JPS554145A - Terminal test system - Google Patents
Terminal test systemInfo
- Publication number
- JPS554145A JPS554145A JP7698478A JP7698478A JPS554145A JP S554145 A JPS554145 A JP S554145A JP 7698478 A JP7698478 A JP 7698478A JP 7698478 A JP7698478 A JP 7698478A JP S554145 A JPS554145 A JP S554145A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- center station
- mpu13
- transferred
- packet
- 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
- 238000000034 method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To enable a tester staying in a center station to make tests of all subscribers' terminals, by sending the analog output of a decoder back to the analog input terminal of a coder on receiving a command signal from the center station. CONSTITUTION:Command signal 1 is transferred from the center station to MPU (microprocessor) 13 via high-level data link controller 17 of subscriber's terminal 1'. Then, MPU13 operates control circuit 22 to close switch 21. Next, voice packet 3 for tests is transferred from the center station to MPU13 via controller 17. After performing the fixed process of the packet, MPU13 transferred coded signal 4 to decoder 16. Here, signal 4 is converted into analog signal 5, which is sent back to coder 12 via switch 21. Then, signal 5 is converted into coded signal 6, which is transferred to MPU13. After performing fixed packet signal process of this signal 6, MPU13 sends out voice packet signal 7 from controller 17 to the center station. The center station makes a decision on whether signal 3 sent out is identical or not with signal 7 sent back.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7698478A JPS554145A (en) | 1978-06-27 | 1978-06-27 | Terminal test system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7698478A JPS554145A (en) | 1978-06-27 | 1978-06-27 | Terminal test system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS554145A true JPS554145A (en) | 1980-01-12 |
Family
ID=13621034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7698478A Pending JPS554145A (en) | 1978-06-27 | 1978-06-27 | Terminal test system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS554145A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5787646A (en) * | 1980-11-20 | 1982-06-01 | Ricoh Co Ltd | Data transmission testing device |
JPS61147625A (en) * | 1984-12-21 | 1986-07-05 | Hitachi Ltd | Train information broadcasting system |
-
1978
- 1978-06-27 JP JP7698478A patent/JPS554145A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5787646A (en) * | 1980-11-20 | 1982-06-01 | Ricoh Co Ltd | Data transmission testing device |
JPS61147625A (en) * | 1984-12-21 | 1986-07-05 | Hitachi Ltd | Train information broadcasting system |
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