Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 9 - Arrangements for interconnection not involving centralised switching
Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105)
11/1995
11/22/1995CN1112319A Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switches
11/21/1995US5469495 Method and apparatus for delivering secured telephone service in hybrid coaxial cable network
11/15/1995EP0682437A2 Device and method for automatically controlling sound volume in a communication apparatus
11/15/1995EP0682436A2 Voice actuated switching system
11/15/1995CN2212865Y Junctor of conversing mechanism for building
11/14/1995US5467394 Method of improving sidetone attenuation in electroacoustic systems
11/07/1995US5465292 Trading telephone
10/1995
10/31/1995US5463680 Switching arrangement for activating electrical devices
10/31/1995US5463676 Key telephone system with a voice storage equipment
10/31/1995US5463618 Echo canceller
10/27/1995CA2145703A1 A noise-controlled communication apparatus
10/17/1995US5459786 Loudspeaker telephone device comprising a novel noise suppressing circuit
10/03/1995US5455859 Telephone handset interface for device having audio input
09/1995
09/28/1995WO1995026093A1 Communication system
09/27/1995EP0674419A2 Communication system for processing caller ID information
09/27/1995EP0674418A2 Automatic call distributor with telephonic call holding system
09/27/1995EP0674415A1 Telephone having a speech band limiting function
09/27/1995EP0673588A1 Improved audio distribution system with independent audio control
09/23/1995CA2143076A1 Communication system for processing caller id information
09/13/1995EP0671099A1 A voice activity detector for an echo suppressor and an echo suppressor
09/13/1995CN1108449A System and method to identify the terminating directory number at the customer premises
09/12/1995CA2045027C Control and interface apparatus for telephone systems
09/08/1995WO1995024108A1 Process and system for automatically rendering telecommunications terminals with individual accessories addressable
09/05/1995CA2055364C Enhanced acoustic calibration procedure for a voice switched speakerphone
08/1995
08/31/1995WO1995023477A1 Doubletalk detection by means of spectral content
08/30/1995EP0627139A4 Feedback level estimator between loudspeaker and microphone.
08/29/1995US5446784 Apparatus for coupling a telephone line to a telephone line subscriber device
08/23/1995EP0668686A1 Home telephone system
08/22/1995US5444772 Telephone line lockout device
08/16/1995EP0667700A2 Echo cancelling method and apparatus using fast projection scheme
08/08/1995US5440644 Audio distribution system having programmable zoning features
08/08/1995CA2059883C Key telephone system provided with telephone sets connectable to add-on modules
08/02/1995EP0665671A2 Apparatus and method for echo attenuation
08/02/1995EP0346434B1 Automated access facilities and method for use with key telephone systems
07/1995
07/18/1995US5434912 Audio processing system for point-to-point and multipoint teleconferencing
07/18/1995US5434797 Audio communication system for a computer network
07/18/1995US5434611 Home health care system which employs a two-way community antenna television network to permit communication between a doctor and patients at different locations
07/13/1995WO1995019085A1 Echo canceller using a center clipper with threshold set according to estimated echo
07/11/1995US5432505 Cable management system with automatic mapping
07/06/1995DE4400063A1 Door intercom. system suitable for entryphone
07/05/1995EP0661832A2 Method of and apparatus for identifying a system with adaptive filter
07/04/1995US5430796 Auxiliary attenuator arrangement for use in voice-switched speakerphone and method of selectively inserting communication loss in speakerphone paths
06/1995
06/28/1995EP0660622A2 Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switches
06/28/1995EP0659319A1 Telephone adapter for telephone sets
06/27/1995US5428604 Training method for an echo canceller for use in a voice conference system
06/27/1995US5428562 For use in echo cancellation
06/24/1995CA2135264A1 Switching of balanced line-pairs in a cable management system with reduced number of crosspoint switches
06/14/1995EP0658033A2 Private branch exchange
06/14/1995EP0520067B1 Improved audio distribution system
