# QSFP Direct Attach Cable BlueOptics LSWM1QSTK0 40GBASE-CR4, 1 m, passive

**URL:** https://aio.lv/en/product--blueoptics-lswm1qstk0-bl--5039756
**Data updated:** 2026-03-07 15:12 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** LSWM1QSTK0-BL
**EAN:** 4063232636658
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 71.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 59.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-lswm1qstk0-bl--5039756

## 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

BlueOptics QSFP Direct Attach Cable LSWM1QSTK0 is a 1 meter, passive copper DAC designed for 40GBASE-CR4 connectivity. It provides a QSFP form-factor direct attach link between switches, servers or routers supporting 40 Gbps four-lane Ethernet. Suitable for short-reach interconnects in data centers and network racks where low-latency, cost-efficient 40 Gb/s links are required.

## Long description

BlueOptics QSFP Direct Attach Cable LSWM1QSTK0 40GBASE-CR4 is a 1 m passive copper DAC designed for 40 Gbps four-lane Ethernet connections. The cable uses a QSFP form-factor to provide a direct attach link between switches, servers or routers supporting 40GBASE-CR4, enabling short-reach, low-latency interconnects in data center racks and network closets. It is intended for environments that require cost-efficient and power-conscious 40 Gb/s point-to-point links without the need for additional optical transceivers.
Advantages
The passive copper design delivers low latency and low power consumption compared with active modules, while maintaining full four-lane 40 Gbps bandwidth. The QSFP form-factor ensures compatibility with QSFP ports commonly found on networking equipment, allowing plug-and-play installation without complex configuration. At 1 meter length the cable is suited for short interconnects inside racks or between adjacent racks, offering a reliable and cost-effective alternative to optical links for short distances.
Suitable for
 Short-reach interconnects between switches within a rack
 Direct connections from servers to top-of-rack switches
 High-density aggregation links in data center environments
 Low-latency links for clustering or storage networks
Key specifications
 Interface: QSFP (quad small form-factor pluggable) direct attach cable
 Data rate: 40 Gbps (4 lanes, 10 Gbps per lane)
 Standard: 40GBASE-CR4
 Length: 1 meter
 Cable type: Passive copper DAC
 Typical use case: Short-reach, within-rack or adjacent-rack connections
How to use
Insert each QSFP connector into the corresponding QSFP port on the two devices to be connected, ensuring proper orientation and a secure seating. No special configuration or external power is required for passive operation; the devices will negotiate link parameters according to the 40GBASE-CR4 standard. Verify link status on both devices after insertion and route the cable to avoid sharp bends or excessive tension.
Usage recommendations
For reliable performance, use the cable for distances up to its specified length in within-rack or adjacent-rack deployments. Avoid tight cable bends (respect the minimum bend radius), keep the cable away from sources of electromagnetic interference, and confirm QSFP port compatibility and firmware support on network equipment prior to installation.

## FAQ

### How much does the BlueOptics QSFP Direct Attach Cable LSWM1QSTK0 cost, and is it available for purchase?

The price is 71.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 145 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