JPS53112006A - Reception circuit for multi-frequency signal in telephone exchanger or the like - Google Patents
Reception circuit for multi-frequency signal in telephone exchanger or the likeInfo
- Publication number
- JPS53112006A JPS53112006A JP2664177A JP2664177A JPS53112006A JP S53112006 A JPS53112006 A JP S53112006A JP 2664177 A JP2664177 A JP 2664177A JP 2664177 A JP2664177 A JP 2664177A JP S53112006 A JPS53112006 A JP S53112006A
- Authority
- JP
- Japan
- Prior art keywords
- frequency signal
- reception circuit
- telephone exchanger
- signal
- exchanger
- 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
- 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)
Abstract
PURPOSE:To make easy integration, by performing the signal selection with the filters of the same constitution indepently of channel, through the utilization of the signal having the same frequency as the signal received as the reference signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2664177A JPS53112006A (en) | 1977-03-11 | 1977-03-11 | Reception circuit for multi-frequency signal in telephone exchanger or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2664177A JPS53112006A (en) | 1977-03-11 | 1977-03-11 | Reception circuit for multi-frequency signal in telephone exchanger or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53112006A true JPS53112006A (en) | 1978-09-30 |
Family
ID=12199067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2664177A Pending JPS53112006A (en) | 1977-03-11 | 1977-03-11 | Reception circuit for multi-frequency signal in telephone exchanger or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53112006A (en) |
-
1977
- 1977-03-11 JP JP2664177A patent/JPS53112006A/en active Pending
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