The 5ESS switching system: Physical design/hardware

The reliability, availability, and versatility of the 5ESS™ switch are highly dependent on the physical design of the hardware. We present a comprehensive description of the system and equipment designs, with particular emphasis on the advanced interconnection technology used, such as the fine-line, multilayer, printed wiring boards; ceramic substrates for functional modules; and high-performance, device-level packaging. The system design features described include new cabinet and office arrangements, the use of Fastech™ equipment, and new power and alarm systems. The office layout is flexible to allow growth in any size installation, and the modular architecture of the 5ESS switch makes it easy to install. We also present various testing and installation methods and summarize the physical design requirements and objectives for all equipment in the 5ESS system.