CA1111582A - Signal processor for use with a telephone system and a digital transmission system - Google Patents
Signal processor for use with a telephone system and a digital transmission systemInfo
- Publication number
- CA1111582A CA1111582A CA303,984A CA303984A CA1111582A CA 1111582 A CA1111582 A CA 1111582A CA 303984 A CA303984 A CA 303984A CA 1111582 A CA1111582 A CA 1111582A
- Authority
- CA
- Canada
- Prior art keywords
- telephone
- signal
- output
- tone
- signals
- 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
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- 230000015654 memory Effects 0.000 description 38
- 230000006870 function Effects 0.000 description 30
- 230000011664 signaling Effects 0.000 description 26
- 230000000875 corresponding effect Effects 0.000 description 19
- 230000005236 sound signal Effects 0.000 description 14
- 230000008859 change Effects 0.000 description 12
- 238000004891 communication Methods 0.000 description 12
- 230000007704 transition Effects 0.000 description 11
- 230000001629 suppression Effects 0.000 description 9
- 230000009977 dual effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- LTXREWYXXSTFRX-QGZVFWFLSA-N Linagliptin Chemical compound N=1C=2N(C)C(=O)N(CC=3N=C4C=CC=CC4=C(C)N=3)C(=O)C=2N(CC#CC)C=1N1CCC[C@@H](N)C1 LTXREWYXXSTFRX-QGZVFWFLSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 101710200331 Cytochrome b-245 chaperone 1 Proteins 0.000 description 1
- 102100037186 Cytochrome b-245 chaperone 1 Human genes 0.000 description 1
- 101710119396 Cytochrome b-245 chaperone 1 homolog Proteins 0.000 description 1
- 241000896693 Disa Species 0.000 description 1
- 241001505295 Eros Species 0.000 description 1
- ULGZDMOVFRHVEP-RWJQBGPGSA-N Erythromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=O)[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 ULGZDMOVFRHVEP-RWJQBGPGSA-N 0.000 description 1
- 241000575946 Ione Species 0.000 description 1
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- 230000035559 beat frequency Effects 0.000 description 1
- 229940000425 combination drug Drugs 0.000 description 1
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- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 230000036316 preload Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
-
- 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
- H04Q1/50—Conversion between different kinds of signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Interface Circuits In Exchanges (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000368332A CA1117674A (en) | 1977-09-26 | 1981-01-12 | Signal processor for use with a telephone system and digital transmission system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83675677A | 1977-09-26 | 1977-09-26 | |
| US836,756 | 1977-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111582A true CA1111582A (en) | 1981-10-27 |
Family
ID=25272660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA303,984A Expired CA1111582A (en) | 1977-09-26 | 1978-05-24 | Signal processor for use with a telephone system and a digital transmission system |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1111582A (enrdf_load_stackoverflow) |
| DE (1) | DE2824057A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1598533A (enrdf_load_stackoverflow) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1182363A (en) * | 1968-07-26 | 1970-02-25 | Standard Telephones Cables Ltd | Subscriber Subset for PCM Telephone System |
| CA946530A (en) * | 1971-04-13 | 1974-04-30 | Northern Electric Company Limited | Signalling means and method |
-
1978
- 1978-05-24 CA CA303,984A patent/CA1111582A/en not_active Expired
- 1978-05-30 GB GB2440578A patent/GB1598533A/en not_active Expired
- 1978-05-30 DE DE19782824057 patent/DE2824057A1/de active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB1598533A (en) | 1981-09-23 |
| DE2824057C2 (enrdf_load_stackoverflow) | 1991-03-21 |
| DE2824057A1 (de) | 1979-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |