Pankaj M Malhotra

US Patent:

6388989, May 14, 2002

Filed:

Jun 29, 1998

Appl. No.:

09/107087

Inventors:

Pankaj Malhotra - Sunnyvale CA

Assignee:

Cisco Technology - San Jose CA

International Classification:

H04J 306

US Classification:

370229, 370466, 370503, 710 25, 710 52, 710 56, 710 58, 710260, 711100, 711111, 711147

Abstract:

Provided is a method for preventing memory overrun in a data transmission system. The data transmission system includes a CPU, an HDLC controller having a receive buffer, and a memory shared between the CPU and the HDLC controller. The method includes initializing the HDLC controller by writing to the shared memory. The CPU terminates data reception at the HDLC controller by sending a data reception termination instruction to the controller. The CPU receives an acknowledgement instruction from the HDLC controller responsive to sending the data reception termination instruction. The CPU creates an empty buffer in the shared memory responsive to receiving the acknowledgement instruction from the controller. Thereafter, the CPU makes receive descriptors included in the shared memory point to the empty buffer. The HDLC controller subsequently transfers the data contained in its receive buffer to the empty buffer in shared memory.

US Patent:

6480531, Nov 12, 2002

Filed:

Oct 23, 1998

Appl. No.:

09/178448

Inventors:

Pankaj Malhotra - Sunnyvale CA

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04B 138

US Classification:

375222, 375224, 375228

Abstract:

A method and apparatus for use in a digital system having a plurality of modem devices from receiving de-multiplexed digital channels of information through a transmission link and providing data for use by computer equipment for detecting the presence of defective modem devices, the plurality of modem devices being organized into groups having a predetermined number of modem devices, testing each of the modems in each group against the remainder of the modems in that group, determining the number of tests that each of the modems within the group have passed successfully, selecting among the modems within each group, a âleaderâ modem having the highest number of pass rate and thereafter testing the remainder of the modems in that group against the chosen âleaderâ modem thereby reliably isolating defective modems from use during normal operation of the digital system.

US Patent:

6865700, Mar 8, 2005

Filed:

Jul 28, 2000

Appl. No.:

09/735291

Inventors:

Pankaj Malhotra - Sunnyvale CA, US
Michael Segal - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F011/00

US Classification:

714704, 714712, 714715

Abstract:

A digital system for Bit Error Rate Testing (BERT) of test transmission lines and/or devices and including a test equipment coupled to at least one transmission line for transferring digital information between the test equipment and a company office, a bit error generator coupled to the transmission lines for generating test patterns, a device for storing a plurality of predetermined profiles, each profile having associated therewith at least one parameter for measuring the integrity of the test equipment or the transmission lines, the parameters including one of the generated test patterns. The predetermined profiles are automatically sent through the test equipment and the transmission lines in a predetermined order thereby avoiding user interaction, the test equipment receives information responsive to the profiles sent through the transmission line, wherein the received information is verified against the information included in the profiles for determining the integrity of the test equipment or the transmission lines.

US Patent:

7200678, Apr 3, 2007

Filed:

Sep 4, 2002

Appl. No.:

10/235114

Inventors:

Sundar Bettadahalli - Sunnyvale CA, US
Pankaj Malhotra - Sunnyvale CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 15/16
H04L 12/28

US Classification:

709245, 370401, 709203

Abstract:

A method of dynamically obtaining a network address for a client includes transmitting a request for a network address. A plurality of network address offers can be received from a plurality of servers in response to the request. One of the plurality of offers can then be selected by the client using information contained in one or more of the offers. In one embodiment, a network comprises a client configured to dynamically obtain a network address from one of a plurality of servers. The client sends a discover message including a client identifier to the network. The servers receive the discover message and respond with offers including proposed network addresses. One or more of the offers further include a server identifier. The client preferably only accepts an offer containing an appropriate server identifier.

