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. 22, 2001
Filed:
Sep. 11, 1998
Keiji Watanabe, Yamatokoriyama, JP;
Makoto Nakabayashi, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention is intended to transmit and receive desired data at low communication cost by selecting Recommendation T.30 in accordance with the estimation of line condition during the execution of procedures of Recommendations V.8 and V.34. At a calling station, when a JM signal is not detected within a CM signal transmission time t,when a phase 2 signal is not detected within a time t,after the end of V.8, when a phase 3 signal is not detected within a time t,after the end of the phase 2, when a phase 4 signal is not detected within a time t,after the end of the phase 3, when a phase 6 signal is not detected within a time t,after the end of the phase 5, or when the phase 4 signal is not detected within a time t,after the end of the phases 6 and C, it is presumed that the line condition is improper and a procedure of Recommendation T.30 is executed. At a called station, when a CJ signal is not detected within a JM signal transmission time t,when the phase 2 signal is not detected within a time t,after the end of Recommendation V.8, when the phase 3 signal is not detected within a time t,after the end of the phase 2, when the phase 4 signal is not detected within a time t,after the end of the phase 3, when the phase 6 signal is not detected within a time t,after the end of the phase 5, or when the phase 4 signal is not detected within a time t,after the end of the phases 6 and C, it is presumed that the line condition is improper, and the procedure of Recommendation T.30 is executed.