JPS5730451A - Modulator and demodulator of information processing center - Google Patents
Modulator and demodulator of information processing centerInfo
- Publication number
- JPS5730451A JPS5730451A JP10525080A JP10525080A JPS5730451A JP S5730451 A JPS5730451 A JP S5730451A JP 10525080 A JP10525080 A JP 10525080A JP 10525080 A JP10525080 A JP 10525080A JP S5730451 A JPS5730451 A JP S5730451A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- multifrequency
- response
- demodulator
- modulator
- 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
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
- H04M11/066—Telephone sets adapted for data transmision
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Communication Control (AREA)
Abstract
PURPOSE:To simplify the constitution of a circuit connecting mechanism by adding the functions of a multifrequency signal receiver to the modulator and demodulator of an information processing center and by switching operations in response to a signal from the circuit connecting mechanism. CONSTITUTION:A modulator and demodulator (MODEN) MOD has the function of detecting a multifrequency signal, the function of converting digitized four-bit multifrequency signal information into a series signal, and the function of switching and sending series signals to a signal line RD. When an operator at a terminal which is not in the figure dials some number with the handset off the hook, a call display signal Ci is inputted to a communication controller NCU and after a connection, a terminal ready signal ER arrives, so that the MODEM MOD sends back a data set ready signal DR. In response to a switching signal SEL from a voice response adapter VOA, an audio response is made and when a push-button signal is received from a push-button telephone as a terminal, it is sent from the signal line RD to a circuit adapter LA, which composes one character and performs successive reception. Then, the MODEM MOD finishes the reception of the multifrequency signal and received data.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10525080A JPS5730451A (en) | 1980-07-31 | 1980-07-31 | Modulator and demodulator of information processing center |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10525080A JPS5730451A (en) | 1980-07-31 | 1980-07-31 | Modulator and demodulator of information processing center |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5730451A true JPS5730451A (en) | 1982-02-18 |
Family
ID=14402401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10525080A Pending JPS5730451A (en) | 1980-07-31 | 1980-07-31 | Modulator and demodulator of information processing center |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5730451A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59165543A (en) * | 1983-03-09 | 1984-09-18 | Fujitsu Ltd | Key distribution system of cipher device |
-
1980
- 1980-07-31 JP JP10525080A patent/JPS5730451A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59165543A (en) * | 1983-03-09 | 1984-09-18 | Fujitsu Ltd | Key distribution system of cipher device |
JPH0456504B2 (en) * | 1983-03-09 | 1992-09-08 | Fujitsu Ltd |
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