1
Robert E Scott, Richard K Smith: Continuous authentication using an in-band or out-of-band side channel. AT&T Bell Laboratories, Joseph J Opalach, May 10, 1994: US05311596 (196 worldwide citation)

A re-authentication procedure between the modems of a public switched telephone network (PSTN) data connection, which is between a computer facility and a user, provides a secure method for protecting the computer facility against an active wire tap, or spoofing, by an intruder. In particular, the u ...


2
James E Dail, Chia Chang Li, Peter D Magill, Kotikalapudi Sriram: Method and apparatus enabling enhanced throughput efficiency by use of dynamically adjustable mini-slots in access protocols for shared transmission media. Lucent Technologies, Joseph J Opalach, September 14, 1999: US05953344 (162 worldwide citation)

A head-end dynamically allocates bandwidth of a communications channel as a function of the type of communications traffic. In particular, the head-end communicates to subscriber stations via a broadband cable network using an access protocol, which is modified to provide a variable number of mini-s ...


3
Mai Huong Nguyen: Reducing the complexities of the transmission control protocol for a high-speed networking environment. AT&T, Joseph J Opalach, August 15, 1995: US05442637 (144 worldwide citation)

The Transmission Control Protocol (TCP) is a connection-oriented transport layer protocol that offers a full duplex reliable virtual circuit connection between two endpoints. Each received TCP packet in an endpoint contains both control information and data. The complexity of processing this control ...


4
Mooi Choo Chuah, Girish Rai: Multi-hop point-to-point protocol. Lucent Technologies, Joseph J Opalach, Matthew J Hodulik, September 10, 2002: US06449272 (118 worldwide citation)

A virtual dial-up service is provided via multiple Internet Service Provides (ISPs). In particular, a remote user accesses the virtual dial-up service by establishing a connection to a serving ISP. The Serving ISP establishes a first tunnel to an anchor ISP. The latter establishes a tunnel to, e.g., ...


5
Robert E Scott: Dual mode cellular modem. AT&T, Joseph J Opalach, December 26, 1995: US05479480 (116 worldwide citation)

A mobile phone includes a modem, hereinafter referred to as a cellular radio modem. This cellular radio modem supports two modes of operation--an analog mode, where the cellular radio modem provides an analog signal for transmission; and a digital mode, where the cellular radio modem provides a digi ...


6
Robert William Dalton, Martin Joel Glapa, Krishna Gudapati: Local telephone service over a cable network using packet voice. Lucent Technologies, Joseph J Opalach, May 22, 2001: US06236653 (114 worldwide citation)

A cable modem supports two-way packet-switched traffic and is capable of telephony-type signaling to provide local telephone services over a two-way HFC cable network. The telephony-type signaling is transmitted using the TCP/IP protocol over an HFC distribution plant. This telephony-type signaling ...


7
Seo Weon Heo, Ivonete Markman, Jeongsoon Park, Saul Brian Gelfand: Decision feedback equalizer. Thomson Licensing, Joseph J Laks, Ronald H Kurdyla, Joseph J Opalach, September 19, 2006: US07110449 (88 worldwide citation)

A decision feedback equalizer for processing a data signal provides concurrent equalizer outputs for hard decision directed and soft decision directed modes. The joint architecture in accordance with the present invention takes advantage of the fact, herein recognized, that for each equalizer output ...


8
Bharat Tarachand Doshi, Kotikalapudi Sriram, Yung Terng Wang: Method and apparatus for selectively discarding packets. Lucent Technologies, Joseph J Opalach, April 17, 2001: US06219339 (87 worldwide citation)

In a packet voice system, discarding of a packet is performed as a function of previously discarded packets. In one embodiment, a packet voice system includes an ATM Adaptation Layer Type 2 (AAL2) and Service Specific Convergence Sublayer (SSCS) System. In this system, a transmission buffer stores A ...


9
Jin Der Wang: Developing a channel impulse response by using distortion. Lucent Technologies, Joseph J Opalach, October 13, 1998: US05822368 (78 worldwide citation)

A digital audio broadcasting (DAB) system includes a radio-frequency (RF) receiver that develops a characterization signal representative of a respective mobile communications channel as a precursor to estimating a channel impulse response. The latter is used to set coefficients of an equalizer of t ...


10
Thomas William Goeddel, Kevin K Whang: Signal processing resource allocation for internet-based telephony. Lucent Technologies, Joseph J Opalach, October 31, 2000: US06141345 (77 worldwide citation)

An access platform pools a plurality of different signal processing resources, herein represented by different types of speech-coding algorithms. The access platform is coupled to the Internet, a local-exchange-carrier (LEC), and other communications facilities such as, but not limited to, a plurali ...