Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 5 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
Patents for H04Q 5 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange (6,717)
09/1998
09/16/1998EP0864235A2 Apparatus and method in support of completing two calls using analog interface to telephone network
09/16/1998EP0569453B1 Method for signalling/communication within an entrance telephone system and an entrance telephone system communicating according to the method
08/1998
08/07/1998CA2228903A1 Telephone switching system for easily implementing modification of connection information and medium storing telephone system control program
07/1998
07/22/1998EP0854623A1 Device for limiting access in a telephone handset
07/22/1998CN1188383A PHS terminal device and data collection system using the same
07/17/1998CA2227189A1 Access restriction device for a telephone set
05/1998
05/07/1998WO1997042773A3 Apparatus and method in support of completing two calls using analog interface to telephone network
04/1998
04/14/1998US5739760 Method and system for remote supervisory control
04/01/1998CN2277611Y Telephone line stretcher
03/1998
03/24/1998US5732070 Communication control apparatus
03/11/1998EP0667084B1 Information transmission system
02/1998
02/17/1998US5719855 Digital telephone switching system having plural terminal devices directly connected to a common digital line
01/1998
01/07/1998EP0815622A1 Cross-connect method and apparatus
12/1997
12/23/1997CA2115733C System and method to identify the terminating directory number at the customer premises
11/1997
11/13/1997WO1997042773A2 Apparatus and method in support of completing two calls using analog interface to telephone network
11/13/1997CA2240906A1 Apparatus and method in support of completing two calls using analog interface to telephone network
11/12/1997CN2267589Y Cord less exchange telephone set
06/1997
06/05/1997WO1997014242A3 Method for optimizing the use of urban telephone lines
05/1997
05/13/1997US5629931 Information transmission system
04/1997
04/17/1997WO1997014242A2 Method for optimizing the use of urban telephone lines
04/17/1997CA2207055A1 Method for optimizing the use of urban telephone lines
04/16/1997CN2252466Y Building anti-theft time-limit secret multi-household selective intercom
02/1997
02/05/1997EP0715773A4 Cross-connect system
09/1996
09/26/1996WO1996029764A1 Cross-connect method and apparatus
09/26/1996CA2214890A1 Cross-connect method and apparatus
08/1996
08/27/1996US5550822 Private branch exchange
08/06/1996US5544235 In a telecommunications network
06/1996
06/12/1996EP0715773A1 Cross-connect system
06/04/1996US5524010 Communication system, network terminal unit to be used in a communication system and terminal to be connected to a communication system
03/1996
03/14/1996WO1996008103A1 Method and device for multilingual telecommunications
02/1996
02/20/1996CA2040327C Isdn (intergrated services digital network) interface circuit and system using the same
01/1996
01/04/1996DE4435034C1 Telecommunications circuitry for party line
12/1995
12/20/1995CN1113624A Communication system, network terminal unit to be used in a communication system and terminal to be connected to a communication system
12/06/1995CN1113063A Digital transmiting means
11/1995
11/14/1995US5467386 Method for signalling/communication within an entrance telephone system and an entrance telephone system communicating according to the method
11/14/1995US5467079 Incoming message processing method in plurality of terminal equipments and terminal equipment executing said method
10/1995
10/10/1995US5456608 Cross-connect system
09/1995
09/26/1995CA2065248C Digital communication system for integrated services telephone installations
09/13/1995CN1108449A System and method to identify the terminating directory number at the customer premises
08/1995
08/23/1995EP0668686A1 Home telephone system
08/16/1995EP0667084A1 Information transmission system
07/1995
07/05/1995EP0661901A1 ISDN Local communication system
05/1995
05/17/1995EP0653869A1 System and method to identify the terminating directory number at the customer premises
04/1995
04/04/1995US5404491 Subscriber module for connection to a plurality of subscriber terminals and to an integrated services digital communication network (ISDN)
03/1995
03/14/1995US5398246 ISDN private local switching system
03/07/1995US5396394 ISDN device line protection circuit
03/02/1995WO1995006344A1 Cross-connect system
03/02/1995CA2169563A1 Cross-connect system
11/1994
11/29/1994US5369636 Multiple communication speed converting apparatus
05/1994
05/11/1994WO1994010809A1 Information transmission system
05/10/1994US5311518 ISDN interface circuit and system using the same
03/1994
03/10/1994DE4228407A1 Establishing telephone party line subscriber connection - adjusting reception amplification at each end of connection to provide damping compensation
