BR8004167A - Sistema de troca de telefone utilizando aparelhos telefone utilizando aparelhos telefonicos - Google Patents
Sistema de troca de telefone utilizando aparelhos telefone utilizando aparelhos telefonicosInfo
- Publication number
- BR8004167A BR8004167A BR8004167A BR8004167A BR8004167A BR 8004167 A BR8004167 A BR 8004167A BR 8004167 A BR8004167 A BR 8004167A BR 8004167 A BR8004167 A BR 8004167A BR 8004167 A BR8004167 A BR 8004167A
- Authority
- BR
- Brazil
- Prior art keywords
- telephone
- appliances
- exchange system
- telephone appliances
- telephone exchange
- Prior art date
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
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
- H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54083485A JPS6022868B2 (ja) | 1979-07-03 | 1979-07-03 | ボタン電話交換システム |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR8004167A true BR8004167A (pt) | 1981-01-21 |
Family
ID=13803768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR8004167A BR8004167A (pt) | 1979-07-03 | 1980-07-03 | Sistema de troca de telefone utilizando aparelhos telefone utilizando aparelhos telefonicos |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4383137A (pt) |
| JP (1) | JPS6022868B2 (pt) |
| AU (1) | AU523587B2 (pt) |
| BR (1) | BR8004167A (pt) |
| CA (1) | CA1148240A (pt) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5842353A (ja) * | 1981-09-05 | 1983-03-11 | Nippon Telegr & Teleph Corp <Ntt> | 端末指定着信応答装置 |
| GB2128446B (en) * | 1982-10-02 | 1985-09-04 | Standard Telephones Cables Ltd | Telecommunication exchange |
| DE3311900A1 (de) * | 1983-03-31 | 1984-10-04 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung fuer fernmeldeanlagen, insbesondere fernsprechvermittlungsanlagen mit informationsverarbeitenden schaltwerken und einrichtungen zur abwehr von ueberbelastungen |
| US4626627A (en) * | 1983-10-07 | 1986-12-02 | Teledex | Telephone line selector for use with a PBX |
| US4607144A (en) * | 1984-01-20 | 1986-08-19 | Telecomputer Corporation, Ltd. | Apparatus for enhancing the use of electromechanical key telephone systems |
| US4591671A (en) * | 1984-05-31 | 1986-05-27 | Pks/Communications, Inc. | Telephone having built-in test capability for use in key telephone system |
| US4638124A (en) * | 1984-09-21 | 1987-01-20 | Itt Corporation | Key telephone system with distributed control |
| GB2173326B (en) * | 1985-03-18 | 1989-06-21 | Nitsuko Ltd | Data transmission system |
| US4759055A (en) * | 1985-07-25 | 1988-07-19 | Tamura Electric Works, Ltd. | Key telephone system |
| US4741026A (en) * | 1986-05-29 | 1988-04-26 | American Telephone And Telegraph Company, At&T Bell Laboratories | Message signaling arrangement between a switching system and user terminals |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3604857A (en) * | 1969-07-25 | 1971-09-14 | Bell Telephone Labor Inc | Line-oriented key telephone system |
| US3872261A (en) * | 1973-04-05 | 1975-03-18 | Nitsuko Ltd | Switching apparatus for use in a paging system of a key telephone system |
| US4092501A (en) * | 1973-12-05 | 1978-05-30 | Iwasaki Tsushinki Kabushiki Kaisha | Key telephone system |
| US3973085A (en) * | 1974-09-26 | 1976-08-03 | The Anaconda Company | Key telephone system with directly associated station cards and sets |
| US4196316A (en) * | 1977-09-13 | 1980-04-01 | Bell Telephone Laboratories, Incorporated | Program controlled communication system having individually rearrangeable line selection |
| US4154988A (en) * | 1977-10-21 | 1979-05-15 | Wescom Switching, Inc. | Method and means for accessing program memory of a common control telecommunications switching system |
-
1979
- 1979-07-03 JP JP54083485A patent/JPS6022868B2/ja not_active Expired
-
1980
- 1980-06-24 US US06/162,568 patent/US4383137A/en not_active Expired - Lifetime
- 1980-06-27 CA CA000355022A patent/CA1148240A/en not_active Expired
- 1980-07-02 AU AU60038/80A patent/AU523587B2/en not_active Ceased
- 1980-07-03 BR BR8004167A patent/BR8004167A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU523587B2 (en) | 1982-08-05 |
| JPS6022868B2 (ja) | 1985-06-04 |
| CA1148240A (en) | 1983-06-14 |
| JPS568983A (en) | 1981-01-29 |
| AU6003880A (en) | 1981-01-15 |
| US4383137A (en) | 1983-05-10 |
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