06/13/1995US5425089 Low cost telephone caller identification device and method
06/13/1995CA2048457C Hands free telephone set
06/08/1995WO1995015643A1 Voice enhancement system and method
06/06/1995US5422936 Enhanced message service indication
05/1995
05/17/1995EP0653869A1 System and method to identify the terminating directory number at the customer premises
05/16/1995US5416829 Dual mode cellular radio communication apparatus having an echo canceller employed in both analog and digital modes
05/11/1995DE4337653A1 Method and circuit arrangement for improving the quality of voice communication in hands-free telephone facilities
05/09/1995US5414763 Apparatus and method for providing echo suppression to a plurality of telephones
05/02/1995US5412645 Distributed processing telecommunication switch with standardized switch units
04/1995
04/25/1995US5410595 Apparatus and method for noise reduction for a full-duplex speakerphone or the like
04/20/1995WO1995010927A1 Improved audio distribution system with independent audio control
04/20/1995CA2150130A1 Improved audio distribution system with independent audio control
04/19/1995EP0649241A1 Device for transmitting call and occupation state signals of multi-line telephone systems for alternate or simultaneous loud-speaking communication over a two-wire long distance line
04/19/1995EP0648397A1 Method for fail-safe operation in a speaker phone system
04/18/1995US5408530 Echo cancelling method and echo canceller using the same
04/18/1995CA2045022C Key telephone interface
04/13/1995WO1995010164A1 Microphone system for teleconferencing system
04/13/1995WO1995006382A3 A voice activity detector for an echo suppressor and an echo suppressor
04/13/1995DE4408972C1 Door station using a DECT mobile unit
04/11/1995CA2049005C Key telephone apparatus
04/04/1995US5404397 Conference system with automatic speaker detection and speaker unit
04/04/1995CA2039122C Telephone system
03/1995
03/28/1995CA2042786C Speakerphone state-controlled alerting arrangement
03/23/1995DE4407102C1 Method and arrangement for controlling an electroacoustic system having a tendency to develop acoustic feedback
03/21/1995US5400399 Speech communication apparatus equipped with echo canceller
03/15/1995EP0584299A4 Improved audio distribution system.
03/14/1995US5398281 Telephone with hands-free operation
03/09/1995WO1995006986A1 Fast converging adaptive filter
03/09/1995DE4406853C1 Method and arrangement for automatically establishing the addressability of telecommunications devices with terminal-specific ancillary devices
03/08/1995EP0642276A2 Cable management system with automatic mapping
03/08/1995EP0642251A2 Method for the automatic switching of the speech direction and circuit arrangement for implementing the method
03/08/1995EP0642248A2 Small telecommunications system, especially home telephone system
03/08/1995EP0642230A1 Speech communication system
03/08/1995EP0393059B1 Method for terminating a telephone call by voice command
03/07/1995US5396554 Multi-channel echo canceling method and apparatus
03/07/1995US5396550 Radio and land-line telephones with hands-free operation
03/03/1995CA2105409A1 Communication system for use in a mine
03/02/1995WO1995006382A2 A voice activity detector for an echo suppressor and an echo suppressor
02/1995
02/21/1995US5392334 Off-hook detection and soft line seizure for telephone line sharing in a computer system
02/16/1995WO1995005047A1 An audio processing system for teleconferencing
02/14/1995US5390250 Echo canceller with improved doubletalk detection
02/14/1995US5390244 Method and apparatus for periodic signal detection
02/14/1995US5390241 Shared line appearance across a plurality of switching systems
02/14/1995US5390177 Conferencing arrangement for compressed information signals
02/08/1995CN1027613C Circuit arrangement for controlling volume range of voice terminal
02/07/1995US5388152 Key telephone system capable of regulating volume of handset
02/07/1995US5387877 Voltage controlled attenuator for speakerphones
02/07/1995CA1334303C Digital key telephone system
02/05/1995CA2126710A1 Cable management system with automatic mapping
02/01/1995EP0636071A1 Communications device.
01/1995
01/31/1995US5386465 Audio processing system for teleconferencing with high and low transmission delays
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