11/1993
11/18/1993EP0569453A1 Method fro signalling/communication within an entrance telephone system and an entrance telephone system communicating according to the method
11/18/1993DE4216265A1 Telecommunication signal transmission system - transmits signals between several subscribers terminals and central telephone exchange in both directions
11/16/1993CA1324448C Microcomputer integrating a digital subscriber terminal for an integrated service digital network
10/1993
10/12/1993US5253289 In accordance with ringing signal sequences sent through telephone line
09/1993
09/21/1993US5247570 Telephone answering system and apparatus for direct caller selection of a party line extension
07/1993
07/06/1993CA1320002C Management system capable of quickly assigning a terminal endpoint identifier to a terminal equipment unit
01/1993
01/13/1993EP0522895A1 Communication control apparatus
12/1992
12/16/1992EP0289526B1 Adaptive threshold sampling method
11/1992
11/05/1992DE4114702C1 Operating circuit for telephone party line - has respective call recognition units and identifies caller from direction of loop current
10/1992
10/20/1992CA1309195C Isdn network termination unit enabling to establish data link between one terminal equipment and other terminal equipments connected to the unit without use of subscriber line
10/13/1992CA1308824C Party line converter
08/1992
08/25/1992US5142569 Apparatus for selectively enabling subscriber device to respond to ringing signal in dependence upon ringing cadence
08/25/1992US5142525 Communication terminal apparatus
08/18/1992US5140630 Added main line apparatus
08/06/1992WO1992013418A1 Method fro signalling/communication within an entrance telephone system and an entrance telephone system communicating according to the method
08/06/1992CA2101080A1 Method for signalling/communication within an entrance telephone system and an entrance telephone system communicating according to the method
06/1992
06/23/1992US5125082 Management system capable of quickly assigning a terminal endpoint identifier to a terminal equipment unit
06/02/1992US5119418 Telephone system with several terminals on a single line
04/1992
04/14/1992US5105422 Circuit arrangement for information transmission
03/1992
03/24/1992US5099511 Exchange system for incoming calls from direct-in lines
02/1992
02/04/1992US5086458 Telephone answering system and apparatus for direct caller selection of a party line extension
01/1992
01/15/1992EP0466590A1 Digital communication system for an integrated services telephone installation
01/11/1992WO1992001347A1 Digital communication system for integrated services telephone installations
12/1991
12/18/1991CN1015141B Non-cord telephonic system
11/1991
11/27/1991EP0458710A1 Telephone system with a plurality of telephone terminals on a single line
09/1991
09/17/1991US5050005 Facsimile apparatus
08/1991
08/27/1991CA1288153C Response system of a terminal to an incoming call
08/14/1991EP0441734A2 Line protection circuit for an integrated services digital network
08/13/1991US5040209 Telephone ringing monitoring and control system
05/1991
05/07/1991US5014269 Microcomputer integrating a digital subscriber terminal for an integrated service digital network
03/1991
03/12/1991US4999836 ISDN network termination unit enabling to establish data link between one terminal equipment and other terminal equipments connected to the unit without use of subscriber line
03/06/1991EP0256027B1 Method for the simultaneous operation of several terminal equipments on one network termination unit of a broadband network
03/05/1991US4998273 Telephone line called number recognizer
01/1991
01/16/1991EP0408024A2 Universal ISDN subscriber line connection group
12/1990
12/04/1990US4975900 Response delay system of an ISDN terminal in a point to multipoint configuration
09/1990
09/25/1990US4959853 Frequency responsive selective ringing circuit
09/05/1990CN1045210A No cord telephone system
06/1990
06/06/1990CN1042786A Parallel microcomputer of user digital terminal with digital network of centralization service
03/1990
03/15/1990DE3902517C1 Circuit arrangement for a subscriber of a telecommunications network
01/1990
01/10/1990EP0350402A1 Personal computer integrating a digital ISDN subscriber terminal
01/03/1990EP0349079A2 Ciruit arrangement for the transmission of information
01/03/1990CN1038562A Multifunctional communication equipment for selective calling in group
11/1989
11/07/1989US4879727 Adaptive threshold sampling controller
10/1989
10/18/1989EP0337610A2 Facsimile apparatus
10/18/1989CN2046301U Multifunction mass groups selecting call communication equipment
10/17/1989EP0289526A4 Adaptive threshold sampling method.
08/1989
08/22/1989US4860285 Master/slave synchronizer
07/1989
07/26/1989CN1004916B Signal transmitting system of master-control telephone set
1 ... 56 57 58 59 60 61 62 63 64 65 66 67 68