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:
Aug. 07, 2001
Filed:
Jun. 04, 1998
Kenneth Wayne Brent, Miami, FL (US);
Michael Dwayne Chambers, Plainfield, IL (US);
Anne Yin-Fee Lee, Naperville, IL (US);
Chinmei Chen Lee, Woodbridge, IL (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Apparatus for performing a smooth by-pass of extra Vocoders in a mobile station to mobile station connection. Vocoders are used in mobile stations using digital signals to communicate with base stations. When the vocoded signals are to be transmitted over the public switched telephone network, they are normally converted into the kinds of signals such as 64 Kb per second pulse code modulation (PCM), used in the public switched network. In accordance with one preferred embodiment of this invention, when a connection is made between two mobile units, the connection is made via a separate asynchronous transfer mode (ATM) network. Arrangements are also available to switch between the ATM network and Vocoders connected to the public switched telephone network when it is necessary to transmit a PCM signal to a land based station, or other equipment. Advantageously, this arrangement allows switches between by-pass mode and non/by-pass mode to be made seamlessly without requiring a synchronous operation of that switch in the two switching systems involved in a connection, and therefore, further improves the voice quality during Vocoder by-pass because there is no disruption of the voice path when the by-pass mode is activated or deactivated.