# SFP module Extralink EX.35894 1.25Gbps LC/UPC 1310nm 2km single-mode DOM 2-pack

**URL:** https://aio.lv/en/product--extralink-ex35894--12236605
**Data updated:** 2026-03-29 16:23 (EEST)
**Category:** Network Transceiver Modules
**Manufacturer:** Extralink
**Manufacturer code:** EX.35894
**EAN:** 5905090335894
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Dual-pack Extralink SFP transceiver modules (model EX.35894) support 1.25Gbps data rate for single‑mode fiber links. Each module uses LC/UPC connector, operates at 1310nm wavelength with up to 2 km reach and provides DOM (Digital Optical Monitoring). Suited for optical uplinks, switches and routers in access and campus networks.

## Long description

Extralink EX.35894 SFP module is a hot-pluggable transceiver designed for 1.25Gbps single‑mode fiber links. Each module in this 2‑pack uses an LC/UPC connector and operates at a 1310 nm wavelength, supporting reliable optical transmission up to 2 km. The module supports Digital Optical Monitoring (DOM) for real‑time measurement of operational parameters including temperature, supply voltage, laser bias current, and transmitted/received optical power, making it suitable for uplinks, switches and routers in access and campus network environments.
Advantages
The Extralink EX.35894 provides a predictable 1.25Gbps data rate over single‑mode fiber with a 2 km reach and industry-standard LC/UPC interface, enabling straightforward integration with compatible network equipment. DOM capability offers remote visibility of key optical and electrical parameters, which simplifies diagnostics and helps maintain link performance. The small form-factor pluggable design ensures compatibility with a wide range of SFP ports and allows easy replacement or upgrade without disrupting existing installations.
Suitable for
Fiber uplinks between switches and routers in campus and office networks
Interbuilding connections up to 2 km on single‑mode fiber
Data center server-to-switch or switch-to-switch links requiring 1.25Gbps
ISP edge links and aggregation points where DOM monitoring is needed
Security and monitoring systems transmitting video or telemetry over fiber
Key specifications
Data rate: up to 1.25 Gb/s (1250 Mb/s)
Fiber type: single‑mode
Wavelength: 1310 nm
Maximum reach: up to 2 km
Connector: LC/UPC
Monitoring: Digital Optical Monitoring (DOM) for temperature, Vcc, laser bias current, Tx/Rx power
Form factor: SFP (Small Form‑factor Pluggable)
How to use
Install the Extralink SFP module into an available SFP port on a compatible switch, router, or transceiver chassis while the host device is powered according to the vendor’s instructions. Connect single‑mode fiber using an LC/UPC patch cable, ensuring proper endface cleanliness and correct polarity. After insertion, verify link status on the host device and configure any required interface parameters. Use management interfaces or network management systems to access DOM data for ongoing monitoring and troubleshooting.
Usage recommendations
For reliable operation, use single‑mode fiber certified for 1310 nm and maintain clean connectors to minimize loss. Monitor DOM values regularly to detect early signs of degradation (such as falling Tx power or rising temperature) and keep firmware on network devices up to date for best compatibility.

## FAQ

### 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 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

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