US Patent:

7426182, Sep 16, 2008

Filed:

Aug 28, 2002

Appl. No.:

10/231783

Inventors:

Jianxin Wang - Sunnyvale CA, US
Sitaram Vishnu Yaji - Karanataka state, IN
Manikandan Anantharaman Kenyan - Sunnyvale CA, US
Pankaj Malhotra - Sunnyvale CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 3/16
H04L 12/66
G06F 15/173
G06F 17/00

US Classification:

370235, 37039541, 370401, 709226, 712 28

Abstract:

A method of setting up a new call in a signal processor includes selecting a signal processor that has sufficient bandwidth to open a new channel while assuming that the new channel and any open but unestablished channels on the signal processor require more than a minimum amount of bandwidth per channel. When selecting a signal processor to hold the new channel, the method can assume, for example, that each of the open but unestablished channels will require a maximum amount of bandwidth per channel. Once a signal processor is selected, the new channel is opened in the selected signal processor and an amount of bandwidth is preallocated to that channel. However, if it is later determined that the selected signal processor cannot accommodate bandwidth requirements of the new channel, an amount of preallocated bandwidth for a channel can be immediately released and made available for use by another channel.

US Patent:

7587635, Sep 8, 2009

Filed:

Oct 4, 2004

Appl. No.:

10/959352

Inventors:

Anand M. Pandharikar - Milpitas CA, US
Pankaj Malhotra - Sunnyvale CA, US
Prashant S. Chauhan - Sunnyvale CA, US
Shyam Sundar Vaidyanathan - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

714 27, 717124

Abstract:

A method of debugging an active unit in a computer system having an active unit for routing computer connections and a standby unit configured to route computer connections in the event the active unit fails. The method comprises the standby unit receiving synchronization data from the active unit in the form of update messages; storing the received synchronization data in local storage; receiving a request for data to be used to perform debugging on the active unit; searching local storage for the requested data; if the requested data is found on the local storage then returning that data to the source of the request; if the requested data is not found on the local storage then requesting the requested data from the active unit, receiving the requested data from the active unit, and returning the received requested data to the source of the request.

US Patent:

61088013, Aug 22, 2000

Filed:

Aug 11, 1998

Appl. No.:

9/132567

Inventors:

Pankaj Malhotra - Sunnyvale CA
Michael Segal - Cupertino CA

Assignee:

Cisco Systems, Inc. - San Jose CA

International Classification:

G06F 1100

US Classification:

714704

Abstract:

A digital system for Bit Error Rate Testing (BERT) of test transmission lines and/or devices and including a test equipment coupled to at least one transmission line for transferring digital information between the test equipment and a company office, a bit error generator coupled to the transmission lines for generating test patterns, a device for storing a plurality of predetermined profiles, each profile having associated therewith at least one parameter for measuring the integrity of the test equipment or the transmission lines, the parameters including one of the generated test patterns. The predetermined profiles are automatically sent through the test equipment and the transmission lines in a predetermined order thereby avoiding user interaction, the test equipment receives information responsive to the profiles sent through the transmission line, wherein the received information is verified against the information included in the profiles for determining the integrity of the test equipment or the transmission lines.

US Patent:

20190158423, May 23, 2019

Filed:

Jan 29, 2019

Appl. No.:

16/261221

Inventors:

- Ottawa, CA
Pankaj Malhotra - Saratoga CA, US
Deepak M. Bhimasena - Bangalore, IN

Assignee:

Mitel Networks ULC - Ottawa

International Classification:

H04L 12/927
H04L 12/24
H04L 12/26
H04L 12/853

Abstract:

A hybrid unified communications (UC) cloud system includes a global UC virtual data center and a plurality of regional UC virtual data centers (VDCs). Each regional VDC includes a regional system manager that manages a set of regional UC resources. Associated endpoint devices operate in at least one respective multi-tenant regional cloud and to employ corresponding regional UC resources thereof, operating in at least one service cluster of the respective multi-tenant regional cloud, to communicate real-time media traffic with respect to the associated endpoint devices. A regional resource manager provides status information to the regional system manager, based on utilization of resources, to control scaling of the regional UC resources responsive to the status information. The global UC virtual data center includes a global system manager to manage the regional UC VDCs and coordinates orchestration of UC resources between and/or among the regional UC VDCs.