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. 20, 2013
Filed:
Jun. 10, 2008
Teruki Mita, Tokyo, JP;
Yoshihiro Ariyama, Tokyo, JP;
Hiroaki Harada, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A communication device transmits voice and facsimile signals in the same channel between a terminal device and a packet network. The communication device has an echo canceler and a jitter buffer. The jitter buffer has a delay recovery control function that selectively deletes data from the jitter buffer to recover from packet delays. After detecting a facsimile tone, the communication device waits to detect a certain interval of silence, then deactivates its echo canceler and delay recovery control function and switches into facsimile communication mode. If a certain interval of silence is detected during the facsimile transmission, the communication device reactivates its echo canceler and delay recovery control function and continues communicating in voice mode if the line is left connected.