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:
Dec. 28, 1993
Filed:
Aug. 14, 1991
Robert Lechner, Boeheimkirchen, AT;
Tom Miller, Boca Raton, FL (US);
Siemens Aktiengesellschaft, Munich, US;
Abstract
Given simultaneous connection of the subscriber line circuits by way of a main distributor to a new switching center and to an existing or old switching center, the subscriber terminals are successively selected proceeding from the new switching center and the old switching center produces connections from a test terminal to these subscriber line circuits. A tone generator of the new switching center supplies a test code word by way of these connections that proceeds via a termination-associated test connection contact and via an external test bus to a code character receiver of the new switching center and is checked therein for coincidence with the test code word.