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. 19, 2011
Filed:
Apr. 01, 2005
Frank Lin, Diamond Bar, CA (US);
Tsutomu Sakai, Cypress, CA (US);
Frank Lin, Diamond Bar, CA (US);
Tsutomu Sakai, Cypress, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A VoIP adapter module for a VoIP phone system switches the phone connection from a broadband connection to a wired connection when a power outage or a broadband disconnection is detected. The switch is accomplished by establishing a connection from a telephone connected to an RJ11 port on the module to a wired channel connected to a backup RJ11 port on the module. Detection for power outage is by comparing the device voltage with a reference voltage, and detection for broadband connection is by sending out a PING packet and waiting to see if a return packet is received.