| Patent Number |
Title Of Patent |
Date Issued |
| 7072344 |
Redistribution of excess bandwidth in networks for optimized performance of voice and data sessi |
July 4, 2006 |
| A packet network redistributes excess bandwidth for voice and data sessions applying a Quality of Service (QoS) algorithm. The network includes interacting client stations using H.323 protocol managing bit rate according to an algorithm as voice and data sessions are added or removed |
| 7068601 |
Codec with network congestion detection and automatic fallback: methods, systems & program produ |
June 27, 2006 |
| A codec detects congestion in a packet network and responds via a session control protocol to re-negotiate codec-type and/or parameters with the receiving codec to reduce bit rate for supporting a session. Once the connection and session are established, encoded packets start flowing |
| 7042841 |
Controlling network congestion using a biased packet discard policy for congestion control and e |
May 9, 2006 |
| A packet network congestion control system using a biased packet discard policy includes a plurality of end points having codecs operating in a framework, e.g. ITU-T H.323 protocol to establish a communication session. The protocol enables the codecs to negotiate codec type and assoc |
| 7003030 |
Receivers, methods, and computer program products for an analog modem that receives data signals |
February 21, 2006 |
| Receivers, methods, and computer program products can be used to demodulate a data signal transmitted from a digital source, which has a network sampling rate that is synchronized with a network clock. In an illustrative embodiment, a receiver includes a two-stage interpolator that r |
| 6967995 |
Methods, systems and computer program products for carrier drop detection using a variable thres |
November 22, 2005 |
| Methods, systems and computer program products are provided which utilize a variable threshold for carrier drop detection. The carrier drop detection threshold is updated based on a recognized data sequence contained within the signal received by the modem. The received signal is demodul |
| 6940864 |
Network access traffic sorter |
September 6, 2005 |
| Packetized voice, video, and data traffic (data frames) are received in a communication traffic sorter. The data frames have a dispatch priority corresponding to their transmission characteristics (flow) and a quality of service parameters. The communication traffic sorter analyzes i |
| 6889346 |
Scoping of real time signals of remote communication systems over a computer network: systems, m |
May 3, 2005 |
| A remote controller is coupled to a target system via a computer network A real time probe is installed in software executing on a target system, typically a Digital Signal Processor (DSP). The remote controller includes a "debugger user interface" which accepts and interprets scoping co |
| 6839382 |
System, methods and computer program products for identifying digital impairments in modem signa |
January 4, 2005 |
| Digital impairments, including Robbed Bit Signaling (RBS) and impairments due to digital attenuation PAD (Packet Assembler/Disassembler) devices, may be identified in sets of Pulse Code Modulation (PCM) signal levels, such as sets of Digital Impairment Learning (DIL) signals transmitted |
| 6823004 |
Methods, systems and computer program products for monitoring performance of a modem during a co |
November 23, 2004 |
| Methods, systems and computer program products are provided for monitoring performance of a modem which obtain diagnostic data directly from memory associated with the modem's digital signal processor (DSP). A secondary path to the DSP memory is utilized for the monitoring operations so |
| 6816545 |
Systems, methods and computer program products for identifying digital impairments in modems bas |
November 9, 2004 |
| Digital impairments in a set of Pulse Code Modulation (PCM) signal levels that are received at a client modem from a server modem are identified by compressing the set of PCM signal levels into a signature. Digital impairments are determined based on the signature. In a preferred emb |
| 6765955 |
Methods, systems and computer program products establishing a communication configuration for a |
July 20, 2004 |
| Methods, systems and computer program products for configuring a modem communication session when conditions associated with echo noise on a digitally discontinuous channel are detected are provided. The condition is detected at the local modem by reference to the local modem's respe |
| 6757325 |
Methods, modems and computer program products for identification of a modem type and adjustment |
June 29, 2004 |
| Methods, modems and computer program products for detecting whether a remote modem is of a particular design type and for adjusting the communication configuration for a communication session based on a type of the remote modem. The modem type is recognized based on a knowledge that |
| 6754258 |
Systems, methods and computer program products for averaging learned levels in the presence of d |
June 22, 2004 |
| Methods, systems and computer program products for averaging measured levels from differing frame intervals based on a digital impairment pattern associated with the frame intervals are provided. Measured levels from frame intervals with the same digital impairment pattern may be ave |
| 6701389 |
Bandwidth allocation in accordance with shared queue output limit |
March 2, 2004 |
| A method for dynamically adjusting the flow rate of a plurality of logical pipes that share a common output queue. In accordance with the method of the present invention, a minimum flow rate and a maximum flow rate are set for each of the pipes. Next a determination is made of whether or |
| 6665336 |
MODEMS, METHODS, AND COMPUTER PROGRAM PRODUCTS FOR SELECTING AN OPTIMUM DATA RATE USING ERROR SI |
December 16, 2003 |
| Modems, methods, and computer program products select a data rate based on error signals in a modem. In an illustrative embodiment, error signals representing the difference between an output of an equalizer and an output of a detector are accumulated and an average error value is co |
| 6662322 |
Systems, methods, and computer program products for controlling the error rate in a communicatio |
December 9, 2003 |
| Error rate control systems, methods, and computer program products request a data rate slow-down based on the status of the error rate. A linear penalty is generated if a data rate slow-down is requested, which is then used to determine a minimum distance between constellation points in |
| 6661837 |
MODEMS, METHODS, AND COMPUTER PROGRAM PRODUCTS FOR SELECTING AN OPTIMUM DATA RATE USING ERROR SI |
December 9, 2003 |
| Modems, methods, and computer program products select a data rate based on error signals in a modem. In an illustrative embodiment, error signals representing the difference between an output of an equalizer and an output of a detector are accumulated and an average error value is co |
| 6650657 |
Systems, methods and computer program products for identifying digital impairments in modem sign |
November 18, 2003 |
| Robbed Bit Signaling (RBS) and PAD digital impairments in sets of Digital Impairment Learning (DIL) signals that are repeatedly transmitted from a server modem to a client modem during DIL intervals are identified by identifying a PAD level for the sets of DIL signals in the DIL interval |
| 6487243 |
Modems, methods, and computer program products for recovering from errors in a tone reversal seq |
November 26, 2002 |
| Modems, methods, and computer program products for recovering from errors during a tone reversal sequence between a modem pair detect a false tone reversal during a tone reversal sequence at a first modem. If a false tone reversal is detected, then the first modem requests that a second |
| 6381267 |
Modems, methods, and computer program products for falling back to a lower data rate protocol up |
April 30, 2002 |
| Modems, methods, and computer program products for falling back to a low speed mode of operation upon detection of abnormal line conditions during startup perform a first phase of a multiphase startup procedure in accordance with a high speed mode of operation. A determination is then |
| 6341360 |
Decision feedback equalizers, methods, and computer program products for detecting severe error |
January 22, 2002 |
| Decision feedback equalizers having a stabilization capability, and methods and computer program products for stabilizing a decision feedback equalizer under severe error conditions use output samples from an equalizer to determine whether a severe error event has occurred in accorda |
