1. Product Overview

Product Name: AT-MC102XL
Model: AT-MC102XL
Series: Allied Telesyn Fast Ethernet Media Converter Series
Article Number: 617-00275-05
Manufacturer: Allied Telesyn International Corp.

The Allied Telesyn AT-MC102XL is a compact, standalone Fast Ethernet media converter designed to extend the reach of twisted-pair (UTP) copper networks using multimode or singlemode fiber optic cabling. It provides seamless conversion between 100Base-TX (UTP) and 100Base-FX (fiber) interfaces, enabling network administrators to integrate fiber segments into existing copper-based infrastructures. The converter supports both SC fiber connectors and UTP RJ-45 interfaces, offering flexible deployment options for enterprise, campus, and industrial network environments.

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2. Key Features

- Media Conversion: Converts 100Base-TX (UTP) to 100Base-FX (fiber optic) for extended network distances.
- Fiber Compatibility: Supports both multimode and singlemode fiber types, including long-haul (LH) variants for extended reach up to 40 km.
- Auto-Negotiation: Automatically detects and configures full-duplex or half-duplex operation when connected to Fast Ethernet auto-negotiation switches, ensuring optimal bandwidth utilization.
- “Missing Link” Function: Provides real-time link status feedback to network management systems. If a fiber link fails, the converter signals the connected switch, enabling automatic failover to redundant links.
- MDI/MDIX Auto-Crossover: Built-in switch allows direct connection to PCs, hubs, or switches using standard twisted-pair cables without requiring crossover cables.
- Link Test Function: Enables verification of fiber link integrity during installation without specialized test equipment.
- Standalone or Rack-Mountable: Operates as a standalone unit with an external power supply or can be installed in a 19-inch rack chassis (up to 12 units per chassis) for centralized power and management.
- LED Indicators: Front panel LEDs provide clear visual feedback for power, link status, data reception, and test mode.
- High Reliability: Backed by Allied Telesyn’s lifetime functional warranty and free technical support, ensuring long-term operational stability.

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3. Technical Specifications

- Dimensions: 105 mm (W) × 95 mm (D) × 25 mm (H)
- Weight: 294 g
- Operating Temperature: 0°C to +50°C
- Storage Temperature: -20°C to +80°C
- Relative Humidity: 5% to 80% (non-condensing)
- Power Supply: External 12 VDC ±5%
- Power Consumption: 6 W (maximum), 500 mA current draw
- Round Trip Delay: 0.4 µs (maximum)
- Bit Error Rate (BER): < 10⁻⁹

Mechanical and Electrical Certifications:
- EMC: FCC Class A, IC Class A
- Safety: UL, CSA, TÜV, IEC 825-1
- Compliance: CE Marked

Chassis Compatibility:
- Supports installation in Allied Telesyn 19” rack chassis (up to 12 converters per chassis).
- Optional redundant internal power supply for critical applications.

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4. Functionality

The AT-MC102XL functions as a layer 1 media converter, bridging the electrical Ethernet signal from twisted-pair copper cabling to optical signals transmitted over fiber. It operates transparently, maintaining the original Ethernet frame structure and timing, ensuring compatibility with all standard Fast Ethernet devices.

Use Cases and Applications:
- Extending LAN segments beyond the 100-meter copper limitation using fiber optic cabling.
- Connecting remote buildings or network segments within a campus environment.
- Integrating fiber backbones into existing copper-based networks.
- Providing fiber uplinks for switches, routers, or servers located at distant sites.
- Supporting redundant network topologies with automatic failover via the “Missing Link” feature.

Compatibility:
- Fully compliant with IEEE 802.3u 100Base-TX/100Base-FX standards.
- Compatible with multimode (MM) and singlemode (SM) fiber optic cables.
- Supports SC fiber connectors and RJ-45 UTP interfaces.
- Works with standard Category 5 or better twisted-pair cabling.

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5. Components & Accessories

Included Items:
- AT-MC102XL media converter unit
- External 12 VDC power adapter
- User documentation and installation guide

Optional Accessories:
- 19” rack-mount chassis (supports up to 12 converters)
- Redundant internal power supply module for chassis
- Fiber patch cables (multimode or singlemode, SC connectors)
- UTP Category 5/5e/6 patch cables

Front Panel Indicators:
- Power: Indicates active power supply.
- Link (2): Shows valid link status for both fiber and UTP ports.
- Receive (2): Indicates data reception activity.
- Normal/Test: Switch for operational mode or fiber link test mode.

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6. Installation & Setup

Requirements:
- Power source providing 12 VDC ±5% at 500 mA.
- Appropriate fiber optic cabling (multimode or singlemode) with SC connectors.
- Category 5 or higher twisted-pair cable for UTP connection.

Mounting Options:
- Standalone Operation: Place on a flat surface near the connected devices.
- Rack Installation: Mount up to 12 converters in an Allied Telesyn 19” chassis for centralized deployment.

Configuration Steps:
1. Connect the UTP port to a switch, hub, or PC using a standard Ethernet cable.
2. Connect the fiber port to the corresponding fiber network segment using SC connectors.
3. Apply power via the external adapter or chassis power supply.
4. Verify LED indicators for link and activity status.
5. (Optional) Activate the Link Test mode to verify fiber integrity before full deployment.

MDI/MDIX Functionality:
The built-in MDI/MDIX switch automatically detects cable type, eliminating the need for crossover cables.

