GB1482366A - Telephone systems - Google Patents
Telephone systemsInfo
- Publication number
- GB1482366A GB1482366A GB53278/74A GB5327874A GB1482366A GB 1482366 A GB1482366 A GB 1482366A GB 53278/74 A GB53278/74 A GB 53278/74A GB 5327874 A GB5327874 A GB 5327874A GB 1482366 A GB1482366 A GB 1482366A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- ringing
- gate
- circuit
- bursts
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
1482366 Automatic exchange systems SIEMENS AG 10 Dec 1974 [14 Dec 1973] 53278/74 Heading H4K The supply of ringing current is controlled by a gating arrangement including a counter which determines the periodicity of the bursts of ring- ing current. The circuit arrangement, Fig. 1, can be produced in monolithic integrated form and one such circuit may be provided for each line circuit of the exchange. In operation a ring command signal is supplied on wire 1 to enable a 0-15 binary counter to count a 3À125 Hz clock pulse train supplied on wire T and derived from the mains voltage. Whilst the counter counts from 0-2 gate G6 is enabled to connect a ringing signal to the subscriber's line. For the counting range 3-15 gate G6 is inhibited to provide a pause. The counter is reset from its final state via gate G1 and the sequence then repeats, such that approximately one second bursts of ringing signal separated by approximately 4 second periods of silence are produced. The removal of the command signal trips the ringing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2362328A DE2362328C2 (en) | 1973-12-14 | 1973-12-14 | Circuit arrangement for generating the first call and the further call in telephone systems, in particular in telephone branch exchange systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1482366A true GB1482366A (en) | 1977-08-10 |
Family
ID=5900822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB53278/74A Expired GB1482366A (en) | 1973-12-14 | 1974-12-10 | Telephone systems |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT333853B (en) |
| BE (1) | BE823333A (en) |
| CH (1) | CH588195A5 (en) |
| DE (1) | DE2362328C2 (en) |
| DK (1) | DK139499C (en) |
| FR (1) | FR2254918B1 (en) |
| GB (1) | GB1482366A (en) |
| IT (1) | IT1026913B (en) |
| LU (1) | LU71469A1 (en) |
| NL (1) | NL158672B (en) |
| SE (1) | SE7415708L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2538597C2 (en) * | 1975-08-29 | 1982-01-14 | Siemens AG, 1000 Berlin und 8000 München | Method and circuit arrangement for carrying out the method for telecommunications, in particular telephone systems with a first call and subsequent call to a desired subscriber |
| DE2935119C2 (en) * | 1979-08-30 | 1981-09-24 | Siemens AG, 1000 Berlin und 8000 München | Indirectly controlled switching system, in particular telephone branch exchange, with a central control unit and with monitoring of the selected remote exchange code |
| DE3218506A1 (en) * | 1982-04-02 | 1983-10-13 | Siemens AG, 1000 Berlin und 8000 München | CIRCUIT ARRANGEMENT FOR TELECOMMUNICATION SWITCHING SYSTEMS, IN PARTICULAR TELEPHONE SWITCHING SYSTEMS, WITH SWITCHING DEVICES FOR SIGNALING |
-
1973
- 1973-12-14 DE DE2362328A patent/DE2362328C2/en not_active Expired
-
1974
- 1974-11-20 AT AT929574A patent/AT333853B/en not_active IP Right Cessation
- 1974-12-09 NL NL7416008.A patent/NL158672B/en not_active IP Right Cessation
- 1974-12-10 FR FR7440469A patent/FR2254918B1/fr not_active Expired
- 1974-12-10 GB GB53278/74A patent/GB1482366A/en not_active Expired
- 1974-12-10 IT IT30347/74A patent/IT1026913B/en active
- 1974-12-11 CH CH1650974A patent/CH588195A5/xx not_active IP Right Cessation
- 1974-12-12 LU LU71469A patent/LU71469A1/xx unknown
- 1974-12-13 DK DK650874A patent/DK139499C/en active
- 1974-12-13 SE SE7415708A patent/SE7415708L/xx unknown
- 1974-12-13 BE BE151488A patent/BE823333A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK650874A (en) | 1975-08-11 |
| ATA929574A (en) | 1976-04-15 |
| FR2254918B1 (en) | 1979-10-12 |
| DK139499B (en) | 1979-02-26 |
| SE7415708L (en) | 1975-06-16 |
| LU71469A1 (en) | 1975-06-11 |
| CH588195A5 (en) | 1977-05-31 |
| DE2362328B1 (en) | 1975-03-20 |
| FR2254918A1 (en) | 1975-07-11 |
| NL158672B (en) | 1978-11-15 |
| NL7416008A (en) | 1975-06-17 |
| AT333853B (en) | 1976-12-10 |
| DK139499C (en) | 1979-08-06 |
| IT1026913B (en) | 1978-10-20 |
| BE823333A (en) | 1975-06-13 |
| DE2362328C2 (en) | 1979-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |