GB2189968B - Telephone interface circuit - Google Patents
Telephone interface circuitInfo
- Publication number
- GB2189968B GB2189968B GB8709627A GB8709627A GB2189968B GB 2189968 B GB2189968 B GB 2189968B GB 8709627 A GB8709627 A GB 8709627A GB 8709627 A GB8709627 A GB 8709627A GB 2189968 B GB2189968 B GB 2189968B
- Authority
- GB
- United Kingdom
- Prior art keywords
- interface circuit
- telephone interface
- telephone
- circuit
- interface
- Prior art date
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/253—Telephone sets using digital voice transmission
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Input From Keyboards Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB868610348A GB8610348D0 (en) | 1986-04-28 | 1986-04-28 | Telephone interface circuit |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8709627D0 GB8709627D0 (en) | 1987-05-28 |
GB2189968A GB2189968A (en) | 1987-11-04 |
GB2189968B true GB2189968B (en) | 1990-01-04 |
Family
ID=10596974
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB868610348A Pending GB8610348D0 (en) | 1986-04-28 | 1986-04-28 | Telephone interface circuit |
GB8709627A Expired - Fee Related GB2189968B (en) | 1986-04-28 | 1987-04-23 | Telephone interface circuit |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB868610348A Pending GB8610348D0 (en) | 1986-04-28 | 1986-04-28 | Telephone interface circuit |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3714119A1 (en) |
GB (2) | GB8610348D0 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1547671A1 (en) * | 1988-07-20 | 1991-09-07 | Предприятие П/Я Р-6609 | Digital commutating systems |
US5235635A (en) * | 1990-09-27 | 1993-08-10 | Advanced Micro Devices, Inc. | Keypad monitor with keypad activity-based activation |
DE4228801A1 (en) * | 1991-10-03 | 1993-04-08 | Standard Elektrik Lorenz Ag | SUBSCRIBER TERMINAL FOR ISDN NETWORKS |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4087638A (en) * | 1976-10-01 | 1978-05-02 | Telaris Telecommunications Inc. | DTMF Communication system |
DE3323592A1 (en) * | 1983-06-30 | 1985-01-10 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for connecting data terminal equipment or modems to digital connection lines of a digital switching system, in particular a digital telephone switching system |
US4524244A (en) * | 1983-08-05 | 1985-06-18 | Cygnet Technologies, Inc. | Digital and voice telecommunication apparatus |
-
1986
- 1986-04-28 GB GB868610348A patent/GB8610348D0/en active Pending
-
1987
- 1987-04-23 GB GB8709627A patent/GB2189968B/en not_active Expired - Fee Related
- 1987-04-28 DE DE19873714119 patent/DE3714119A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
GB8709627D0 (en) | 1987-05-28 |
GB2189968A (en) | 1987-11-04 |
GB8610348D0 (en) | 1986-06-04 |
DE3714119A1 (en) | 1987-10-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970423 |