Mohammed Taher Shaikh

US Patent:

7688809, Mar 30, 2010

Filed:

May 3, 2006

Appl. No.:

11/417763

Inventors:

Raghunath Dendukuri - Milpitas CA, US
Parameswaran Kumarasamy - San Jose CA, US
Mohammed Taher Shaikh - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/66

US Classification:

370352, 3703952

Abstract:

Systems and techniques to determine that a VoIP call is an inactive media call. One or more counters may be used to determine information indicative of an elapsed time since the last valid media packet sent/received. When the elapsed time exceeds a threshold time, the call is determined to be an inactive media call. The call may be designated as inactive, may be terminated, or other action may be taken based on the determination that the call is an inactive media call.

US Patent:

7764669, Jul 27, 2010

Filed:

Feb 27, 2006

Appl. No.:

11/364467

Inventors:

David Wayne Mills - Raleigh NC, US
Joseph L. Duffy - Plano TX, US
Henry L. Fourie - Los Gatos CA, US
Mohammed Taher Shaikh - Fremont CA, US
Sairam Yadlapati - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/66
H04L 12/28

US Classification:

370352, 370401

Abstract:

To provide for interoperability of Session Initiation Protocol (SIP) and H. 323 for Secure Realtime Transport Protocol session establishment, a transmit key is received in a first protocol from a first endpoint. The transmit key is mapped from the first protocol to a second protocol and sent in the second protocol to a second endpoint to establish a secure communication session between the first endpoint and the second endpoint.

US Patent:

7778180, Aug 17, 2010

Filed:

Feb 21, 2007

Appl. No.:

11/709512

Inventors:

Mohammed T. Shaikh - Fremont CA, US
Todd M. Baker - Los Altos CA, US
Sabita Jasty - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370235, 370231

Abstract:

Negotiation of RSVP reservations prior to the setup of a call, rather than negotiating reservation parameters during the call. RSVP reservation parameters are negotiated prior to ringing a device, rather than after. In some embodiments, this is achieved by including information in the initial call signaling elements. This added information allows negotiation with each device in the proposed data path to determine, prior to ringing the terminating device in the data path, whether each of the devices can support the proposed data link.

US Patent:

7796532, Sep 14, 2010

Filed:

May 31, 2006

Appl. No.:

11/444652

Inventors:

Kevin Joseph Connor - Blaine WA, US
Mohammed Taher Shaikh - Fremont CA, US
Ilya Umansky - San Jose CA, US
Radhika Padmanabhan - Saratoga CA, US
Xiaode Xu - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/26

US Classification:

370252, 370392

Abstract:

A device and method provides a means for monitoring a media segment of a Real-time Transport Protocol (RTP) media stream without interfering with end-to-end monitoring of the RTP media stream. The device includes a media segment monitor to generate segment control messages associated with a selected segment of the RTP media stream transmitted between a source endpoint and a destination endpoint in a packet network. The device further includes an interface to transmit and receive the segment control messages; and a processor to process the segment control messages, the segment control messages including call quality metrics related to the selected segment of the RTP media stream.

US Patent:

7822858, Oct 26, 2010

Filed:

Apr 26, 2006

Appl. No.:

11/411367

Inventors:

Parameswaran Kumarasamy - San Jose CA, US
Jayesh Chokshi - Cupertino CA, US
Mohammed Taher Shaikh - Fremont CA, US
Vinay Pande - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16

US Classification:

709227, 709229, 709226, 709249, 709207, 709245, 709205, 709228, 370352, 370242, 370328, 370466, 370401, 370389, 370349, 370465, 455434, 455433, 4554261, 379 8817, 379 8818

Abstract:

Techniques for providing a bulk refresh of sessions in a network are provided. A plurality of session identifiers for sessions that were created are determined. These session identifiers may be included in a bulk refresh message. The bulk refresh message is sent to a device configured to determine if sessions associated with the plurality of session identifiers are active or inactive. The device then sends a response to the refresh requestor. The response can be used to determine which sessions are active or inactive. After the determination, actions can be taken in order to clear the hanging session. For example, the session may be torn down or a BYE message may be sent to end the session on a peer device.

US Patent:

8064435, Nov 22, 2011

Filed:

Mar 1, 2007

Appl. No.:

11/681081

Inventors:

Mohammed Taher Shaikh - Fremont CA, US
Paul R. P. Chu - Saratoga CA, US
Sunila R. Ainapure - Sunnyvale CA, US
Viraj Raut - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/56
H04L 12/66
H04J 3/16
H04M 11/00
G06F 15/16

US Classification:

370352, 370401, 370467, 379 9315, 709228

Abstract:

Methods and systems for optimizing interworking between various communication protocols are provided. The method comprises establishing a communication connection between a first endpoint and a second endpoint, wherein the first endpoint communicates over a first communication protocol and wherein the second endpoint communicates over a second communication protocol; and monitoring communication between the first and second endpoints such that communication messages that are transmitted by the first endpoint over the first communication protocol can be mapped to counterpart messages to be received by the second endpoint over the second communication protocol, and communication messages that are transmitted by the second endpoint over the second communication protocol can be mapped to counterpart messages received by the first endpoint over the first communication protocol.

US Patent:

8351439, Jan 8, 2013

Filed:

May 3, 2006

Appl. No.:

11/417820

Inventors:

Paul Chu - Saratoga CA, US
Mohammed Taher Shaikh - Fremont CA, US
Parameswaran Kumarasamy - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370401, 370241

Abstract:

Techniques for determining media statistics for a communication from a first device to a second device are provided. The techniques include receiving media traffic for the communication at a network device configured to receive the media traffic from the first device. The network device is also configured to transmit the media traffic to the second device. A copy of the received media traffic is also forked to a processor. The received media traffic is sent to the second device while the forked copy of the media traffic is analyzed at the processor to generate media statistics about the media traffic.

US Patent:

8526447, Sep 3, 2013

Filed:

Mar 3, 2006

Appl. No.:

11/367662

Inventors:

Parameswaran Kumarasamy - San Jose CA, US
Mohammed Taher Shaikh - Fremont CA, US
Paul Chu - Saratoga CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/56
H04J 3/16
H04J 3/22
H04M 11/00
H04N 1/00

US Classification:

370401, 370466, 370467, 379 8813, 37910016, 358407

Abstract:

A network device has a H. 323 interface to communicate under a H. 323 standard of the International Telecommunications Union. The device also has a Session Initiation Protocol (SIP) interface. A processor converts signaling messages between H. 323 and Session Initiation Protocol to establish a fax session for communication of packetized fax signals and data.