IT1242169B - Sistema telefonico a tasti. - Google Patents

Sistema telefonico a tasti.

Info

Publication number: IT1242169B
Authority: IT; Italy
Prior art keywords: key system; telephone key; telephone; key
Prior art date: 1989-11-27

Application number

IT48506A

Other languages

English (en)

Other versions

IT9048506A0 (it

IT9048506A1 (it

Inventor

Yoshio Nomura

Original Assignee

Matsushita Electric Ind Co Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1989-11-27

Filing date

1990-11-22

Publication date

1994-02-16

1990-11-22 Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd

1990-11-22 Publication of IT9048506A0 publication Critical patent/IT9048506A0/it

1991-05-28 Publication of IT9048506A1 publication Critical patent/IT9048506A1/it

1994-02-16 Application granted granted Critical

1994-02-16 Publication of IT1242169B publication Critical patent/IT1242169B/it

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/008—Multiplex systems
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/20—Automatic or semi-automatic exchanges with means for interrupting existing connections; with means for breaking-in on conversations
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Multimedia (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Telephonic Communication Services (AREA)

IT48506A 1989-11-27 1990-11-22 Sistema telefonico a tasti. IT1242169B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP1307022A JPH03166894A (ja)	1989-11-27	1989-11-27	ボタン電話装置

Publications (3)

Publication Number	Publication Date
IT9048506A0 IT9048506A0 (it)	1990-11-22
IT9048506A1 IT9048506A1 (it)	1991-05-28
IT1242169B true IT1242169B (it)	1994-02-16

Family

ID=17964085

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT48506A IT1242169B (it)	1989-11-27	1990-11-22	Sistema telefonico a tasti.

Country Status (4)

Country	Link
US (1)	US5128989A (it)
JP (1)	JPH03166894A (it)
GB (1)	GB2239580B (it)
IT (1)	IT1242169B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5857017A (en) *	1990-10-12	1999-01-05	Canon Kabushiki Kaisha	Call waiting notifying apparatus
DE69124089T2 (de) *	1991-04-26	1997-06-12	Sel Alcatel Ag	Breitbandkonferenzsystem
JPH0698031A (ja) *	1992-09-14	1994-04-08	Fujitsu Ltd	ディジタル会議トランクシステム
CA2110943A1 (en) *	1993-12-08	1995-06-09	R. William Taylor	Secure whisper call announcement
US5483588A (en) *	1994-12-23	1996-01-09	Latitute Communications	Voice processing interface for a teleconference system
AU1433000A (en) *	1998-11-30	2000-06-19	Telefonaktiebolaget Lm Ericsson (Publ)	Isolated connection in a multiparty call

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4224688A (en) *	1978-10-30	1980-09-23	Northern Telecom Limited	Digital conference circuit
DE3005162A1 (de) *	1980-02-12	1981-08-20	Siemens AG, 1000 Berlin und 8000 München	Verfahren zur einspeisung von hoertoenen in konferenzverbindungen
US4388717A (en) *	1981-01-14	1983-06-14	International Telephone And Telegraph Corporation	Conference circuit for PCM system
IT1211024B (it) *	1981-04-16	1989-09-29	Italtel Spa	Circuito conferenza per centrali telefoniche di commutazione di tipo numerico.
US4389720A (en) *	1981-04-23	1983-06-21	Bell Telephone Laboratories, Incorporated	Distributed digital conferencing system
GB2128448B (en) *	1982-10-08	1985-11-13	Standard Telephones Cables Ltd	Telephone exchange conference circuit
GB2157129A (en) *	1984-04-06	1985-10-16	Standard Telephones Cables Ltd	Conference circuit
JPS6126357A (ja) *	1984-07-17	1986-02-05	Nitsuko Ltd	割込機能を有する電話システム

1989
- 1989-11-27 JP JP1307022A patent/JPH03166894A/ja active Pending
1990
- 1990-11-16 US US07/614,127 patent/US5128989A/en not_active Expired - Lifetime
- 1990-11-20 GB GB9025262A patent/GB2239580B/en not_active Expired - Fee Related
- 1990-11-22 IT IT48506A patent/IT1242169B/it active IP Right Grant

Also Published As

Publication number	Publication date
GB2239580B (en)	1994-08-31
IT9048506A0 (it)	1990-11-22
GB2239580A (en)	1991-07-03
GB9025262D0 (en)	1991-01-02
US5128989A (en)	1992-07-07
IT9048506A1 (it)	1991-05-28
JPH03166894A (ja)	1991-07-18

Legal Events

Date	Code	Title	Description
1994-02-16	0001	Granted
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19971129

Publication	Publication Date	Title
ITTO940012A0 (it)	1994-01-14	Sistema a chiavistello meccanico.
DE68917592D1 (de)	1994-09-22	Fernmeldevermittlungssystem.
DE69010011D1 (de)	1994-07-21	Kommunikationssystem.
DE69000003D1 (de)	1991-12-12	Funktelefonsystem.
FI895317A0 (fi)	1989-11-08	System foer byggklotsar.
FI914207A0 (fi)	1991-09-05	Anordning foer att ansluta material- banor.
DE68915768D1 (de)	1994-07-07	Kommunikationssystem.
DE68912569D1 (de)	1994-03-03	Schlüsselring.
DE68919995D1 (de)	1995-01-26	Sicherheitshandapparat.
DE3779031D1 (de)	1992-06-17	Rohrschluessel.
IT1242169B (it)	1994-02-16	Sistema telefonico a tasti.
IT1227400B (it)	1991-04-08	Impianto antifurto.
DE68916242D1 (de)	1994-07-21	Kommunikationssystem.
FI920089A0 (fi)	1992-01-09	Perforator.
NO900303L (no)	1990-07-24	Hoeytrykk-tetningssystem.
NO903904D0 (no)	1990-09-07	Kretskort-behandlingssystem.
FR2652945B3 (fr)	1991-09-13	Touche a effleurement.
FI902040A0 (fi)	1990-04-23	Foerfarande foer att framstaella tunnfilmresistansskikt.
IT8919865A0 (it)	1989-03-22	Architettura di sistema a chiave digitale.
ES1010180Y (es)	1990-05-01	Muneco dirigido a distancia.
FI891881A (fi)	1990-10-21	Foerfarande foer att skydda datatrafikfoerbindelser.
IT8905211A0 (it)	1989-09-26	Perfezionamento ai chiusini per pozzetti.
IT8883627A0 (it)	1988-03-31	Impianto antifurto.
NO167690C (no)	1991-11-27	Maaletaster.
ES1024041Y (es)	1994-04-01	Llavero-pastillero.