Rajesh C Kumar

US Patent:

7065093, Jun 20, 2006

Filed:

May 17, 2001

Appl. No.:

09/859865

Inventors:

Rajesh Kumar - Fremont CA, US
Mohamed Saad-Eldin Mostafa - Emerald Hills CA, US
John Gwilym Ellis - Pleasanton CA, US

Assignee:

Cisco Technology, Inc - San Jose CA

International Classification:

H04L 12/28

US Classification:

370401, 3703955

Abstract:

Methods and apparatus are disclosed for end-to-end ATM calls based on the interworking of ATM SVC signaling (such as private network-network interface signaling) with A. 2630. 1 AAL2 signaling. In one network, Q. 2630. 1 AAL2 signaling in the originating access segment triggers, on proper authentication, ATM SVC signaling (e. g. , PNNI, IISP, AINI, etc. ) in the core, which triggers Q. 2630. 1 AAL2 signaling in the terminating access segment. The triggering is done at the edge-core boundary where an AAL2 switch and/or multiplexer or an ATM switch with AAL2 multiplexing/switching capabilities is located. In the access network between the ATM-AAL2 edge switch and the edge gateway, multiplexed AAL2 virtual channel connections (VCCs) are typically used. Single-CID AAL2 SVCs are typically used in the core network, and between the ATM-AAL2 edge switch and PSTN trunk gateways. The binding of voice calls to ATM bearer channels is done at the edge gateway when triggered by a call agent.

US Patent:

7079488, Jul 18, 2006

Filed:

Mar 17, 2001

Appl. No.:

09/811195

Inventors:

Rajesh Kumar - Fremont CA, US
Snehal Karia - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/26

US Classification:

370236, 370252, 370410

Abstract:

Methods and apparatus are disclosed for changing the bandwidth or other traffic characteristic of an established packet call in response to an identification of the requirements of the call. In one implementation, an integrated access device (“IAD”) is used to connect one or more devices to a packet network. When a device goes off-hook, a call is established through the packet network with an initial bandwidth, such as that which will support a compressed and silence suppressed voice call. The IAD monitors the received signal to determine whether a type of traffic is detected which requires a different call characterization. A request may be made to modify the traffic characterization of the established call to match the detected call characterization. In an ATM network, Q. 9231. x may be used to request a change in the bandwidth of the originally established call.

US Patent:

7085279, Aug 1, 2006

Filed:

Dec 29, 2000

Appl. No.:

09/752075

Inventors:

Rajesh Kumar - Fremont CA, US
Snehal Karia - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370401, 370352, 3703955, 370496, 379229

Abstract:

A method that sends ATM source identification and an ATM-TDM correlation tag from an ATM source gateway to a telephony signaling control network; and then receives at an ATM destination gateway the ATM source identification and the ATM-TDM correlation tag as sent from the telephony signaling control network; and then sends the ATM-TDM correlation tag from the ATM destination gateway to the ATM source gateway to establish a connection between the ATM destination gateway and the ATM source gateway.

US Patent:

7283533, Oct 16, 2007

Filed:

Jun 25, 2001

Appl. No.:

09/892117

Inventors:

Rajesh Kumar - Fremont CA, US
David Hughes - Palo Alto CA, US
Mohammed Mostafa - Emerald Hills CA, US
John Ellis - Pleasanton CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04J 3/16

US Classification:

37039552, 370466

Abstract:

A method for directly converting packet-based voice data of two non-compatible formats, (e. g. , VoIP and VOATM), is described. A VoIP call agent sets a connection between a VoIP edge gateway and an interworking unit (IWU). The IWU allows the VoATM network to appear as a TDM network to the VoIP call agent. The VoIP call agent selects a virtual trunk group and channel identification code through the interworking unit and transmits the selection to a VoATM call agent. The IWU allows the VoIP network to appear as a TDM network to the VoATM call agent such that the VoATM call agent establishes a connection between the virtual trunk group and a VoATM network device. The IWU allows the VoATM network to appear as a TDM network to the VoIP call agent such that the VoIP call agent establishes a connection between the virtual trunk group and a VoIP network device.

