| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 12/05/2001 | CN1325588A Method and system for distribution of wireless signals for increased wireless coverage using the power lines |
| 11/28/2001 | EP0615674B1 Network echo canceller |
| 11/22/2001 | WO2001089184A1 Noise-adaptive communications signal gain |
| 11/22/2001 | US20010043701 Method and apparatus for echo control in a communication system |
| 11/21/2001 | EP1155561A1 Method and device for suppressing noise in telephone devices |
| 11/21/2001 | EP0922273B1 Patient/nurse communication method |
| 11/15/2001 | US20010040963 Noise reduction circuit for telephones |
| 11/14/2001 | CN1322427A Methods and apparatus for mitigating efects of microphone overload in echo cancelation systems |
| 11/07/2001 | EP1152547A2 Network echo canceller |
| 11/07/2001 | EP0895688A4 Apparatus and method for non-linear processing in a communication system |
| 11/06/2001 | CA2234738C Method and apparatus for cancelling multi-channel echo |
| 10/31/2001 | EP0811288B1 Apparatus and method for cancelling acoustic echoes including non-linear distortions in loudspeaker telephones |
| 10/31/2001 | DE10020918A1 Calling indicator for house doorbell system has LED indicators for showing which of two contact switches has been operated |
| 10/30/2001 | US6311071 Low-feedback compact wireless telephone |
| 10/30/2001 | US6311052 PTT radio system |
| 10/25/2001 | WO2001080595A1 Telephone communication system over a single telephone line |
| 10/25/2001 | WO2001080439A1 Desired voice detection in echo suppression |
| 10/25/2001 | US20010033649 Speakerphone accessory for a telephone instrument |
| 10/25/2001 | US20010033565 Scheduled internet protocol telephone instrument system |
| 10/25/2001 | CA2406681A1 Telephone communication system over a single telephone line |
| 10/18/2001 | US20010032334 Ingress protection in a communication system with orthogonal carriers |
| 10/18/2001 | US20010031048 Method and system for data communication |
| 10/16/2001 | US6304654 Telephone handset interface with feedback control |
| 10/11/2001 | US20010028708 Digital key telephone system and extension terminal device thereof |
| 10/10/2001 | EP1142288A1 Methods and apparatus for adaptive signal gain control in communications systems |
| 10/10/2001 | CN1317194A Digital adaptive filter and acoustic echo canceller using the same |
| 10/09/2001 | US6301491 Device and method for radio terminal with hands-free function |
| 10/09/2001 | US6301364 Tagging echoes with low frequency noise |
| 10/09/2001 | US6301357 AC-center clipper for noise and echo suppression in a communications system |
| 10/04/2001 | WO2001022601A3 Echo cancelling process with improved phase control |
| 10/04/2001 | US20010026611 Digital key telephone system and extension terminal device thereof |
| 10/04/2001 | DE10016066A1 Entry telephone diversion system contacts work or mobile number improves security and communication |
| 10/02/2001 | CA2246260C Digital button telephone system and extension terminal for the same |
| 09/27/2001 | US20010024494 Digital key telephone system and extension terminal device thereof |
| 09/27/2001 | US20010024493 Digital key telephone system and extension terminal device thereof |
| 09/27/2001 | US20010024492 Digital key telephone system and extension terminal device thereof |
| 09/25/2001 | US6295364 Simplified communication system |
| 09/20/2001 | WO2001069371A2 Computer appliance comprising a multiway acoustic output and input system |
| 09/20/2001 | DE10011615A1 Door entry unit equipment box has detachable cover matches components is attractive |
| 09/20/2001 | DE10011303A1 Intercom system for apartments, has interface that connects with three different signal transmission devices which transmit signal between door and apartment stations |
| 09/19/2001 | EP1133865A1 Method and system for distribution of wireless signals for increased wireless coverage using the power lines |
| 09/18/2001 | US6292651 Communication system with multicarrier transport distribution network between a head end terminal and remote units |
| 09/13/2001 | US20010021250 Method and device for echo cancelling |
| 09/05/2001 | EP1129526A1 Methods and apparatus for providing echo suppression using frequency domain nonlinear processing |
| 08/30/2001 | WO2001013615A3 Method and device for transmitting voice signals in a building |
| 08/29/2001 | CN1310909A Outgoing telephone line preselection based on dialed number |
| 08/28/2001 | US6282683 Communication system with multicarrier telephony transport |
| 08/28/2001 | US6282176 Full-duplex speakerphone circuit including a supplementary echo suppressor |
| 08/23/2001 | US20010016783 Method and apparatus for active latency characterization |
