GB2004441B - Circuit arrangements for detecting the use of telephone extensions in automatic private branch telephone exchanges with a plurality of extensions - Google Patents
Circuit arrangements for detecting the use of telephone extensions in automatic private branch telephone exchanges with a plurality of extensionsInfo
- Publication number
- GB2004441B GB2004441B GB7836519A GB7836519A GB2004441B GB 2004441 B GB2004441 B GB 2004441B GB 7836519 A GB7836519 A GB 7836519A GB 7836519 A GB7836519 A GB 7836519A GB 2004441 B GB2004441 B GB 2004441B
- Authority
- GB
- United Kingdom
- Prior art keywords
- extensions
- telephone
- detecting
- private branch
- circuit arrangements
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/34—Charging, billing or metering arrangements for private branch exchanges
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Alarm Systems (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Telephone Set Structure (AREA)
- Telephone Function (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1120977A CH608153A5 (US07902200-20110308-C00004.png) | 1977-09-14 | 1977-09-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2004441A GB2004441A (en) | 1979-03-28 |
| GB2004441B true GB2004441B (en) | 1982-01-06 |
Family
ID=4371140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7836519A Expired GB2004441B (en) | 1977-09-14 | 1978-09-12 | Circuit arrangements for detecting the use of telephone extensions in automatic private branch telephone exchanges with a plurality of extensions |
Country Status (9)
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6508310A (US07902200-20110308-C00004.png) * | 1965-06-29 | 1966-12-30 | ||
| FR1528080A (fr) * | 1967-04-28 | 1968-06-07 | Constr Telephoniques | Recherche d'identité de circuits dans un central téléphonique |
| SE377022B (US07902200-20110308-C00004.png) * | 1970-06-10 | 1975-06-16 | Commw Of Australia |
-
1977
- 1977-09-14 CH CH1120977A patent/CH608153A5/xx not_active IP Right Cessation
- 1977-10-10 DE DE2745554A patent/DE2745554C3/de not_active Expired
-
1978
- 1978-07-17 NO NO782475A patent/NO145861C/no unknown
- 1978-08-31 AT AT0630678A patent/AT376091B/de not_active IP Right Cessation
- 1978-09-12 GB GB7836519A patent/GB2004441B/en not_active Expired
- 1978-09-12 FR FR7826116A patent/FR2403698A2/fr active Granted
- 1978-09-12 SE SE7809605A patent/SE430368B/sv unknown
- 1978-09-13 IT IT7827586A patent/IT7827586A0/it unknown
- 1978-09-13 BE BE190464A patent/BE870454A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE7809605L (sv) | 1979-03-15 |
| DE2745554B2 (de) | 1979-07-26 |
| BE870454A (fr) | 1979-01-02 |
| FR2403698B2 (US07902200-20110308-C00004.png) | 1983-11-25 |
| DE2745554A1 (de) | 1979-03-15 |
| NO145861C (no) | 1982-06-09 |
| DE2745554C3 (de) | 1980-04-10 |
| FR2403698A2 (fr) | 1979-04-13 |
| SE430368B (sv) | 1983-11-07 |
| ATA630678A (de) | 1984-02-15 |
| GB2004441A (en) | 1979-03-28 |
| IT7827586A0 (it) | 1978-09-13 |
| NO782475L (no) | 1979-03-15 |
| CH608153A5 (US07902200-20110308-C00004.png) | 1978-12-15 |
| NO145861B (no) | 1982-03-01 |
| AT376091B (de) | 1984-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |