GB1598533A - 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 system Download PDFInfo
- Publication number
- GB1598533A GB1598533A GB2440578A GB2440578A GB1598533A GB 1598533 A GB1598533 A GB 1598533A GB 2440578 A GB2440578 A GB 2440578A GB 2440578 A GB2440578 A GB 2440578A GB 1598533 A GB1598533 A GB 1598533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone
- signal
- signals
- tone
- output
- 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
- 230000005540 biological transmission Effects 0.000 title claims description 44
- 230000015654 memory Effects 0.000 claims description 52
- 230000011664 signaling Effects 0.000 claims description 32
- 230000005236 sound signal Effects 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 3
- 239000000872 buffer Substances 0.000 description 50
- 238000010586 diagram Methods 0.000 description 50
- 230000006870 function Effects 0.000 description 31
- 230000001629 suppression Effects 0.000 description 11
- 230000007704 transition Effects 0.000 description 11
- 238000013519 translation Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000035559 beat frequency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83675677A | 1977-09-26 | 1977-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1598533A true GB1598533A (en) | 1981-09-23 |
Family
ID=25272660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2440578A Expired GB1598533A (en) | 1977-09-26 | 1978-05-30 | 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 |
|---|---|
| DE2824057C2 (enrdf_load_stackoverflow) | 1991-03-21 |
| CA1111582A (en) | 1981-10-27 |
| DE2824057A1 (de) | 1979-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940530 |