NO880103L - Tilleggsutstyr for en telefon tilsluttet en telefonledning - Google Patents
Tilleggsutstyr for en telefon tilsluttet en telefonledningInfo
- Publication number
- NO880103L NO880103L NO88880103A NO880103A NO880103L NO 880103 L NO880103 L NO 880103L NO 88880103 A NO88880103 A NO 88880103A NO 880103 A NO880103 A NO 880103A NO 880103 L NO880103 L NO 880103L
- Authority
- NO
- Norway
- Prior art keywords
- additional equipment
- load
- voltage
- equipment according
- telephone line
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 48
- 230000001965 increasing effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009131 signaling function Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
-
- 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Selective Calling Equipment (AREA)
- Telephone Function (AREA)
- Communication Cables (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3736797 | 1987-10-30 | ||
| DE19873740026 DE3740026A1 (de) | 1987-10-30 | 1987-11-26 | Zusatzeinrichtung zu einem an einer telefonleitung angeschlossenen telefon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO880103D0 NO880103D0 (no) | 1988-01-12 |
| NO880103L true NO880103L (no) | 1989-05-02 |
Family
ID=25861284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO88880103A NO880103L (no) | 1987-10-30 | 1988-01-12 | Tilleggsutstyr for en telefon tilsluttet en telefonledning |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE3740026A1 (sv) |
| DK (1) | DK158288A (sv) |
| GB (1) | GB2212029A (sv) |
| NO (1) | NO880103L (sv) |
| SE (1) | SE8801048L (sv) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4140153C2 (de) * | 1991-12-05 | 2003-04-03 | Tenovis Gmbh & Co Kg | Schaltungsanordnung für einen Fernsprechapparat mit einer Tonrufschaltung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3673339A (en) * | 1970-07-22 | 1972-06-27 | Bell Telephone Labor Inc | Artificial line busy circuit |
| FR2177236A5 (sv) * | 1972-03-21 | 1973-11-02 | Socotel |
-
1987
- 1987-11-26 DE DE19873740026 patent/DE3740026A1/de not_active Withdrawn
-
1988
- 1988-01-12 NO NO88880103A patent/NO880103L/no unknown
- 1988-01-12 GB GB8800631A patent/GB2212029A/en not_active Withdrawn
- 1988-03-22 SE SE8801048A patent/SE8801048L/sv not_active Application Discontinuation
- 1988-03-23 DK DK158288A patent/DK158288A/da not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO880103D0 (no) | 1988-01-12 |
| SE8801048L (sv) | 1989-05-01 |
| DE3740026A1 (de) | 1989-05-11 |
| GB8800631D0 (en) | 1988-02-10 |
| DK158288D0 (da) | 1988-03-23 |
| DK158288A (da) | 1989-05-01 |
| GB2212029A (en) | 1989-07-12 |
| SE8801048D0 (sv) | 1988-03-22 |
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