JPS575459A - Communication system for test device control information - Google Patents
Communication system for test device control informationInfo
- Publication number
- JPS575459A JPS575459A JP8060880A JP8060880A JPS575459A JP S575459 A JPS575459 A JP S575459A JP 8060880 A JP8060880 A JP 8060880A JP 8060880 A JP8060880 A JP 8060880A JP S575459 A JPS575459 A JP S575459A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- control information
- test device
- signal
- gate
- 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
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
- H04M3/244—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/301—Circuit arrangements at the subscriber's side of the line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
PURPOSE:To simplify the circuit constitution, by using the bit of the least significant digit among 8-bit of audio data for the communication of control information between a test device and an operating device. CONSTITUTION:An audio communication signal S1 from an operating device to a transmission reception section TDD-S is coded at a coding and decoding device CODEC1 to be a PCM code in 8-bit constitution and applied to one input terminal of an AND gate AGI1. Further, to another input terminal of the AND gate AGI1, the signal ''0'' is applied to the bit location of the least significant digit of the said 8-bit and it is transmitted on a control information communicating line L via and OR gate OG1 as a 7-bit PCM signal. On the other hand, a control information signal D1 is inserted to the bit location of the said least significant digit and similarly transmitted on a control information communicating line L. Further, these signals are separately used at a transmission and reception section TD-S of a test device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8060880A JPS575459A (en) | 1980-06-14 | 1980-06-14 | Communication system for test device control information |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8060880A JPS575459A (en) | 1980-06-14 | 1980-06-14 | Communication system for test device control information |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS575459A true JPS575459A (en) | 1982-01-12 |
Family
ID=13723035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8060880A Pending JPS575459A (en) | 1980-06-14 | 1980-06-14 | Communication system for test device control information |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS575459A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61129953A (en) * | 1984-11-29 | 1986-06-17 | Nec Corp | Subscriber's line test system |
-
1980
- 1980-06-14 JP JP8060880A patent/JPS575459A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61129953A (en) * | 1984-11-29 | 1986-06-17 | Nec Corp | Subscriber's line test system |
JPH0443467B2 (en) * | 1984-11-29 | 1992-07-16 | Nippon Electric Co |
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