode, insert the QSFP28 end into the QSFP28 port and connect each SFP28 plug to the desired SFP28 ports on the remote device. Power the equipment and verify link status and negotiated speeds in the host and remote interfaces. For migration scenarios, map VLANs or port configurations as needed so each SFP28 link functions as an independent 25Gb/s channel.
Usage recommendations
Use this cable for short-reach, in-rack interconnects and testing. Avoid running the cable over long distances; passive copper breakout cables are intended for short links and may not meet signal integrity requirements for extended runs. Keep bends gentle and maintain bend radius recommendations from equipment vendors to preserve connector reliability and signal performance.

## FAQ

### How much does the CBO QSFP28 to 4×SFP28 Cable CAB-Q28-S28-3M-BL cost, and is it available for purchase?

The price is 192.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 29 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 06.08.2026 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

## Image

https://aio.lv/img/cache/product/4470527/59859260_large.webp