# Fiber Optic Transceiver CBO S-31DLC20D 1.25 Gbps Singlemode 20 km 1310 nm

**URL:** https://aio.lv/en/product--blueoptics-s-31dlc20d-bo--4467191
**Data updated:** 2026-02-25 16:32 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** BlueOptics
**Manufacturer code:** S-31DLC20D-BO
**EAN:** 4063232629681
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 29.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-s-31dlc20d-bo--4467191

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

CBO S-31DLC20D is a fiber optic SFP transceiver compatible with MikroTik systems, providing 1.25 Gbps data rate over singlemode fiber for distances up to 20 km. It operates at 1310 nm wavelength and fits standard SFP slots. Designed for network uplinks and long-distance connections, it enables reliable fiber links between switches, routers, and telecom equipment.

## Long description

CBO S-31DLC20D 1.25 Gbps Singlemode 20 km 1310 nm is a fiber optic SFP transceiver designed for use in standard SFP slots. Compatible with MikroTik systems and other devices that accept standard SFP modules, this module provides a 1.25 Gbps data rate over singlemode fiber links up to 20 km. It transmits at a 1310 nm wavelength and is intended for network uplinks, long-distance connections, and interconnection of switches, routers and telecom equipment.
Advantages
The transceiver supports a 1.25 Gbps transfer rate and singlemode fiber operation, enabling stable long-distance links without intermediate signal conversion. Its 1310 nm operating wavelength is suitable for metro and enterprise backbone connections. Designed to fit in standard SFP ports, the module simplifies upgrades and replacements in existing network hardware. The compact SFP form factor and vendor compatibility reduce the need for custom cabling or adapters.
Suitable for
Switch-to-switch uplinks across campus or metro networks
Router-to-switch connections for branch or headquarters links
Telecom and ISP access links over singlemode fiber
Point-to-point fiber links requiring up to 20 km reach
Key specifications
Form factor: SFP (Small Form-factor Pluggable)
Data rate: 1.25 Gbps (gigabit Ethernet/SDH/SONET compatible)
Fiber type: Singlemode
Maximum range: up to 20 km over singlemode fiber
Wavelength: 1310 nm
Connector type: LC duplex (industry standard)
Hot-pluggable SFP design for easy installation and replacement
How to use
Insert the SFP transceiver into an available SFP port on a compatible switch, router or transceiver cage until it clicks into place. Connect singlemode LC duplex fiber patch cords to the transceiver ports, ensuring correct Tx/Rx orientation. Verify link status via device indicators or management interfaces and configure interface settings on the host device as required (speed, duplex, and optical diagnostics if supported). For fiber runs approaching the specified maximum distance, confirm optical power budget and link quality using appropriate test equipment.
Usage recommendations
Use singlemode LC duplex fiber with appropriate cleaning procedures to avoid contamination of optical interfaces. Prioritize correct polarity, check link LEDs after insertion, and monitor device logs for any optical alarms. For guaranteed performance, follow network device compatibility notes and optical power budget calculations when planning links near the 20 km limit.

## FAQ

### How much does the CBO S-31DLC20D Fiber Optic Transceiver 1.25 Gbps cost, and is it available for purchase?

The price is 35.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2033 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 23.07.2026 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/4467191/66006277_large.webp