Chapter 1
1.3b System Description for DNCP Series 400-CO (PA-8500)
DNCP Series 400-CO (PA-8500) system combines the Hewlett-Packard PA-RISC PA-8500 microprocessor, system features rapid symmetric multiprocessing and continuously available hardware. Designed specifically for the CO environment, the system is fully CO-compliant, including support of Zone 4 seismic resilience standards. This system uses DC power. The DNCP Series 400-CO (PA-8500) system utilizes the FTX operating system.
The DNCP Series 400-CO (PA-8500) achieves continuous availability by partnering, or duplexing, two identical online components, so that if one fails, its partner continues to operate. Other system components ensure availability by operating in standby mode , with one component online, while the other "stands by" to take over operation should its partner fail.
The DNCP Series 400-CO (PA-8500) must be installed by a qualified service technician, but most of the components are customer-maintainable. Its data communications subsystem, based on a Peripheral Component Interconnect (PCI) bus, utilizes state-of-the-art PCI cards. Peripherals include T800-series cartridge tape drives, D85X CD-ROM drives, V105 terminals, and C419/C619 modems, which are described later in this chapter. See Figure 1.5 for an illustration of the DNCP Series 400-CO (PA-8500) system installed in a typical computer-room environment. The sections that follow describe DNCP Series 400-CO (PA-8500) components.
Figure 1.5. DNCP Series 400-CO (PA-8500) System in a computer-room environment
