JPS57147339A - Measurement system for transmission characteristics - Google Patents
Measurement system for transmission characteristicsInfo
- Publication number
- JPS57147339A JPS57147339A JP3292181A JP3292181A JPS57147339A JP S57147339 A JPS57147339 A JP S57147339A JP 3292181 A JP3292181 A JP 3292181A JP 3292181 A JP3292181 A JP 3292181A JP S57147339 A JPS57147339 A JP S57147339A
- Authority
- JP
- Japan
- Prior art keywords
- signal tone
- level
- measurement signal
- backward
- measurement
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/48—Testing attenuation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3292181A JPS57147339A (en) | 1981-03-07 | 1981-03-07 | Measurement system for transmission characteristics |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3292181A JPS57147339A (en) | 1981-03-07 | 1981-03-07 | Measurement system for transmission characteristics |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57147339A true JPS57147339A (en) | 1982-09-11 |
JPS6237577B2 JPS6237577B2 (ja) | 1987-08-13 |
Family
ID=12372361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3292181A Granted JPS57147339A (en) | 1981-03-07 | 1981-03-07 | Measurement system for transmission characteristics |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57147339A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007282062A (ja) * | 2006-04-10 | 2007-10-25 | Hitachi Communication Technologies Ltd | Ip電話機 |
-
1981
- 1981-03-07 JP JP3292181A patent/JPS57147339A/ja active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007282062A (ja) * | 2006-04-10 | 2007-10-25 | Hitachi Communication Technologies Ltd | Ip電話機 |
Also Published As
Publication number | Publication date |
---|---|
JPS6237577B2 (ja) | 1987-08-13 |
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