| 08/23/2001 | US20010016041 Echo canceller employing dual-h architecture having split adaptive gain settings |
| 08/22/2001 | EP1126501A1 Cathode ray tube and method of displaying pictures |
| 08/22/2001 | CN1309414A Cathode-ray tube and method for displaying picture |
| 08/21/2001 | US6279158 Dynamic bandwidth allocation |
| 08/21/2001 | US6278785 Echo cancelling process with improved phase control |
| 08/16/2001 | WO2001060029A1 Speakerphone accessory for a telephone instrument |
| 08/16/2001 | WO2001059994A1 Scheduled internet protocol telephone instrument system |
| 08/15/2001 | CN1308452A 频分复用总线电话系统 Frequency division multiplex telephone system bus |
| 08/15/2001 | CN1069804C Personal base station for selecting route for from/to portable unit |
| 08/14/2001 | US6275990 Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith |
| 08/14/2001 | US6275474 Private digital communication apparatus for interconnecting a plurality of elements |
| 08/14/2001 | CA2200672C Two-wire conference apparatus with echo canceler without training |
| 08/09/2001 | WO2000076081A3 Methods and apparatus for improved sub-band adaptive filtering in echo cancellation systems |
| 08/07/2001 | CA2174159C Acoustic echo canceler |
| 08/07/2001 | CA2162538C Echo cancelling system suitable for voice conference |
| 08/07/2001 | CA2162413C Optimization of adaptive filter tap settings for subband acoustic echo cancelers in teleconferencing |
| 08/02/2001 | WO2001056263A1 Improved system and method for implementation of an echo canceller |
| 08/02/2001 | WO2000060830A3 Mobile telephone |
| 07/31/2001 | US6269161 System and method for near-end talker detection by spectrum analysis |
| 07/26/2001 | WO2001054296A1 Sound communication device and echo processor |
| 07/26/2001 | DE10012868C1 Computer with multi-way acoustic input/output system for echo cancelling in telephony |
| 07/25/2001 | EP1119172A2 Network echo canceller |
| 07/24/2001 | US6266540 Control interface protocol for telephone sets for a satellite telephone system |
| 07/24/2001 | US6266409 Echo canceller employing dual-H architecture having improved double-talk detection |
| 07/24/2001 | US6266408 Echo controlling apparatus of video conferencing system and control method using the same |
| 07/19/2001 | WO2001003413A3 Interphone apparatus with connection to a cellular telephone |
| 07/19/2001 | WO2001002929A3 Coded domain noise control |
| 07/19/2001 | US20010008534 Digital subscriber line multiplexer |
| 07/18/2001 | EP0839428A4 Reconfigurable on-demand telephone and data line system |
| 07/17/2001 | US6263078 Acoustic echo canceller with fast volume control compensation |
| 07/17/2001 | US6263061 Digital button telephone system and extension terminal for the same |
| 07/12/2001 | WO2001050714A1 Band-by-band full duplex communication |
| 07/12/2001 | WO2000070853A3 Volume control for a communications device including an echo canceller |
| 07/11/2001 | EP1115215A2 Method and system for data communication |
| 07/10/2001 | US6259905 Method and apparatus to minimize dialing and connecting delays in a wireless local loop system |
| 07/05/2001 | WO2001001665A3 Host-based speaker phone |
| 07/05/2001 | WO2000076176A3 Loudspeaker volume range control |
| 07/05/2001 | WO2000072564A3 Echo compensation device |
| 07/03/2001 | US6256384 Method and apparatus for cancelling echo originating from a mobile terminal |
| 06/28/2001 | US20010005377 Control interface protocol for telephone sets for a satellite telephone system |
| 06/28/2001 | DE10001048C1 Door station for intercom system has module housings of identical cross-section that can be placed in sequence; sides without side parts are closed by terminating parts, one forming cover |
| 06/27/2001 | CN1301449A Telephone line interface circuit with AC and DC line adjustment |
| 06/21/2001 | WO2001045375A1 Real time processing and management method for canceling out the echo between a loudspeaker and a microphone of a computer terminal |
| 06/20/2001 | EP1109154A2 Linear predictive coding based acoustic echo cancellation |
| 06/20/2001 | CN2435820Y Network speech device with function of far-end starting computer mainframe |
| 06/20/2001 | CN1300498A A method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors |
| 06/19/2001 | US6249581 Spectrum-based adaptive canceller of acoustic echoes arising in hands-free audio |
| 06/14/2001 | WO2001043413A1 Echo canceller in a communication system at a terminal |
| 06/14/2001 | CA2394370A1 Echo canceller in a communication system at a terminal |
| 06/13/2001 | EP1107464A1 Method and device for echo cancelling |
| 06/12/2001 | US6246760 Subband echo cancellation method for multichannel audio teleconference and echo canceller using the same |