# SFP transceiver module Extralink EX.35931 1.25Gbps, multimode 850nm, LC/UPC, 550m, DOM, 2-pack

**URL:** https://aio.lv/en/product--extralink-ex35931--11656720
**Data updated:** 2025-12-04 02:33 (EET)
**Category:** Other goods
**Manufacturer:** Extralink
**Manufacturer code:** EX.35931
**EAN:** 5905090335931
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.99 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 14.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--extralink-ex35931--11656720

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

Two-pack Extralink EX.35931 SFP optical transceivers for 1.25Gbps links. Multimode 850nm modules with LC/UPC connector, up to 550 m reach and DOM support. Designed as dedicated replacements for HP/Aruba equipment, suitable for short-range Ethernet and fibre connections in data centers, office networks or campus links.

## Long description

SFP-BIDI modules provide a compact transceiver solution supporting dual data rates of 1.25 Gb/s and 1.0625 Gb/s for single-mode fiber links up to 20 km. Each module integrates an FP laser transmitter, a PIN photodiode with a transimpedance amplifier (TIA), and a microcontroller-based control unit. The modules comply with Class I laser safety standards and are designed for use in high-performance networking equipment where bidirectional fiber communication is required.
Advantages
These SFP-BIDI modules combine support for two common data rates with single-mode fiber transmission to 20 km, offering a cost-effective option for network upgrades or expansions. The integrated design reduces component count by including an FP laser, TIA-coupled photodiode and MCU in a single transceiver, while Class I laser compliance ensures adherence to safety regulations.
Key specifications
Data rates: 1.25 Gb/s and 1.0625 Gb/s (dual-rate)
Maximum reach: up to 20 km over single-mode fiber (SMF)
Transmitter: FP laser
Receiver: PIN photodiode with TIA
Control: integrated MCU
Safety: Class I laser compliant
How to use
Insert the SFP-BIDI module into a compatible SFP port on network equipment following the vendor's hot-swap guidelines. Connect single-mode fiber with the appropriate LC connectors, observing correct fiber polarity for bidirectional operation. Configure the device on the host system to operate at the required data rate (1.25 Gb/s or 1.0625 Gb/s) and verify link status and optical power levels through the management interface.
Recommendations
Use single-mode fiber rated for the target distance and verify transceiver compatibility with your switch or router model. Check optical power budget and monitor link diagnostics regularly to maintain reliable operation. Replace modules that show degraded optical performance or fail safety checks.

## FAQ

### How much does the Extralink SFP EX.35931 1.25Gbps multimode 850nm cost, and is it available for purchase?

The price is 17.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 03.08.2026 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, Bank cards on-line, Apple Pay, Google Pay. 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 Extralink 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 Extralink 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/11656720/66937927_large.webp