JPH0252920B2 - - Google Patents
Info
- Publication number
- JPH0252920B2 JPH0252920B2 JP16967781A JP16967781A JPH0252920B2 JP H0252920 B2 JPH0252920 B2 JP H0252920B2 JP 16967781 A JP16967781 A JP 16967781A JP 16967781 A JP16967781 A JP 16967781A JP H0252920 B2 JPH0252920 B2 JP H0252920B2
- Authority
- JP
- Japan
- Prior art keywords
- unit
- subscriber
- circuit
- unbalanced
- balanced
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56169677A JPS5870675A (ja) | 1981-10-23 | 1981-10-23 | サ−ジ保護方式 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56169677A JPS5870675A (ja) | 1981-10-23 | 1981-10-23 | サ−ジ保護方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5870675A JPS5870675A (ja) | 1983-04-27 |
JPH0252920B2 true JPH0252920B2 (enrdf_load_stackoverflow) | 1990-11-15 |
Family
ID=15890854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56169677A Granted JPS5870675A (ja) | 1981-10-23 | 1981-10-23 | サ−ジ保護方式 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5870675A (enrdf_load_stackoverflow) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6123733U (ja) * | 1984-07-17 | 1986-02-12 | 日本電子株式会社 | トランジスタのスイツチング回路 |
WO2010087184A1 (ja) | 2009-01-29 | 2010-08-05 | パナソニック株式会社 | 差動伝送回路及びそれを備えた電子機器 |
-
1981
- 1981-10-23 JP JP56169677A patent/JPS5870675A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5870675A (ja) | 1983-04-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2119194A (en) | Coupling an electric signal to transmission lines | |
JP2897936B2 (ja) | 光アイソレータを使用するソリッドステート絶縁装置 | |
US3855430A (en) | Electronic hybrid circuit for two-wire to four-wire interconnection | |
JPS58114561A (ja) | 通信方式 | |
JPH0622340B2 (ja) | 回線インタフェース装置 | |
JPS63169865A (ja) | 有効インピーダンス・ライン・フイード回路 | |
US5719693A (en) | Power feeding system for an optical transmission system | |
US6205218B1 (en) | Extended feedback circuit for impedance matching and voltage isolation | |
JP2535573Y2 (ja) | インタフェース回路の過電圧保護回路装置 | |
JPH0252920B2 (enrdf_load_stackoverflow) | ||
US5612998A (en) | Integrated interface circuit for driving a subscriber line | |
JPS5976120A (ja) | 信号伝達装置におけるサ−ジ保護装置 | |
US4675774A (en) | Direct transfer trip apparatus for use with an active pilot wire communications channel | |
JPS5986951A (ja) | 電話設備 | |
JPS58501610A (ja) | 通信ラインのための検出回路 | |
CA1267966A (en) | Active pilot wire apparatus for electromechanical current differential relays | |
CA2008549C (en) | Information separation device | |
JP2912388B2 (ja) | 加入者回路 | |
JPH0670058A (ja) | 電気的分離を行う回路、方法及び装置 | |
US4554416A (en) | Low voltage two wire to four wire telephone circuit converter apparatus | |
US4253131A (en) | Repeater overload circuit | |
GB2042848A (en) | Line current feed and hybrid arrangement (system X) | |
US6366976B1 (en) | Device for connecting a subscriber to a bus line | |
JPH0449824B2 (enrdf_load_stackoverflow) | ||
JP3494468B2 (ja) | ハイブリッド回路及びこれを用いた装置 |