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:
Oct. 04, 1994
Filed:
Apr. 20, 1992
Jin-Su Jung, Kumi, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
A method of performing a continuity check on a speech channel in an electronic exchange system includes indicating and transmitting a continuity check request on a continuity check indicator located in a head address message if characteristics of a trunk module turn out the continuity check request while handling an outgoing call to a counterpart, and connecting a speech channel with a continuity check tone transceiver to transmit therethrough a continuity check tone; monitoring whether the continuing check tone that was transmitted through a forward channel is received back through a backward channel within a predetermined time; and if said continuity check tone is received back, terminating transmission of the speech channel from the continuity check tone, causing a timer to stop counting, and disconnecting said continuity check tone transceiver.