Avinash K Vaidya, Age 71360 E Randolph St APT 2506, Chicago, IL 60601

6396910, May 28, 2002

Mar 1, 1999

09/259612

Patrick I. Lazar - Gurnee IL
Avinash K. Vaidya - Riverwoods IL
Juan Ramon Uribe - Elmhurst IL
Louis Poirier - Buffalo Grove IL
Dean Anthony Kostan - Algonquin IL
Xiaoyue Zhong - Mundelein IL
Yamel Torres - Chicago IL

Charles Industries, Ltd. - Rolling Meadows IL

H04M 1100

379 9314, 379 9308, 375222

A method and apparatus are provided for improved data transmissions on telephone links between service providers and remote clients. The method and apparatus perform the steps of receiving an analog encoded data signal and performing a high precision, synchronized analog to digital conversion while the signal is relatively close to a phone company central office switch assembly. The signal is transferred to output circuitry used to transmit signals on phone company subscriber lines. The signal is converted back to an analog signal prior to its final transmission to a subscriber client modem. In an embodiment of the invention, the high precision, synchronized analog to digital conversion is performed by a client-type modem and the output is transferred to a server-type modem which transmits the converted signal, in digital form, over a pair gain system. In an alternative embodiment, the client-type modem resides on the central office terminal side of a pair gain system and the server-type modem resides on the remote terminal side of the pair gain system.

6396911, May 28, 2002

Apr 15, 1999

09/292270

Dean Anthony Kostan - Algonquin IL
Avinash K. Vaidya - Riverwoods IL
Patrick I. Lazar - Gurnee IL
Juan Ramon Uribe - Elmhurst IL
Louis Poirier - Buffalo Grove IL
Xiaoyue Zhong - Mundelein IL
Yamel Torres - Chicago IL

Charles Industries, Ltd. - Rolling Meadows IL

H04M 1100

379 9314, 379 9308, 375222

A method and apparatus are provided for efficient improved data transmissions on telephone links between service providers and remote clients. The method and apparatus perform the steps of receiving an analog encoded data signal, selectively routed by a switch which is communicatively connected to a set of central office switch assembly codecs, and performing a high precision, synchronized analog to digital conversion while the signal is relatively close to a phone company central office switch assembly. The signal is transferred to output circuitry used to transmit signals on phone company subscriber lines. The signal is converted back to an analog signal prior to its final transmission to a subscriber client modem. In an embodiment of the invention, the high precision, synchronized analog to digital conversion is performed by a client-type modem and the output is transferred to a server-type modem which transmits the converted signal, in digital form, over a pair gain system. In an alternative embodiment, the client-type modem resides on the central office terminal side of a pair gain system and the server-type modem resides on the remote terminal side of the pair gain system.

6445787, Sep 3, 2002

Feb 2, 1999

09/243010

Avinash K. Vaidya - Riverwoods IL
Jay Biondo - Bloomingdale IL
Song Kue - Schaumburg IL

Charles Industries, Ltd. - Rolling Meadows IL

H04M 300

379243, 379229, 370278, 370431

A multi-drop digital telephone loop uses point-to-point digital communication between a series of Add/drop units and a central office terminal to route telephone traffic to customers. The loop automatically detects and signals subscriber channel conflicts and also function in an auto-assign mode for automatically assigning subscriber channels. The loop may also be deployed in conjunction with a remote terminal located at a subscribers residence or business.

7031158, Apr 18, 2006

Oct 29, 2003

10/695712

Eduardo Leon - Lisle IL, US
Walter Harwood - Streamwood IL, US
William Bond - Cary IL, US
Frank Hernandez - Schaumburg IL, US
Avinash K. Vaidya - Riverwoods IL, US

Charles Industries, Ltd. - Rolling Meadows IL

H05K 7/20

361700, 16510433, 174 151, 361690, 361703

An enclosure for electronic components is provided. The enclosure includes an electronics housing that has at least one slot for receiving one or more electronic components. The slot is defined by a plurality of walls. A heat pipe thermal management system is associated with the slot. The heat pipe system includes a heat pipe having a first portion embedded into one of the walls defining the slot for conducting heat from the wall to a second portion of the heat pipe extending out of the electronics housing. At least one cooling fin is carried by the second portion of the heat pipe such that heat from the heat pipe is conducted into the fin and the fin dissipates the heat to the ambient atmosphere outside of the electronics housing.

