ISM311LS - TP-Link 1000Base-LX & 1000Base-SX Single-Mode Industrial SFP Module (ISM311LS & ISM311LM)
Description
Description
The TP-Link ISM311LS is a 1000Base-LX single-mode industrial SFP module designed to extend fibre transmission distance when attached to compatible industrial switches. Supplied alongside its multi-mode sibling, the ISM311LM 1000Base-SX industrial SFP module, this series gives you flexibility to choose the fibre type that suits your site. Fitted to TP-Link industrial switches, the ISM311LS can extend the link distance to 20 km, while the ISM311LM reaches 550 m over multi-mode fibre. Because you can choose whether and which modules to use, you can keep costs down to match your requirements.
Built for tougher environments than standard commercial modules, the industrial SFP series supports an extended operating temperature range of -40°C to 85°C (-40°F to 185°F), making it well suited to factory, outdoor and transport deployments. The module works without any additional configuration once installed, and it is hot-swappable, so you can fit or replace it with minimal fuss.
Key Features
- Single-mode SFP LC transceiver (ISM311LS) with a 1310 nm wavelength and up to 20 km reach over 9/125 µm single-mode fibre
- Multi-mode option (ISM311LM) at 850 nm, with up to 550 m over 50/125 µm or 62.5/125 µm multi-mode fibre
- Industrial operating temperature range of -40°C to 85°C
- Supports Digital Diagnostic Monitoring (DDM)
- Compatible with the Small Form Pluggable Multi-Source Agreement (SFP-MSA)
- Hot-pluggable for maximum flexibility
- 1.25 Gbps data rate with a duplex LC/UPC connector
- Standards: IEEE 802.3z, TCP/IP
- 3.3 V power supply, Class 1 laser, FCC and CE certified
- Compact dimensions of 56.4 × 13.4 × 10.97 mm
Ideal for: network integrators, industrial automation sites, factories, transport and outdoor deployments that need reliable gigabit fibre uplinks in extreme temperatures.
Compatible Products
TP-Link's installation guide lists the following as compatible TP-Link devices with gigabit SFP slots: MC220L and MC420L. TP-Link also states that the SFP modules may be incompatible with other vendors' devices, and recommends using TP-Link SFP modules on TP-Link devices. For reliable connectivity, use the same transceiver model at both ends of the link.
Technical Summary
Model ISM311LS: 1000Base-LX, 1310 nm, single-mode fibre, 20 km maximum, laser output power up to 0.794 mW (-1 dBm). Model ISM311LM: 1000Base-SX, 850 nm, multi-mode fibre, 550 m maximum, laser output power up to 0.398 mW (-4 dBm). Both models use LC duplex ports and share the same hardware features.
Frequently asked questions5 questions
What fibre type and distance does this SFP module support?
Can it operate in extreme temperatures?
Is this module hot-swappable and does it support diagnostics?
Is it compatible with standard SFP slots?
What warranty and box contents come with it?
Payment & Security
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About TP-Link
Stable, high-performance solutions at an affordable price.
TP-Link is an award-winning pioneer in wireless technologies that is trusted by billions of customers around the world to optimise their network connectivity. Established in 1996, the company has built a diverse portfolio of world-first solutions designed to streamline the user experience. TP-Link is continuously expanding its offering, integrating the latest in AI and industrial wireless technologies to develop high quality, high value solutions for the business and smart home markets.
TP-Link's flagship B2B brands Omada and VIGI deliver integrated networking and surveillance solutions for business of all shapes and sizes. Omada is a one-stop shop that offers a broad range of end-to-end, unified networking devices. VIGI provides powerful, efficient and user-friendly network surveillance products. TP-Link also provides wireless and smart home solutions direct to its global consumer base. Delivered through top-selling brands like DECO and TAPO, these solutions allow anyone to effortlessly curate and scale their smart home implementations and boost connectivity.
TP-Link's dedication to quality, innovation and user satisfaction has seen it consistently ranked as a top provider of Wi-Fi devices. For superior network connectivity, surveillance and smart home solutions at an affordable price, choose TP-Link.
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Why buy from The Tech Geeks?
As an Official Australian Partner TP-Link partner, we have years of experience sourcing the best TP-Link solutions, and many happy customers to prove it!
The Tech Geeks can vouch for the quality, reliability and usability of TP-Link's core products. We love the thoughtful design of VIGI’s surveillance solutions – simple yet durable, highly-efficient and powerful. VIGI’s product portfolio also includes a range of flexible, low-cost solar power options, which will save you money and deliver peace of mind. Omada’s feature-rich product portfolio pairs integrated security with intuitive interfaces, so you can enjoy a stable and secure network environment without tricky installations.
While customers typically opt for centralised device management with the Omada Controller, all Omada devices can be operated separately in Standalone mode, a feature unique to Omada. We also stock DECO, TP-Link’s range of AI enabled mesh solutions that work to enhance the home Wi-Fi experience. The DECO range is perfect for the home environment, especially if you need a reliable and sleek solution for your
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