# SFP fiber optic transceiver TP-Link ISM311LS 1250 Mbit/s 1310 nm, 3.3 V, grey

**URL:** https://aio.lv/en/product--tp-link-ism311ls--11545911
**Data updated:** 2026-02-10 16:13 (EET)
**Category:** Network Switches
**Manufacturer:** TP-LINK
**Manufacturer code:** ISM311LS
**EAN:** 1210002601955
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 16.52 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tp-link-ism311ls--11545911

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

TP-Link ISM311LS is an SFP fiber optic transceiver supporting up to 1250 Mbit/s data rate at 1310 nm wavelength. Designed for SFP interfaces and IEEE 802.3z networking standards, it operates from a 3.3 V input and comes in grey. Compact dimensions (56.4 × 13.4 × 11 mm) make it suitable for switches and network devices requiring hot-pluggable fiber uplinks.

## Long description

TP-Link ISM311LS is a single‑mode SFP fiber optic transceiver designed to provide hot‑pluggable fiber uplinks for switches and network devices. It supports data rates up to 1250 Mbit/s at a wavelength of 1310 nm, operates from a 3.3 V input and is built to meet industrial operating temperature requirements. The compact module is compatible with standard SFP interfaces and IEEE 802.3z networking.
Advantages
The transceiver is hot‑pluggable for flexible installation and replacement, supports Digital Diagnostic Monitoring (DDM) for real‑time module status, and complies with the SFP Multi‑Source Agreement for broad compatibility. Its single‑mode design and industrial temperature rating enable extended reach and reliable operation in harsh environments.
Suitable for
Extending fiber links up to 20 km for industrial and enterprise networks
Adding hot‑swappable SFP uplinks to managed and unmanaged switches
Use in environments requiring wide operating temperature range
Key specifications
Form factor: SFP (Small Form‑Pluggable)
Fiber type: single‑mode
Connector: LC
Data rate: up to 1250 Mbit/s (1.25 Gbit/s)
Wavelength: 1310 nm
Operating voltage: 3.3 V
Operating temperature range: -40 to 85°C
Supports Digital Diagnostic Monitoring (DDM)
Networking standard compatibility: IEEE 802.3z
Typical reach: up to 20 km
Color: grey
Dimensions (approx.): 56.4 × 13.4 × 11 mm
How to use
Insert the ISM311LS module into a compatible SFP port on a switch or network device while the device is powered according to the host equipment instructions. Connect a single‑mode LC fiber cable to the module. The transceiver supports hot‑swap, so it can be inserted or removed without powering down the host if the host device supports hot‑pluggable modules. Monitor the module status and diagnostics via the host switch management interface if available.
Usage recommendations
Use single‑mode LC fiber and ensure proper polishing and cleanliness of connectors. Verify host compatibility with SFP‑MSA modules and enable DDM monitoring in the switch for real‑time diagnostics. For reliable links, match transceiver wavelength and fiber type at both ends and observe the industrial temperature limits during deployment.

## Specifications

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum operating temperature | 85 °C |
| Hot-swap | Yes |
| Maximum transfer distance | 20000 m |
| Fiber cable diameters supported (core/cladding) | 9/125 |
| SFP transceiver type | Fiber optic |
| Minimum operating temperature | -40 °C |
| Single-mode fiber (SMF) supported | Yes |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 85 |
| Storage temperature (T-T) | -40 - 85 |
| Storage relative humidity (H-H) | 5 - 85 |

### Certificates

| Feature | Value |
|---|---|
| Certification | FCC, CE |

### Power

| Feature | Value |
|---|---|
| Input voltage | 3.3 |

### Performance

| Feature | Value |
|---|---|
| Maximum data transfer rate | 1250 Mbit/s |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 11 mm |
| Width | 56.4 mm |
| Depth | 13.4 mm |

### Optical fiber

| Feature | Value |
|---|---|
| Wavelength | 1310 nm |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Other features

| Feature | Value |
|---|---|
| Ethernet interface type | 1.25 Gigabit Ethernet |

### Design

| Feature | Value |
|---|---|
| Product colour | Grey |

### Network

| Feature | Value |
|---|---|
| Networking standards | IEEE 802.3z |

### Ports & interfaces

| Feature | Value |
|---|---|
| Fiber optic connector | LC |

## FAQ

### How much does the SFP fiber transceiver TP-Link ISM311LS cost, and is it available for purchase?

The price is 19.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 31 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 01.07.2026 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, 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 TP-LINK 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 TP-LINK 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: product colour, networking standards, 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/11545911/67044003_large.webp