Description
Product Introduction
The Allied Telesis AT-MX40FST-05 (MX40F/ST-05) is a legacy Fast Ethernet fiber optic transceiver module engineered for modular Allied Telesis chassis switches and media converters. Operating at 100 Mbps, this hardware card bridges standard internal switch backplanes with multi-mode fiber optic cabling, enabling high-bandwidth data transmission across electrically noisy industrial facilities.
Featuring a dual ST connector interface, the AT-MX40FST-05 provides galvanic isolation over transmission distances up to 2 kilometers. Unlike copper cabling, this optical layer completely eliminates susceptibility to electromagnetic interference (EMI) and ground loops, making it an essential plug-in upgrade for interconnecting remote control buildings or wiring closets in heavy manufacturing plants.
Key Technical Specifications
| Parameter | Value |
| Product Line | MX40 Series Modular Transceivers |
| Device Type | 100Base-FX Fiber Optic Transceiver |
| Data Transfer Rate | 100 Mbps Fast Ethernet |
| Media Type | Multi-Mode Fiber (MMF) |
| Maximum Transmission Distance | Up to 2.0 kilometers |
| Optical Connector Type | Dual ST Connectors |
| Wavelength | 1310 nm nominal |
| Form Factor | Modular plug-in card for Allied Telesis chassis switches |
| Operating Temperature | 0 °C to 40 °C (32 °F to 104 °F) |
Application Scenarios & The “Trench” Experience
Picture this: It is 2:30 AM during a heavy production shift when the telemetry link between the main plant switchroom and a remote wastewater lift station drops flat. Troubleshooting reveals that a lightning-induced ground surge traveled across copper Ethernet runs, frying the port transceiver on an older Allied Telesis modular switch. Operations are blind on critical environmental monitoring loops, and waiting weeks for modern fiber switch conversions is not an option. You pull a certified surplus AT-MX40FST-05 off the shelf, slide it into the chassis slot, re-seat the ST fiber patch cables, and re-establish network communication instantly.
- Municipal Water & Wastewater Plants: Interconnecting remote control buildings across long multi-mode fiber optic runs immune to ground potential differences.
- Manufacturing Plant Backbone Links: Bridging isolated switch racks across sprawling industrial shop floors with high electrical noise.
- Substation Auxiliary Networks: Linking automation control enclosures where high-voltage switchgear transient protection is mandatory.
AT-MX40FST-05
AT-MX40FST-05
Transparency SOP: Quality Assurance & Testing
We don’t just ship boxes; we test them on actual Allied Telesis switch test benches. Every surplus AT-MX40FST-05 unit goes through a strict verification process before leaving our warehouse:
- Inbound Inspection: Physical check for pin integrity, latch mechanisms, optical port cleanliness, and OEM label verification.
- Live Chassis Insertion: Installed into a dedicated Allied Telesis modular switch test rack to verify backplane bus recognition and link handshake.
- Optical Power Meter Testing: Transmitting test patterns at 1310 nm to measure launch optical power and receiver sensitivity across multi-mode fiber loops.
- Thermal Stress Check: Running sustained data traffic packets to confirm stability under operating temperature loads.
- Final QC & Anti-Static Packaging: Optical port protective dust caps applied, sealed in anti-static bubble wrap, and packed in heavy-duty shipping cartons.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Power Down Before Insertion: Never hot-swap modular transceiver cards unless the switch chassis explicitly supports live online maintenance for that slot. Dropping a card into an energized legacy backplane can cause bus lockups or transient spikes that damage the module.
- ❗ Match Fiber Modes: Ensure you are connecting this multi-mode (MMF) 1310nm transceiver to multi-mode fiber patch cables. Plugging single-mode (SMF) fiber into an MMF transceiver will result in extreme optical insertion loss and complete link failure.
- ⚠️ Inspect ST Ferrule Cleanliness: Always clean your ST fiber connectors with optical lint-free wipes and isopropyl alcohol before snapping them onto the module ports. Microscopic dust on the ferrule tip will degrade optical power budgets and cause intermittent packet drops.
Frequently Asked Questions (FAQ for Conversion)
Q: Is the AT-MX40FST-05 compatible with single-mode fiber cables?
A: No. This module is designed specifically for multi-mode fiber (MMF) networks with a maximum span of 2 kilometers. Single-mode deployment requires dedicated SMF transceivers.
Q: Are these transceiver modules brand new or refurbished?
A: Our inventory consists primarily of New Surplus and Factory Sealed stock sourced from enterprise networking liquidations. Every unit undergoes live optical power bench testing prior to shipment.
Q: Why buy surplus legacy transceivers instead of upgrading the entire switch?
A: Replacing an entire legacy switch architecture often forces costly software recertification, VLAN reconfiguration, and rewiring. Sourcing certified surplus modules allows you to keep existing infrastructure running reliably at a fraction of the cost.
Q: What warranty is included with purchase?
A: Every AT-MX40FST-05 ships with our comprehensive 12-month replacement warranty.
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