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:
May. 31, 1994
Filed:
Feb. 27, 1992
Abraham Y Chen, Mountain View, CA (US);
Areanex Technology, Inc., Cupertino, CA (US);
Abstract
An Improved Local Switching System provides a full set of business telephone functions for at least two main switch telephone lines and a number of local stations. A Master Switching Unit (MSU) serves outgoing, incoming and local call requests and maintains stable talking connections. A call router (ACR) monitors one of the main switch lines for incoming calls, refers call requests to the MSU, accepts responsibility for transferring MSU stable talking connections to the call router; and handles outgoing calls when the MSU is not available to serve-an call origination request. A transfer switch, under control of the call router, transfers the main switch lines between the MSU and the call router.