Keysight / Agilent / HP J3420B HP-HSC ATM/155 Adapter

The Keysight/Agilent/HP J3420B is a High-Speed Channel (HSC) ATM adapter designed for 155 Mbps asynchronous transfer mode networking on HP 9000 Precision Architecture systems. This VME bus-compatible interface card integrates application-specific integrated circuits (ASICs) to deliver core I/O functionality, enabling high-speed ATM connectivity in HP 744 series board computers and compatible platforms. The adapter supports 155 Mbps MMF (Multi-Mode Fiber) ATM links and provides expandability for additional I/O or RAM within the VME architecture.

Technical Specifications

Manufacturer: Keysight / Agilent / HP

Model: J3420B

Data Rate: 155 Mbps ATM

Interface Type: High-Speed Channel (HSC) ATM

Form Factor: VME Bus compatible, single-slot configuration

Technology: Application-Specific Integrated Circuits (ASICs) for core I/O functions

Network Connectivity: Multi-Mode Fiber (MMF) ATM at 155 Mbps

Key Features

ASIC-based architecture for dedicated I/O processing

VME bus integration with expandability options

Support for 155 Mbps ATM transmission rates

Designed around HP Precision Architecture workstation core I/O

Multi-Mode Fiber optical connectivity for high-speed links

Typical Applications

ATM network interfaces in HP 9000 Precision Architecture systems

High-speed data communications on HP 744 series board computers

VME-based systems requiring dedicated 155 Mbps ATM connectivity

Research and industrial computing environments using HP PA platforms

Compatibility & Integration The J3420B is primarily designed for HP systems, with documented compatibility for the HP 9000 Model 744 Precision Architecture board computers, including variants such as the 744/132L and 744rt/165L. The adapter operates within a VME environment and integrates core I/O functionality equivalent to HP-PA workstation specifications. Operating system support aligns with the HP 744 series platform capabilities.