4630260, Dec 16, 1986

Jun 27, 1985

6/749567

Wing N. Toy - Glen Ellyn IL
Avinash K. Vaidya - Naperville IL

AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104
H04J 324

370 60

A communication method and packet switching network in which self-routing packets are communicated via multipaths through the network while maintaining the sequence of the packets. The switching network has a plurality of stages and the stages are interconnected by inter-node links. Each inter-node link comprises a pair of sublinks thus establishing multipaths through the switching network in response to the self-routing packets. Each stage has a plurality of switch nodes. A switch node is responsive to packets received on one inter-node like destined for a second inter-node link to maintain the sequence of packets as they are communicated out on the second inter-node link. Each node comprises a plurality of input circuits each individually connected to one of the incoming sublinks and a plurality of output circuits each connected to one of the outgoing inter-node links. Each output circuit has an arbiter which properly sequences the packets onto the outgoing link in response to requests for communicating packets received from the input circuits.

4670871, Jun 2, 1987

Jun 27, 1985

6/749500

Avinash K. Vaidya - Naperville IL

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 60

A communication method and packet switching network in which self-routing packets are communicated among stages of switching nodes via inter-stage links whereon data of the packets is transmitted in one direction and the packet clocking signals are transmitted in the other direction. Upon having the capability to accept a packet from one of the inter-stage links, a switch node transmits the packet clock signals to the upstream stage connect to that link indicating the present capacity to accept a packet. Furthermore, each switch node after receiving the end of a packet from an upstream stage times for a predefined amount of time before commencing the transmission of the packet clocking signals. That delay allows the transmitting switch node in the upstream stage to determine that the link and the downstream node are functioning correctly since continued transmission of the packet clock signals indicates that the packet had not been received or that downstream node had incorrectly responded to receipt of the packet. If a malfunction is detected, an error indication is transmitted to the computer controlling the switching network.

4932020, Jun 5, 1990

Nov 14, 1988

7/270725

Mark A. Pashan - Naperville IL
Avinash K. Vaidya - Naperville IL

AT&T Bell Laboratories - Murray Hill NJ

H04L 116

370 14

A packet switching arrangement in which packet retransmission is provided by the network for packets found by the network to be unusable. A packet switch node is equipped with a packet path and a control signaling path cooperating with packet address route arbitration and gating circuitry for effecting the packet retransmission. As a packet from a network input unit is passed from switch node to switch node a control signaling path through the switch nodes back to the input unit originating the packet is established. When a switch node detects an unusable packet a retransmit control signal is returned via the control signaling path to the input unit originating the packet. The input unit responds to the retransmit signal by resending the original packet. An unusable packet is blocked from further transmission in one embodiment and marked for removal at the network output ports in another embodiment. Unusable packets result from packet corruption or from packet collision within a switch node.

4630259, Dec 16, 1986

Nov 14, 1984

6/671468

Mikiel L. Larson - St. Charles IL
Wing N. Toy - Glen Ellyn IL
Avinash K. Vaidya - Naperville IL

AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 60

A self-routing packet switching network in which packets are communicated through stages of the network in response to self-contained addresses and in which a packet is discarded if a packet cannot be transferred to a subsequent stage of the network within a predefined amount of time. In addition, upon a packet being discarded, a maintenance message is transmitted over a maintenance channel to the processor controlling the network. Each network comprises stages of switching nodes which are responsive to the physical address in a packet to communicate the packet to a designated subsequent node. The nodes provide for variable packet buffering, packet address rotation techniques, and inter-node and intra-node signaling protocols. Each node comprises a timer which commences timing for a predefined amount of time upon receipt of a packet. If the timer times out, the packet is discarded and a maintenance message is transmitted to the processor controlling the network.