The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1988
Filed:
Sep. 02, 1986
Kabushiki Kaisha Toshiba, Kawsaki, JP;
Abstract
A private branch exchange includes a common control module and a plurality of line/trunk modules. A plurality of line/trunk cards are contained in a respective line/trunk module and terminals of the same type, such as digital telephones or standard telephones, are connected to the respective cards. For control data transmission, the line/trunk cards of each of the line/trunk modules are coupled to the common control module via a common control data highway. Each line/trunk card includes, for terminal control, a central processor unit (CPU) and random access memory (RAM) for storing a control program in accordance with the type of terminals. To the line/trunk card is allocated an individual address and group address representing a group of line/trunk cards to which are connected terminals of the same type. With the use of the group address the common control module collectively down-loads control data and program corresponding to the type of terminals into port controllers of line/trunk cards belonging to the same group.