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. 24, 1984
Filed:
Mar. 09, 1982
Alain Forestier, Lannion, FR;
Abstract
This test system is intended to test subscriber line interface circuits (1), (2), . . . etc. which are connected by means of one end to subscriber lines and by means of the other end are put in connection with a test apparatus (107). Change-over means (26), (27) or (76), (77) are provided to disconnect each interface circuit such as the interface circuit (1) or the interface circuit (2) from its subscriber line and to connect it to a test bus (112), (113) which is common to one group of interface circuits. Control means are provided in the test appartus (107) for connecting, depending on the test to be effected, one interface circuit or two interface circuits to the test bus. This test system allows remote testing of interface circuits, for example from a telephone exchange by using only the normally existing links between this exchange and the interface circuits.