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header-product SFP fiber optic transceiver TP-Link ISM311LS 1250 Mbit/s 1310 nm, 3.3 V, grey
12.99 €

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

SFP fiber transceiver TP-Link ISM311LS Photo 1
SFP fiber transceiver TP-Link ISM311LS Photo 2
SFP fiber transceiver TP-Link ISM311LS Photo 3
SFP fiber transceiver TP-Link ISM311LS Photo 1
SFP fiber transceiver TP-Link ISM311LS Photo 2
SFP fiber transceiver TP-Link ISM311LS Photo 3
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SFP fiber optic transceiver TP-Link ISM311LS 1250 Mbit/s 1310 nm, 3.3 V, grey

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

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Short 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.
Available at price 12.99 €: 7 pcs.
Total available for order: 95 pcs.
Warranty: 2 Years
SKU: 11545911
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
09.11.2026 {{selectedOffer.officeDeliveryString}}
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From 4.99 € (Weight: 0.07 kg)
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Product information

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

Networking standards: The way in which the network is working, e.g. IEEE 802.11a, IEEE 802.11b, IEEE 802.11g.
IEEE 802.3z
All features
Interface type:
SFP
Hot-swap:
Yes
Maximum transfer distance: The greatest distance over which the data/signal can be transferred.
20000 m
Fiber cable diameters supported (core/cladding):
9/125
SFP transceiver type:
Fiber optic
Single-mode fiber (SMF) supported:
Yes

Logistics data

Quantity per pack:
1 pc(s)

Certificates

Certification:
FCC, CE

Technical details

Maximum operating temperature:
85 °C
Minimum operating temperature:
-40 °C

Weight & dimensions

Height: The measurement of the product from head to foot or from base to top.
11 mm
Depth: The distance from the front to the back of something.
13.4 mm
Width: The measurement or extent of something from side to side.
56.4 mm

Operational conditions

Storage relative humidity (H-H):
5 - 85
Operating relative humidity (H-H):
5 - 85
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.
-40 - 85

Other features

Ethernet interface type:
1.25 Gigabit Ethernet

Power

Input voltage: The voltage (V) which is required to power the product.
3.3

Performance

Maximum data transfer rate: The maximum speed with which data can be transmitted from one device to another.
1250 Mbit/s

Design

Product colour: The colour e.g. red, blue, green, black, white.
Grey

Optical fiber

Wavelength: The distance over which a wave repeats itself. The wavelength determines the characteristics of the wave e.g. red light has a different wavelength to blue light.
1310 nm

Network

Networking standards: The way in which the network is working, e.g. IEEE 802.11a, IEEE 802.11b, IEEE 802.11g.
IEEE 802.3z

Ports & interfaces

Fiber optic connector: This terminates the end of an optical fiber, and enables quicker connection and disconnection than splicing. The connectors mechanically couple and align the cores of fibers so light can pass. Better connectors lose very little light due to reflection or misalignment of the fibers. In all there have been about 100 types of optic fiber connectors produced.
LC

Description

Machine translation.

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Product comparison

The TP-Link ISM311LS fiber optic transceiver is compared against industrial alternatives TP-Link ISM321A-20 and TP-Link ISM321B-20. While all three support data transfer rates up to 1250 Mbit/s and IEEE 802.3z networking standards, the TP-Link ISM311LS is designed for standard network switches and environments, whereas the alternative models are built for demanding industrial settings, longer distances up to 20 km, and WDM bidirectional communication.

⚙️ The specifications comparison covers data transfer rates, supported networking standards, communication technologies, operational distances, and environmental suitability.

ParameterTP-Link ISM311LSTP-Link ISM321A-20TP-Link ISM321B-20Practical conclusion
Data rate1250 Mbit/s1250 Mbit/s1250 Mbit/sAll options deliver the same high-speed gigabit performance.
Networking standardsIEEE 802.3zIEEE 802.3zIEEE 802.3zEnsures standard compatibility across compatible networking hardware.
Technology and distanceStandard SFP transceiverWDM, up to 20 kmWDM, up to 20 kmAlternative modules support long-range transmission over a single fiber strand using WDM technology.
Operating environmentStandard network devicesIndustrial-grade (-40°C to 85°C)Industrial-gradeAlternative modules are engineered to withstand extreme temperatures in harsh industrial locations.

◎ Suitability and use case comparison helps identify which product fits specific deployment scenarios.

Use caseRecommended productWhy
Standard office or indoor network switchesTP-Link ISM311LSBest suited for standard server rooms and indoor networking environments without extreme temperatures.
Industrial sites and long-distance linksTP-Link ISM321A-20 or TP-Link ISM321B-20Provides wide temperature tolerance and single-fiber transmission over distances up to 20 km.
TP-Link ISM311LS differs from the industrial alternatives by focusing on standard indoor networking environments and standard link distances. It is the ideal choice for typical network switches, while the alternative models are better suited for harsh industrial deployments requiring extended range and temperature resistance.
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Stock data
Warehouse Stock Delivery to the store Store Price
WH155 7 09.11.2026 Best delivery
12.99 € Best price
EU3 16 09.11.2026 Best delivery
28.99 €
WH320 16 09.11.2026 Best delivery
35.99 €
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Warehouse Stock Delivery to the store Store Price
WH109 16 24.11.2026
36.49 €
12.99 €
Stock: 7
Delivery Date: 09.11.2026 Best delivery
Warehouse: WH155
28.99 €
Stock: 16
Delivery Date: 09.11.2026 Best delivery
Warehouse: EU3
35.99 €
Stock: 16
Delivery Date: 09.11.2026 Best delivery
Warehouse: WH320
37.49 €
Stock: 30
Delivery Date: 09.11.2026 Best delivery
Warehouse: WH94
44.49 €
Stock: 10
Delivery Date: 09.11.2026 Best delivery
Warehouse: WH353
Available only for legal entities
36.49 €
Stock: 16
Delivery Date: 24.11.2026
Warehouse: WH109

Customer reviews

Customer questions

FAQ

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

The price is 12.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 95 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 09.11.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: 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.
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