Darrell H Fongson

US Patent:

7088804, Aug 8, 2006

Filed:

Aug 3, 2004

Appl. No.:

10/909834

Inventors:

Srivatsan Kasturi - Saratoga CA, US
Vinod Nagarajan - Saratoga CA, US
Rajah Kalipatnapu - San Jose CA, US
Darrell Fongson - Saratoga CA, US

Assignee:

Comdial Corporation - Sarasota FL

International Classification:

H04M 11/00

US Classification:

379 9327, 379 9326, 341173, 341 50

Abstract:

Systems, methods, protocols and apparatus for information exchange and synchronization using DTMF signaling over telephone communication channels are provided. Information is packetized and converted from one format, e. g. , ASCII formatted data, to another format, e. g. , BCD formatted data. The information is wrapped in one or more packets by a sending apparatus, each packet including one or more headers, such as a Name and Length field that identify the information being exchanged and the amount of data included in the packet payload/value field. The data in the packets are converted from BCD to DTMF signals and are transmitted over a telephone communication line to a receiving apparatus. The receiving apparatus converts the DTMF signals back to BCD formatted data and processes the packets to obtain the information contained therein.

US Patent:

8098801, Jan 17, 2012

Filed:

Aug 7, 2006

Appl. No.:

11/499908

Inventors:

Srivatsan Kasturi - Saratoga CA, US
G. Alagiri - San Jose CA, US
Vinod Nagarajan - Saratoga CA, US
Rajah Kalipatnapu - San Jose CA, US
Darrell Fongson - Saratoga CA, US

Assignee:

Vertical Communications Acquisition Corp. - Sarasota FL

International Classification:

H04M 11/00

US Classification:

379 9327, 379 9326

Abstract:

Systems, methods, protocols and apparatus for information exchange and synchronization using DTMF signaling over telephone communication channels are provided. Information is packetized and converted from one format, e. g. , ASCII formatted data, to another format, e. g. , BCD formatted data. The information is wrapped in one or more packets by a sending apparatus, each packet including one or more headers, such as a Name and Length field that identify the information being exchanged and the amount of data included in the packet payload/value field. The data in the packets are converted from BCD to DTMF signals and are transmitted over a telephone communication line to a receiving apparatus. The receiving apparatus converts the DTMF signals back to BCD formatted data and processes the packets to obtain the information contained therein.

US Patent:

20120142333, Jun 7, 2012

Filed:

Dec 20, 2011

Appl. No.:

13/331989

Inventors:

Srivatsan KASTURI - Saratoga CA, US
G. Alagiri - San Jose CA, US
Vinod Nagarajan - Saratoga CA, US
Rajah Kalipatnapu - San Jose CA, US
Darrell Fongson - Saratoga CA, US

International Classification:

H04W 4/00

US Classification:

4554221

Abstract:

Systems, methods, protocols and apparatus for information exchange and synchronization using DTMF signaling over telephone communication channels are provided. Information is packetized and converted from one format, e.g., ASCII formatted data, to another format, e.g., BCD formatted data. The information is wrapped in one or more packets by a sending apparatus, each packet including one or more headers, such as a Name and Length field that identify the information being exchanged and the amount of data included in the packet payload/value field. The data in the packets are converted from BCD to DTMF signals and are transmitted over a telephone communication line to a receiving apparatus. The receiving apparatus converts the DTMF signals back to BCD formatted data and processes the packets to obtain the information contained therein.

US Patent:

6771751, Aug 3, 2004

Filed:

Oct 17, 2001

Appl. No.:

10/033372

Inventors:

Srivatsan Kasturi - Saratoga CA
G. Alagiri - San Jose CA
Vinod Nagarajan - Saratoga CA
Rajah Kalipatnapu - San Jose CA
Darrell Fongson - Saratoga CA

Assignee:

Comdial Corporation - Sarasota FL

International Classification:

H04M 1100

US Classification:

379 9327, 379 9326, 341173, 341 50

Abstract:

Systems, methods, protocols and apparatus for information exchange and synchronization using DTMF signaling over telephone communication channels are provided. Information is packetized and converted from one format, e. g. , ASCII formatted data, to another format, e. g. , BCD formatted data. The information is wrapped in one or more packets by a sending apparatus, each packet including one or more headers, such as a Name and Length field that identify the information being exchanged and the amount of data included in the packet payload/value field. The data in the packets are converted from BCD to DTMF signals and are transmitted over a telephone communication line to a receiving apparatus. The receiving apparatus converts the DTMF signals back to BCD formatted data and processes the packets to obtain the information contained therein.