# SFP Module Extralink SFP WDM 1.25G 1310/1550nm Single mode 20km LC DDM Pair

**URL:** https://aio.lv/en/product--extralink-ex6204--701692
**Data updated:** 2025-12-07 20:18 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** Extralink
**Manufacturer code:** EX.6204
**EAN:** 5902560366204
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.99 €
**Prices and availability valid until:** 2026-10-28 23:59
**Price without VAT (21%):** 14.04 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--extralink-ex6204--701692

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.10.2026 | free |
| Pickup points | 15.10.2026 | 1.99 EUR |
| Courier delivery to door | 15.10.2026 | 4.99 EUR |

## Summary description

The Extralink SFP Module SFP WDM 1.25G 1310/1550nm is a single mode transceiver designed for long-distance data transmission up to 20km. It supports a maximum data transfer rate of 1250 Mbit/s and features an LC connector with DDM for monitoring. This pair of modules is FCC certified, ensuring reliable performance and compatibility in various networking applications.

## Long description

Extralink SFP 1.25G BIDI 1310/1550NM 20KM LC DDM is a single-mode fiber optical transceiver module designed for data rates of 1.25 Gbps (1.0625 Gbps) and point-to-point transmission distances up to 20 km over single-mode fiber (SMF). The module uses bidirectional operation with Tx at 1310 nm and Rx at 1550 nm and complies with Class 1 laser safety requirements.
Advantages
The Extralink SFP 1.25G BIDI offers a compact SFP form factor, low power consumption and cost-effective deployment for long-reach single-mode links. Integrated components include an FP laser transmitter, a PIN photodiode with transimpedance amplifier (TIA) and an MCU control unit, while DDM support provides diagnostic monitoring for link management.
Key specifications
Data rate: 1.25 Gbps (1.0625 Gbps)
Wavelength: Tx = 1310 nm, Rx = 1550 nm
Reach: up to 20 km over single-mode fiber (SMF)
Connector: LC
Form factor: SFP (small form-factor pluggable)
Monitoring: DDM (Digital Diagnostic Monitoring) support
Transmit type: FP laser
Receiver: PIN photodiode with TIA
Safety: Class 1 laser
How to use
Insert the Extralink SFP 1.25G BIDI module into a compatible SFP port on a switch, router or media converter. Ensure the LC single-mode patch cords are connected correctly: the fiber carrying the 1310 nm transmit signal from the local module must be connected to the remote module's receive port for bidirectional operation. Check that the host device supports 1.25 Gbps and SFP modules; enable any required port settings and verify link and DDM status in the device interface.
Recommendations
Use ITU-T compliant SMF and high-quality LC connectors to achieve the specified 20 km reach. Verify compatibility with your network equipment vendor list before deployment and avoid bending or stressing the fiber to maintain link performance and module longevity.

## Specifications

### Packaging data

| Feature | Value |
|---|---|
| Number of products included | 2 pc(s) |

### Sustainability

| Feature | Value |
|---|---|
| Sustainability certificates | CE, RoHS |

### Certificates

| Feature | Value |
|---|---|
| Certification | FCC |

### Performance

| Feature | Value |
|---|---|
| Rx wavelength (min) | 1550 nm |
| Tx wavelength (min) | 1310 nm |
| Maximum transfer distance | 20000 m |
| Fiber optic connector | LC |
| Single-mode fiber (SMF) supported | Yes |
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| SFP transceiver type | Fiber optic |

## FAQ

### How much does the SFP Module Extralink SFP WDM 1.25G 1310/1550nm cost, and is it available for purchase?

The price is 16.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 34 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 12.10.2026 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: interface type, maximum data transfer rate, sfp transceiver type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/701692/54588750_large.webp