The Allied Telesis CentreCOM AT-MC12T is a media converter that bridges 10BASE-T Ethernet networks with legacy AUI/F interfaces, enabling communication between modern infrastructure and older networking hardware. Signal conversion occurs at the physical layer, allowing AUI-equipped devices to operate on 10BASE-T networks when paired with an appropriate external transceiver (MAU). The compact form factor—measuring 4.2 cm × 7 cm × 2 cm and weighing 0.35 lbs—supports installation across diverse networking environments.
Technical Specifications
• Data Rate: 10 Mbps maximum
• Primary Interface: 10BASE-T Ethernet (RJ45 female connector)
• Legacy Interface: AUI/F (15-pin male connector via external transceiver)
• Protocol Support: Ethernet, IEEE 802.3
• Power Input: 12 VDC to 18 VDC, 700 mA maximum draw
• Dimensions: 4.2 cm (W) × 7 cm (L) × 2 cm (H)
• Weight: 0.35 lbs (excluding power adapter)
– Key Features
• MDI/MDI-X Switch: Integrated selector eliminates the need for specialized crossover cables. MDI-X (default) connects to DTE devices; MDI connects to repeaters, hubs, or concentrators using straight-through cabling.
• Status LEDs: Four indicators display power, receive data, collision detection, and link/activity status adjacent to the 10BASE-T port.
• External Transceiver Architecture: Requires an external MAU for specific media conversions (10BASE-FL for fiber optic, 10BASE2 for thin coaxial). The attached transceiver must have SQE (heartbeat) testing disabled for proper operation.
• External Power Adapter: Required for unit and transceiver operation; delivers 12 VDC at 1 A (unregulated).
– Typical Applications
• Legacy network modernization and expansion
• Integration of older AUI-equipped hardware with contemporary 10BASE-T infrastructure
• Cross-media conversion when paired with appropriate transceiver modules
– Compatibility & Integration
The AT-MC12T operates as an external transceiver enclosure, accommodating third-party MAUs for diverse conversion scenarios. Direct integration with 10BASE-T networks via standard RJ45 cabling; AUI connectivity requires external MAU attachment with SQE disabled.
