JPS63129351U - - Google Patents
Info
- Publication number
- JPS63129351U JPS63129351U JP1987020694U JP2069487U JPS63129351U JP S63129351 U JPS63129351 U JP S63129351U JP 1987020694 U JP1987020694 U JP 1987020694U JP 2069487 U JP2069487 U JP 2069487U JP S63129351 U JPS63129351 U JP S63129351U
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- communication device
- transmitter
- wire transmission
- communicates
- 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
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
- Communication Control (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Description
図は本考案の一実施例を示す回路図である。
１……２線式伝送路、３……発信器、５……通
信装置、５１……接続判定回路。
The figure is a circuit diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Two-wire transmission line, 3... Transmitter, 5... Communication device, 51... Connection determination circuit.
Claims (1)
され、当該２線式伝送路を介して上記発信器と通
信を行なう通信装置において、伝送路への接続の
有無を判定する判定手段を設けたことを特徴とす
る通信装置。 In a communication device that is optionally connected to a two-wire transmission line to which a transmitter is connected and communicates with the transmitter via the two-wire transmission line, a determination means for determining whether or not there is a connection to the transmission line is provided. A communication device characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987020694U JPS63129351U (en) | 1987-02-17 | 1987-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987020694U JPS63129351U (en) | 1987-02-17 | 1987-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63129351U true JPS63129351U (en) | 1988-08-24 |
Family
ID=30816442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987020694U Pending JPS63129351U (en) | 1987-02-17 | 1987-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63129351U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57194660A (en) * | 1981-05-26 | 1982-11-30 | Hitachi Ltd | Telephone circuit switching device |
| JPS6076854A (en) * | 1983-10-03 | 1985-05-01 | Nec Corp | Data terminal device |
-
1987
- 1987-02-17 JP JP1987020694U patent/JPS63129351U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57194660A (en) * | 1981-05-26 | 1982-11-30 | Hitachi Ltd | Telephone circuit switching device |
| JPS6076854A (en) * | 1983-10-03 | 1985-05-01 | Nec Corp | Data terminal device |
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