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. 25, 1998
Filed:
Jul. 23, 1997
Gadi Karmi, La Jolla, CA (US);
Barry Robbins, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
The wireless local loop system employs cellular technology to provide telephone service to fixed telephones of remote stations having otherwise conventional handsets. The remote station emulates a conventional public switched telephone network by providing an artificial dial tone from the handset of the remote station, after the handset is taken off-hook. The artificial dial tone is locally generated by the remote station. The system, however, delays providing the dial tone if the system is busy, i.e. if the system is under a load condition. To this end, the system monitors load levels and transmits signals to the remote stations indicating load conditions. A remote station, prior to granting at dial tone to the user, receives the load condition signals, determines whether the system is currently under load and, if so, defers the dial tone. Hence, if the system is under a load condition, such that no lines or frequency channels are available, the user is not presented a dial tone until a line or channel becomes available. By deferring the dial tone until a line or channel is available, the wireless local loop system more effectively emulates a PSTN.