US Patent:

7477638, Jan 13, 2009

Filed:

Jul 3, 2001

Appl. No.:

09/899630

Inventors:

Rajesh Kumar - Fremont CA, US
Mohamed Saad-Eldin Mostafa - Emerald Hills CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/64

US Classification:

370356, 370401, 370466

Abstract:

A method for converting packet-based voice data of a first format directly to packet-based voice data of a second format, and vice versa. Data from networks using non-compatible packet-based voice technologies, for example, VoATM and VoIP, are interworked for direct conversion. Connection is set between an edge gateway of a first voice packet network, having data in a first format, and an interworking unit (IWU). Another connection is set between this IWU and an edge gateway of a second voice packet network, having data in the second format. The IWU is controlled by a single call agent that co-ordinates the conversion, at the IWU, between the two packet formats. Because it has this capability, this call agent is also called the “conversion server”. This call agent may be identical to the call agent used to control one or both edge gateways that use different packet based technologies.

US Patent:

7558207, Jul 7, 2009

Filed:

Jul 17, 2006

Appl. No.:

11/488118

Inventors:

Rajesh Kumar - Fremont CA, US
Snehal Karia - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/26
H04L 12/56
G06F 15/16

US Classification:

370236, 370252, 370410, 709229

Abstract:

Methods and apparatus are disclosed for changing the bandwidth or other traffic characteristic of an established packet call in response to an identification of the requirements of the call. In response to the detection of a type of call, such as a fax or modem call, ATM signaling is performed with peer signaling agent(s) located in the ATM network to increase the bandwidth of an already established portion of a call through the ATM network. This signaling typically includes sending a call modify request message and receiving a modify acknowledgement message, with these messages typically, but not limited to, conforming with a Q. 2963 signaling standard.

US Patent:

7606149, Oct 20, 2009

Filed:

Apr 19, 2006

Appl. No.:

11/379312

Inventors:

Rajesh Kumar - Palo Alto CA, US
Randall P. J. Ethier - Burke VA, US
Chelliah Sivachelvan - Carrollton TX, US
Robert J. Biskner - Santa Barbara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G01R 31/08
H04J 1/16
H04L 1/00

US Classification:

370229, 3702362, 3702411, 370252, 370325, 370353, 370354, 370355, 370356, 370468, 370230, 370231, 370235, 4554521, 455453, 455518, 455519, 455520

Abstract:

A method for alert throttling in media quality monitoring, includes monitoring a plurality of active communication sessions. Each active communication session is between at least two endpoints. The method also includes detecting at least one quality-impacted communication session out of the plurality of active communication sessions. The method also includes generating a first alert for each detected quality-impacted communication session out of the plurality of active communication sessions until a first throttling number of quality-impacted communication sessions is detected out of the plurality of active communication sessions. Upon detecting the first throttling number of quality-impacted communication sessions, the method includes generating a second alert for each group of additional second number of quality-impacted communication sessions detected out of the plurality of active communication sessions.

US Patent:

7660317, Feb 9, 2010

Filed:

Jun 20, 2006

Appl. No.:

11/472045

Inventors:

Rajesh Kumar - Fremont CA, US
Mohamed Saad-Eldin Mostafa - Emerald Hills CA, US
John Gwilym Ellis - Pleasanton CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370401, 3703955, 37039551

Abstract:

Disclosed are, inter alia, methods, apparatus, data structures, computer-readable media, mechanisms, and means for establishing a call across a network. For example, the network may include a first edge switch, a second edge switch, and an ATM core network coupled to the first and the second edge switches and configured to allow the second edge switch to communicate with the first edge switch. The second edge switch, being responsive to a received Q. 2630. 1 AAL2 message, is configured to send a first Private Network-Network Interface (PNNI) setup message to the first edge switch as part of establishing a call between or through one or more of the first and the second edge switches.