ATA427879A - CIRCUIT ARRANGEMENT FOR A TELEPHONE WITH A HANDS-FREE UNIT - Google Patents
CIRCUIT ARRANGEMENT FOR A TELEPHONE WITH A HANDS-FREE UNITInfo
- Publication number
- ATA427879A ATA427879A AT427879A AT427879A ATA427879A AT A427879 A ATA427879 A AT A427879A AT 427879 A AT427879 A AT 427879A AT 427879 A AT427879 A AT 427879A AT A427879 A ATA427879 A AT A427879A
- Authority
- AT
- Austria
- Prior art keywords
- hands
- telephone
- circuit arrangement
- free unit
- free
- Prior art date
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
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782826671 DE2826671C3 (en) | 1978-06-19 | 1978-06-19 | Circuit arrangement for a telephone with a speakerphone |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA427879A true ATA427879A (en) | 1983-04-15 |
AT373111B AT373111B (en) | 1983-12-27 |
Family
ID=6042078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT427879A AT373111B (en) | 1978-06-19 | 1979-06-18 | CIRCUIT ARRANGEMENT FOR A TELEPHONE WITH A HANDS-FREE UNIT |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT373111B (en) |
BE (1) | BE877077R (en) |
DE (1) | DE2826671C3 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4536888A (en) * | 1981-08-21 | 1985-08-20 | Plantronics, Inc. | Voice communication instrument system with line-powered receiver conditioning circuit |
US4497980A (en) * | 1983-06-16 | 1985-02-05 | Itt Corporation | Handsfree circuit for telephone instrument |
GB8317706D0 (en) * | 1983-06-29 | 1983-08-03 | Standard Telephones Cables Ltd | Telephone subsets |
DE3407203A1 (en) * | 1984-02-28 | 1985-08-29 | Siemens AG, 1000 Berlin und 8000 München | Telephone station with hands-free operation |
DE3616314A1 (en) * | 1986-05-13 | 1987-11-19 | Krone Ag | Telephone set with hands-free device |
-
1978
- 1978-06-19 DE DE19782826671 patent/DE2826671C3/en not_active Expired
-
1979
- 1979-06-18 AT AT427879A patent/AT373111B/en not_active IP Right Cessation
- 1979-06-19 BE BE2/57881A patent/BE877077R/en active
Also Published As
Publication number | Publication date |
---|---|
AT373111B (en) | 1983-12-27 |
BE877077R (en) | 1979-12-19 |
DE2826671B2 (en) | 1980-10-30 |
DE2826671C3 (en) | 1981-08-06 |
DE2826671A1 (en) | 1979-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |