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:
Jan. 12, 1993
Filed:
Apr. 10, 1990
Hans-Jurgen Bock, Darmstadt, DE;
Herbert Dobold, Cologne, DE;
Telenorma GmbH, , DE;
Abstract
A telecommunications system operable to connect terminal devices for exchange of data has control devices (ST, GST), an accessory control device (HS), and a memory (SP). The control devices effect addressed connections via hierarchical coupling fields (KF) to which terminal devices (T, PC, VP) and/or transmission lines (VL) are coupled, each by two user channels and one signalling channel. Routine transmissions to and from a telephone apparatus (T), computer (PC) or the like are effected by connection addressing codes transmitted on the signalling channel. For special functions or transmissions, a unique code is inserted in the signalling data, which causes the control device (GST, ST) to pass the signalling data to the accessory control device (HS). The accessory control device replaces the unique code with a connection addressing code if the terminal is authorized, and returns the signalling information to the control device, where it effects the desired connection. The memory (SP) stores data not used in switching, such as 'telephone book' listings, usage data, authorizations and the like. When a transmission involves a change in redundantly stored data in the memory and in the terminal device memories, the control devices and/or terminal devices locate and update all occurrences of the data. The system connects special functions to the exchange, without interfering with basic switching functions.