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7. Performance & Capabilities

Transmission Distances:
- UTP (Category 5): Up to 100 m
- FX Multimode Fiber:
- Full Duplex: up to 2000 m
- Half Duplex: up to 412 m
- FX Singlemode Fiber:
- Full Duplex: up to 15 km
- Half Duplex: up to 412 m
- FX Singlemode Long Haul (LH):
- Full Duplex: up to 40 km
- Half Duplex: up to 412 m

Optical Interface (Multimode 100FX):
- Wavelength: 1300 nm (typical), range 1200–1300 nm
- Receiver Sensitivity: -34.5 dBm
- Maximum Output Power: -14 dBm

Optical Interface (100SX):
- Wavelength: 830 nm (typical), range 810–850 nm
- Receiver Sensitivity: -30 dBm
- Maximum Output Power: -12 dBm

Optical Interface (Singlemode 100BaseFX):
- Wavelength: 1300 nm (typical), range 1261–1360 nm
- Receiver Sensitivity: -31 dBm
- Optical Output Power:
- Typical: -13.9 dBm
- Minimum: -15 dBm
- Maximum: -8 dBm

Optical Interface (Singlemode Long Haul):
- Wavelength (TX): 1280–1335 nm
- Wavelength (RX): 1260–1360 nm
- Receiver Sensitivity:
- Typical: -38 dBm
- Maximum: -35 dBm
- Output Power:
- Typical: -3 dBm
- Range: -5 to 0 dBm

Twisted Pair Interface (100Base-TX):
- Differential Output Voltage: 950–1050 mV (typical 980 mV)
- Overshoot Voltage: ≤5% (typical 4%)
- Amplitude Symmetry: 0.98–1.02 (typical 1.0062)
- Rise Time: 3.0–5.0 ns (typical 4.6 ns)
- Fall Time: 3.0–5.0 ns (typical 4.2 ns)
- Rise/Fall Time Symmetry: ≤0.5 ns (typical 0.4 ns)

Performance Characteristics:
- Transparent data conversion with minimal latency.
- Full duplex and half duplex operation supported.
- BER < 10⁻⁹ ensures high data integrity.
- Round trip delay of 0.4 µs maximum for efficient packet forwarding.

Limitations:
- Designed for Fast Ethernet (100 Mbps) only; not compatible with Gigabit Ethernet.
- Requires appropriate fiber type and connector matching for optimal performance.

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8. Standards & Compliance

Network Standards:
- IEEE 802.3u 100Base-TX/100Base-FX Fast Ethernet
- IEEE 802.3x Full Duplex Flow Control

Safety and Regulatory Compliance:
- EMC: FCC Class A, IC Class A
- Safety: UL, CSA, TÜV, IEC 825-1
- CE Compliance: Meets European safety and electromagnetic compatibility requirements.

Optical Safety:
- Complies with IEC 825-1 laser safety standards for Class 1 laser products.

Environmental Compliance:
- Operating temperature range suitable for standard office and light industrial environments.
- Non-condensing humidity tolerance up to 80%.

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9. Additional Information

Warranty and Support:
- Lifetime Functional Warranty: Allied Telesyn provides an unlimited functional warranty for all Fast Ethernet media converters, ensuring long-term reliability.
- Free Technical Support: Comprehensive technical assistance available through Allied Telesyn regional offices and online resources.

Maintenance:
- No moving parts; minimal maintenance required.
- Periodic inspection of fiber connectors recommended to maintain optimal signal quality.
- Firmware updates not required, as the device operates at the physical layer.

Service and Replacement:
- Hot-swappable when used in rack chassis configurations.
- Replacement units available through Allied Telesyn authorized distributors.

Manufacturer Contact Information (Regional Offices):
- United Kingdom: Allied Telesyn International Ltd., 70 Milton Park, Abingdon, Oxon, OX14 4RX
Tel: +44 (0)1235 442500 | Fax: +44 (0)1235 442590 | Freephone: 0800 204040
- Germany (North): Allied Telesyn International GmbH, Wittestraße 30N, 13509 Berlin
Tel: +49-(0)30-435 9000 | Fax: +49-(0)30-435 70650 | Freephone: 00 800-255 433 10
- Germany (South): Allied Telesyn International GmbH, Gute Änger 13, 85356 Freising
Tel: +49-(0)8161-99 060 | Fax: +49-(0)8161-99 0622
- Austria (Eastern Europe Office): Fleschgasse 32/6, 1130 Wien
Tel: +43-(0)1-8762441 | Fax: +43-(0)1-8762572
- France: Allied Telesyn International S.A., 6 Avenue des Andes, Bâtiment 5, Z.A. de Courtaboeuf, 91952 Les Ulis Cedex
Tel: +33 01 60 92 15 25 | Fax: +33 01 69 28 37 49
- Italy: Allied Telesyn International Srl, Via Anna Kuliscioff 31, 20152 Milano
Tel: +39 0241 6047 | Fax: +39 0241 9282
- Spain: Allied Telesyn International Srl, Representative Office, Orense 85, 28020 Madrid
Tel: +34 91-5678441 | Fax: +34 91-5678442

Corporate Website: [www.alliedtelesyn.com](http://www.alliedtelesyn.com)

Copyright Notice:
© Allied Telesyn International Corp. All rights reserved. Specifications subject to change without notice. Allied Telesyn, AT-View, and associated logos are trademarks or registered trademarks of Allied Telesyn International Corp.

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Summary

The Allied Telesyn AT-MC102XL is a robust, high-performance Fast Ethernet media converter engineered for professional network environments requiring reliable copper-to-fiber connectivity. With support for multimode and singlemode fiber, automatic duplex negotiation, and advanced diagnostic features like “Missing Link” and link testing, it ensures seamless integration and dependable operation across diverse network topologies. Its compact design, flexible mounting options, and compliance with international safety and EMC standards make it an ideal solution for enterprise, campus, and industrial network extensions. Backed by a lifetime warranty and global technical support, the AT-MC102XL delivers enduring value and performance in mission-critical networking applications.