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. 09, 1990
Filed:
Jan. 25, 1988
Robert Lechner, Sankt Poelten, AT;
Hans-Werner Rudolf, Munich, DE;
Harald Stader, Munich, DE;
Norbert Wingerath, Munich, DE;
Christopher C Priest, Maidenhead, GB;
Nigel P Dyer, London, GB;
Robert K Galpin, Knutsford, GB;
Marcello Manca, Milan, IT;
Virgilio Mosca, Milan, IT;
Antonio Nicastro, Milan, IT;
Pierre Albouy, Lannion, FR;
Robert Le Gougnec, Lannion, FR;
Ramatchandirane Nadaradjane, Perros-Guirec, FR;
Siemens AG, Berlin and Munich, DE;
Abstract
A digital interface between at least two subscriber line interface circuits and a processing unit is described. The interface is configured in the form of a parallel interface. The level of an input/output register and of a control register is allocated, as needed, to the connections of the processing unit. These connections can be operated selectively as inputs or outputs. They can also be operated in two modes, depending upon which type of subscriber line interface circuit (SLIC) is connected. The connections of the last-mentioned units are partially operable as inputs or outputs and partially operable only as inputs but in the input case, selectively for various types of input signals.