GB2137454B - - Google Patents
Info
- Publication number
- GB2137454B GB2137454B GB8305573A GB8305573A GB2137454B GB 2137454 B GB2137454 B GB 2137454B GB 8305573 A GB8305573 A GB 8305573A GB 8305573 A GB8305573 A GB 8305573A GB 2137454 B GB2137454 B GB 2137454B
- Authority
- GB
- United Kingdom
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08305573A GB2137454A (en) | 1983-03-01 | 1983-03-01 | Handsfree telephone system |
| AU25055/84A AU2505584A (en) | 1983-03-01 | 1984-02-27 | Handsfree telephone system |
| EP84102044A EP0120324A3 (de) | 1983-03-01 | 1984-02-28 | Schaltungsanordnung für eine automatische Fernsprechanlage mit Freisprechbetrieb |
| JP3969884A JPS59210760A (ja) | 1983-03-01 | 1984-03-01 | ハンドフリ−電話システム |
| BE2/60355A BE899041A (fr) | 1983-03-01 | 1984-03-01 | Systeme telephonique a haut-parleur |
| ES530193A ES8503906A1 (es) | 1983-03-01 | 1984-03-01 | Un sistema telefonico automatico con posibilidad de manos libres |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08305573A GB2137454A (en) | 1983-03-01 | 1983-03-01 | Handsfree telephone system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB2137454B true GB2137454B (US07943777-20110517-C00090.png) | |
| GB8305573D0 GB8305573D0 (en) | 1983-03-30 |
| GB2137454A GB2137454A (en) | 1984-10-03 |
Family
ID=10538763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08305573A Withdrawn GB2137454A (en) | 1983-03-01 | 1983-03-01 | Handsfree telephone system |
Country Status (6)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3606516C1 (de) * | 1986-02-28 | 1987-06-19 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung fuer Freisprech- und Lauthoereinrichtungen bei Fernsprechapparaten |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO134477C (US07943777-20110517-C00090.png) * | 1974-10-29 | 1976-10-13 | Manus Max | |
| JPS549511A (en) * | 1977-06-24 | 1979-01-24 | Fujitsu Ltd | Digital gain control system using read only memory |
| US4329543A (en) * | 1979-09-06 | 1982-05-11 | Southwest Utilities, Inc. | Communication system |
| JPS5657376A (en) * | 1979-10-17 | 1981-05-19 | Fujitsu Ltd | Control system for digital transmission loss insertion |
| JPS5932943B2 (ja) * | 1979-10-17 | 1984-08-11 | 富士通株式会社 | 信号制御方式 |
| GB2137049B (en) * | 1983-03-15 | 1986-05-14 | Standard Telephones Cables Ltd | Handsfree telephone |
-
1983
- 1983-03-01 GB GB08305573A patent/GB2137454A/en not_active Withdrawn
-
1984
- 1984-02-27 AU AU25055/84A patent/AU2505584A/en not_active Abandoned
- 1984-02-28 EP EP84102044A patent/EP0120324A3/de not_active Withdrawn
- 1984-03-01 JP JP3969884A patent/JPS59210760A/ja active Pending
- 1984-03-01 ES ES530193A patent/ES8503906A1/es not_active Expired
- 1984-03-01 BE BE2/60355A patent/BE899041A/fr not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU2505584A (en) | 1984-09-06 |
| JPS59210760A (ja) | 1984-11-29 |
| ES530193A0 (es) | 1985-03-16 |
| ES8503906A1 (es) | 1985-03-16 |
| BE899041A (fr) | 1984-09-03 |
| EP0120324A3 (de) | 1986-12-03 |
| GB2137454A (en) | 1984-10-03 |
| GB8305573D0 (en) | 1983-03-30 |
| EP0120324A2 (de) | 1984-10-03 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |