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DEC M5922 RMOX Massbus MAU Transceiver Module
- Interface: Massbus
- Network Type: Ethernet
- Function: MAU (Media Access Unit) Transceiver
- Compatibility: DECnet systems
- Connector: Specific to Massbus transceiver cable
- Enables connection to Thicknet (10BASE5) or Thinnet (10BASE2) coaxial Ethernet
- Designed for Digital Equipment Corporation (DEC) systems
- Provides physical layer signaling
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Product Overview
The DEC M5922 is a Massbus MAU (Media Access Unit) transceiver module, designed to connect DECnet or other systems utilizing the Massbus interface to an Ethernet network. It provides the physical layer interface for the transceiver medium.
Technical Information
| Interface | Massbus |
| Network Type | Ethernet |
Additional Specifications
| Function | MAU Transceiver |
| Manufacturer | DEC |
Product Description
The DEC M5922 module serves as a critical component in older Digital Equipment Corporation (DEC) networking architectures that relied on the Massbus interface. This interface was commonly used for connecting high-performance peripherals and network controllers to DEC VAX and PDP-11 systems. The M5922 specifically acts as a Media Access Unit (MAU) transceiver, translating signals between the Massbus system and the Ethernet physical medium. This transceiver module facilitates the connection of DEC systems to Ethernet networks, enabling communication with other devices on the LAN. Depending on the specific implementation and associated cabling, it would typically interface with either Thicknet (10BASE5) coaxial cable using an N-type connector or Thinnet (10BASE2) coaxial cable using a BNC connector, although the primary interface is the Massbus connection to the host system. As a legacy networking component, the M5922 is representative of the hardware used in early Ethernet deployments. Its function was to provide the necessary electrical and signaling conversion to allow DEC's proprietary bus architecture to interact with the standardized Ethernet physical layer, bridging the gap between the system's internal data paths and the external network cabling.
