DE2430713A1 - Telefonanlage - Google Patents
TelefonanlageInfo
- Publication number
- DE2430713A1 DE2430713A1 DE2430713A DE2430713A DE2430713A1 DE 2430713 A1 DE2430713 A1 DE 2430713A1 DE 2430713 A DE2430713 A DE 2430713A DE 2430713 A DE2430713 A DE 2430713A DE 2430713 A1 DE2430713 A1 DE 2430713A1
- Authority
- DE
- Germany
- Prior art keywords
- voltage
- low
- amplifier
- frequency
- signal
- 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.)
- Pending
Links
- 230000011664 signaling Effects 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 239000000654 additive Substances 0.000 description 13
- 230000000996 additive effect Effects 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 11
- WYROLENTHWJFLR-ACLDMZEESA-N queuine Chemical compound C1=2C(=O)NC(N)=NC=2NC=C1CN[C@H]1C=C[C@H](O)[C@@H]1O WYROLENTHWJFLR-ACLDMZEESA-N 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- MMOXZBCLCQITDF-UHFFFAOYSA-N N,N-diethyl-m-toluamide Chemical group CCN(CC)C(=O)C1=CC=CC(C)=C1 MMOXZBCLCQITDF-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- 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
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA174,906A CA998484A (en) | 1973-06-26 | 1973-06-26 | Audio frequency signalling systems for telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2430713A1 true DE2430713A1 (de) | 1975-01-23 |
Family
ID=4097099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2430713A Pending DE2430713A1 (de) | 1973-06-26 | 1974-06-26 | Telefonanlage |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3894197A (enExample) |
| JP (1) | JPS5054206A (enExample) |
| CA (1) | CA998484A (enExample) |
| DE (1) | DE2430713A1 (enExample) |
| FR (1) | FR2235557B3 (enExample) |
| GB (1) | GB1465534A (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3232749A1 (de) * | 1981-09-11 | 1983-03-31 | Mitel Corp., Kanata, Ontario | Serviceschaltkreis fuer nebenstellentelefonanlagen |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185173A (en) * | 1976-10-01 | 1980-01-22 | Nippon Tsu Shin Kogyo K.K. | Key telephone call signalling circuit |
| US4219699A (en) * | 1978-10-13 | 1980-08-26 | Wescom, Inc. | Telephone supervision system using DTMF signals |
| US4313038A (en) * | 1978-10-13 | 1982-01-26 | Wescom, Inc. | DTMF Signal receiver |
| US4262171A (en) * | 1979-01-08 | 1981-04-14 | Catalyst Research Corporation | Telephone system in which communication between stations is controlled by computers at each individual station |
| FR2524743A1 (fr) * | 1982-04-01 | 1983-10-07 | Wadel Alain | Systeme d'alerte entre un centre de secours et des abonnes telephoniques a travers des lignes telephoniques |
| US4650489A (en) * | 1986-01-30 | 1987-03-17 | Massachusetts Institute Of Technology | Prosthetic device for implantation in bone |
| DE3606516C1 (de) * | 1986-02-28 | 1987-06-19 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung fuer Freisprech- und Lauthoereinrichtungen bei Fernsprechapparaten |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3459895A (en) * | 1966-05-19 | 1969-08-05 | Itt | Centrally powered subscriber carrier systems |
| US3601538A (en) * | 1969-02-24 | 1971-08-24 | Stromberg Carlson Corp | Carrier and voice-frequency telephone system |
| US3781481A (en) * | 1971-09-30 | 1973-12-25 | Stromberg Carlson Corp | Amplifier select and control circuit |
| CA968477A (en) * | 1972-07-24 | 1975-05-27 | Microsystems International Limited | Threshold circuit for tone-ringer or like load means |
-
1973
- 1973-06-26 CA CA174,906A patent/CA998484A/en not_active Expired
- 1973-07-09 US US377831A patent/US3894197A/en not_active Expired - Lifetime
-
1974
- 1974-05-09 GB GB2048074A patent/GB1465534A/en not_active Expired
- 1974-06-19 FR FR7421276A patent/FR2235557B3/fr not_active Expired
- 1974-06-26 DE DE2430713A patent/DE2430713A1/de active Pending
- 1974-06-26 JP JP49072420A patent/JPS5054206A/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3232749A1 (de) * | 1981-09-11 | 1983-03-31 | Mitel Corp., Kanata, Ontario | Serviceschaltkreis fuer nebenstellentelefonanlagen |
Also Published As
| Publication number | Publication date |
|---|---|
| CA998484A (en) | 1976-10-12 |
| US3894197A (en) | 1975-07-08 |
| GB1465534A (en) | 1977-02-23 |
| FR2235557A1 (enExample) | 1975-01-24 |
| FR2235557B3 (enExample) | 1977-04-15 |
| JPS5054206A (enExample) | 1975-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |