56System architecture
Call processing, maintenance, and administration are controlled by software programs stored either as firmware programs, as software programs resident in system memory, or as nonresident programs on disk. The information that describes system configuration and associated IPE is called office data. This data resides in the system memory and on disk.
Firmware
Firmware provides fundamental programs consisting of
Software
Software programs consist of instruction sequences that control call processing, IPE, administration, and maintenance functions. Several generic software programs with optional feature packages are available.
Office data
Office data describes the characteristics of the system in terms of configuration and
Resident programs
Resident programs are always available in memory during system operation. Some resident programs are permanently programmed into the ROM portion of system memory. Other resident programs are automatically loaded into system memory at system
Resident programs include:
•Error Monitor, which continuously monitors call processing
•Initialize Program, which locates faults, rebuilds data, and releases reserve memory areas
•Overlay Loader, which locates, checks, and loads programs into the overlay area
•Overload Monitor, which monitors the volume of system messages and determines where overloads occur
•Resident Trunk Diagnostic, which monitors all trunk calls
•System Loader, which loads resident programs from the disk drive unit into system memory at
•Traffic Monitor, which examines the system schedule, transfers traffic data from accumulating to holding registers, and produces reports
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Large System Overview
30 September 2008