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. 12, 1999
Filed:
Feb. 20, 1997
Applicant:
Inventor:
Brent Townshend, Menlo Park, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375242 ; 375285 ; 370523 ;
Abstract
A method of detecting the presence of robbed-bit signaling within the digital portion of a telephone network. A communication system includes an encoder and a decoder. The encoder has a digital connection to the digital portion of the telephone network. The digital portion of the telephone network is connected by an analog loop to the decoder. The method includes sending a predetermined pattern of PCM codewords from the encoder, through the telephone network, to the decoder. An error measurement is taken at the decoder. The presence of robbed-bit signaling is determined based upon the error measurement.