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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
Chapter 1