Stored program control type electronic exchange system
First Claim
1. A stored program type electronic exchange system for use with equipment for generating dials signals, said system comprising a pluraltiy of trunks, including at least an originating register trunk and an outgoing sender trunk for converting the dial signals between serial pulse signals and parallel character signals and communicating with a programmed computer, character by character, the rest of said trunks fulfilling various compound functions including counting, storing, supervising the timing, and other associated logic operations;
- a speech-path network having terminals of said trunks and subscriber lines connected thereto, and adapted to selectively interconnect said terminals;
a scanner means scanning the status of said subscriber line terminals and said trunks;
a switch controller means for controlling said speech-path network;
a relay controller means for controlling said trunks;
a central controller operating on the basis of a stored program so as to alternately monitor the status of the subscriber line terminals and the status of the trunks by means of said scanner means, to temporarily halt the scanning, upon detection of any status change, for analyzing the status change thus detected, to successively execute a series of processes for realizing that stable status of the exchange system which is required by the analyzed status change, said series of processes being selected as a result of said analyzing the status change, and to resume the previously halted scanning upon completion of said series of processes; and
a memory having memory area for storing the program and different data.
0 Assignments
0 Petitions
Accused Products
Abstract
A small scale electronic telephone exchange system of stored program control type having a plurality of trunks and a central computer has been disclosed. The trunks function to process the real time operation and, therefore, the central computer does not need to operate on a real time basis. The central computer always scans the condition of the trunks and the subscriber'"'"'s telephone terminals and, upon detecting the change of said condition, it analyzes said change and performs the necessary process for said change. The present exchange system provides many new services but the cost of the system is reasonable.
-
Citations
5 Claims
-
1. A stored program type electronic exchange system for use with equipment for generating dials signals, said system comprising a pluraltiy of trunks, including at least an originating register trunk and an outgoing sender trunk for converting the dial signals between serial pulse signals and parallel character signals and communicating with a programmed computer, character by character, the rest of said trunks fulfilling various compound functions including counting, storing, supervising the timing, and other associated logic operations;
- a speech-path network having terminals of said trunks and subscriber lines connected thereto, and adapted to selectively interconnect said terminals;
a scanner means scanning the status of said subscriber line terminals and said trunks;
a switch controller means for controlling said speech-path network;
a relay controller means for controlling said trunks;
a central controller operating on the basis of a stored program so as to alternately monitor the status of the subscriber line terminals and the status of the trunks by means of said scanner means, to temporarily halt the scanning, upon detection of any status change, for analyzing the status change thus detected, to successively execute a series of processes for realizing that stable status of the exchange system which is required by the analyzed status change, said series of processes being selected as a result of said analyzing the status change, and to resume the previously halted scanning upon completion of said series of processes; and
a memory having memory area for storing the program and different data. - View Dependent Claims (2, 3, 4, 5)
- a speech-path network having terminals of said trunks and subscriber lines connected thereto, and adapted to selectively interconnect said terminals;
Specification