2-72 Section 060-INDP-111 System Description
297-6201-502 Standard 01.02 September 2000
are provided to convert the raw data to the required format before processing
any further.
Other application routines manage events that must be scheduled on a regular
basis. Call record report generation and BMC processor switchovers are two
examples of the events directed by these application modules.
Command and response application routines permit user intervention with
system variables. Disk parameters, site data, and BMC user file maintenance
are all made possible through these command and response routines. The
command modules are used to recognize keyboard inputs from the terminal
which are passed through the Switching System to the BMC. Response
modules return prompt or comment statements back through the system to the
terminal to provide replies to system queries. The commands are response
application routines to allow a user friendly human-machine interface
operation by providing the translation between the BMC code and the English
language.
One section of the application is dedicated to defining error messages
associated with the BMC. A fault in the BMC is analyzed by the alarm
application routines and classified according to its severity. Fault messages
are then generated from this information and sent to the terminal to alert
maintenance personnel of the difficulty.
Interface routines
The TEC/DSI PCAs employ a microprocessor to control the data handling
activities. This microprocessor requires its own programs to direct its local
operations and to interpret instructions from the BMC microprocessor. The
TEC/DSI application routines are subdivided into communication, tape drive
emulation, and data transfer module groups. The data is moved using DMA
to read and write to RAM. The communications modules allow the BMC to
respond to system commands without having to reprogram the Switching
System. The communications package controls the link between the
Switching System and the TEC/DSI.
The TEC/DSI provides an active interface by emulating the tape drive
functions and providing two-way communication between the BMC and
Switching System.
Disk routines
The SCSI Interface PCA has its own microprocessor and software routines.
Read, write, and retry (error recovery) instructions are resident in the disk
interface circuitry. Disk initialization, buffer management, directory
management, and file management modules are part of the disk programs.
There is also a communications package and an input/output handler program
included in the disk routines.
To Next Page
Loading...
Need help?
General
