DE1914814A1 - Empfaenger fuer Signalisierungssignale mit einer im Gespraechsfrequenzband liegenden Signalisierungsfrequenz - Google Patents
Empfaenger fuer Signalisierungssignale mit einer im Gespraechsfrequenzband liegenden SignalisierungsfrequenzInfo
- Publication number
- DE1914814A1 DE1914814A1 DE19691914814 DE1914814A DE1914814A1 DE 1914814 A1 DE1914814 A1 DE 1914814A1 DE 19691914814 DE19691914814 DE 19691914814 DE 1914814 A DE1914814 A DE 1914814A DE 1914814 A1 DE1914814 A1 DE 1914814A1
- Authority
- DE
- Germany
- Prior art keywords
- signals
- signaling
- frequency
- level
- frequencies
- 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 title claims description 47
- 238000000926 separation method Methods 0.000 claims description 4
- 230000005236 sound signal Effects 0.000 claims 2
- 238000001228 spectrum Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- KJUCPVIVNLPLEE-UHFFFAOYSA-N 2,6-difluoro-n-[2-fluoro-5-[5-[2-[(6-morpholin-4-ylpyridin-3-yl)amino]pyrimidin-4-yl]-2-propan-2-yl-1,3-thiazol-4-yl]phenyl]benzenesulfonamide Chemical compound S1C(C(C)C)=NC(C=2C=C(NS(=O)(=O)C=3C(=CC=CC=3F)F)C(F)=CC=2)=C1C(N=1)=CC=NC=1NC(C=N1)=CC=C1N1CCOCC1 KJUCPVIVNLPLEE-UHFFFAOYSA-N 0.000 description 1
- 108010076282 Factor IX Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229940004975 interceptor Drugs 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6805157A NL6805157A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1968-04-10 | 1968-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1914814A1 true DE1914814A1 (de) | 1969-11-06 |
Family
ID=19803316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19691914814 Pending DE1914814A1 (de) | 1968-04-10 | 1969-03-22 | Empfaenger fuer Signalisierungssignale mit einer im Gespraechsfrequenzband liegenden Signalisierungsfrequenz |
Country Status (8)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2141502B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1971-06-01 | 1973-06-29 | Ibm France | |
| US4284851A (en) * | 1979-06-29 | 1981-08-18 | Bell Telephone Laboratories, Incorporated | Arrangement for frustrating fraudulent telephone calls |
-
1968
- 1968-04-10 NL NL6805157A patent/NL6805157A/xx unknown
-
1969
- 1969-03-22 DE DE19691914814 patent/DE1914814A1/de active Pending
- 1969-03-27 US US810986A patent/US3588374A/en not_active Expired - Lifetime
- 1969-04-08 GB GB07896/69A patent/GB1268782A/en not_active Expired
- 1969-04-08 SE SE04949/69A patent/SE332650B/xx unknown
- 1969-04-08 AT AT339869A patent/AT287069B/de not_active IP Right Cessation
- 1969-04-09 BE BE731266D patent/BE731266A/xx unknown
- 1969-04-10 FR FR6911068A patent/FR2005998A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US3588374A (en) | 1971-06-28 |
| GB1268782A (en) | 1972-03-29 |
| BE731266A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1969-10-09 |
| AT287069B (de) | 1971-01-11 |
| FR2005998A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1969-12-19 |
| SE332650B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1971-02-15 |
| NL6805157A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1969-10-14 |
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