GB2004162A - Telephones with keyboards - Google Patents
Telephones with keyboardsInfo
- Publication number
- GB2004162A GB2004162A GB7835695A GB7835695A GB2004162A GB 2004162 A GB2004162 A GB 2004162A GB 7835695 A GB7835695 A GB 7835695A GB 7835695 A GB7835695 A GB 7835695A GB 2004162 A GB2004162 A GB 2004162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- keyboard
- networks
- telephone
- frequency
- microprocessor
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
- H04M1/2745—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
- H04M1/27495—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips implemented by means of discrete electronic components, i.e. neither programmable nor microprocessor-controlled
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/023—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Discrete Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Prepayment Telephone Systems (AREA)
- Telephone Function (AREA)
- Input From Keyboards Or The Like (AREA)
- Telephone Set Structure (AREA)
- Telephonic Communication Services (AREA)
Abstract
In keyboard telephones a microprocessor P is actuated by a keyboard C and controls a relay R1 with a pulse contact Li in one of the speech wires a or b, and a further relay R2 with a change- over dial-off-normal contact which in one position connects the speech wires a and b. A change-over switch F1 is switched into one position I in telephone networks with pulse selection and another position F in networks with frequency selection. A multi-frequency generator G feeds frequency pulses which correspond to the number selected by the keyboard C into the subscriber line, in networks with frequency selection. For a coin-operated telephone there is a transformer TR3 the primary and secondary windings of which are respectively connected to the generator G in parallel with the telephone receiver E. The microprocessor P receives data about credit and supplies to the receiver E a signal for additional payment. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1110777A CH620559A5 (en) | 1977-09-12 | 1977-09-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2004162A true GB2004162A (en) | 1979-03-21 |
GB2004162B GB2004162B (en) | 1982-02-10 |
Family
ID=4370119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7835695A Expired GB2004162B (en) | 1977-09-12 | 1978-09-05 | Telephones with keyboards |
Country Status (9)
Country | Link |
---|---|
AT (1) | AT366218B (en) |
BE (1) | BE870379A (en) |
CH (1) | CH620559A5 (en) |
DE (1) | DE2825785C2 (en) |
DK (1) | DK148867C (en) |
FR (1) | FR2402976B1 (en) |
GB (1) | GB2004162B (en) |
NL (1) | NL7809232A (en) |
NO (1) | NO148580C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2566215A1 (en) * | 1984-06-19 | 1985-12-20 | Semiconducteurs Ste Gle | DEVICE FOR ADAPTING A KEYBOARD WITH DECIMAL OR MULTI-FREQUENCY TRANSMISSION ON A TELEPHONE STATION |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4321778C2 (en) * | 1993-06-30 | 1996-10-02 | Siemens Ag | DTMF / IWV circuitry for telephone terminals |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1298077A (en) * | 1969-10-23 | 1972-11-29 | Post Office | Improvements in or relating to telephone subscribers' sets |
GB1395577A (en) * | 1972-05-11 | 1975-05-29 | Standard Telephones Cables Ltd | Telephones |
FR2270738B1 (en) * | 1974-02-14 | 1979-02-09 | Merlin Jean Claude | |
GB1524028A (en) * | 1974-10-22 | 1978-09-06 | Standard Telephones Cables Ltd | Repertory dialler |
-
1977
- 1977-09-12 CH CH1110777A patent/CH620559A5/de not_active IP Right Cessation
- 1977-09-29 FR FR7729308A patent/FR2402976B1/en not_active Expired
-
1978
- 1978-06-13 DE DE2825785A patent/DE2825785C2/en not_active Expired
- 1978-08-10 AT AT0580578A patent/AT366218B/en not_active IP Right Cessation
- 1978-09-05 GB GB7835695A patent/GB2004162B/en not_active Expired
- 1978-09-06 NO NO783049A patent/NO148580C/en unknown
- 1978-09-11 BE BE190404A patent/BE870379A/en not_active IP Right Cessation
- 1978-09-11 DK DK399878A patent/DK148867C/en not_active IP Right Cessation
- 1978-09-11 NL NL7809232A patent/NL7809232A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2566215A1 (en) * | 1984-06-19 | 1985-12-20 | Semiconducteurs Ste Gle | DEVICE FOR ADAPTING A KEYBOARD WITH DECIMAL OR MULTI-FREQUENCY TRANSMISSION ON A TELEPHONE STATION |
GB2160745A (en) * | 1984-06-19 | 1985-12-24 | Semiconducteurs Societe Genera | A device for adaptation of a decimal or multifrequency code dialling keyboard to a conventional telephone set |
Also Published As
Publication number | Publication date |
---|---|
DK399878A (en) | 1979-03-13 |
DK148867C (en) | 1986-04-21 |
ATA580578A (en) | 1981-07-15 |
FR2402976A1 (en) | 1979-04-06 |
NO783049L (en) | 1979-03-13 |
DE2825785A1 (en) | 1979-03-15 |
NO148580B (en) | 1983-07-25 |
FR2402976B1 (en) | 1985-08-30 |
BE870379A (en) | 1979-01-02 |
NO148580C (en) | 1983-11-02 |
DE2825785C2 (en) | 1983-11-03 |
AT366218B (en) | 1982-03-25 |
DK148867B (en) | 1985-10-28 |
NL7809232A (en) | 1979-03-14 |
GB2004162B (en) | 1982-02-10 |
CH620559A5 (en) | 1980-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |