JPS5555654A - Selection unit for telephone line - Google Patents
Selection unit for telephone lineInfo
- Publication number
- JPS5555654A JPS5555654A JP12907878A JP12907878A JPS5555654A JP S5555654 A JPS5555654 A JP S5555654A JP 12907878 A JP12907878 A JP 12907878A JP 12907878 A JP12907878 A JP 12907878A JP S5555654 A JPS5555654 A JP S5555654A
- Authority
- JP
- Japan
- Prior art keywords
- hook
- telephone set
- det2
- circuit
- during
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12907878A JPS5555654A (en) | 1978-10-20 | 1978-10-20 | Selection unit for telephone line |
US06/085,683 US4366347A (en) | 1978-10-20 | 1979-10-17 | Apparatus for selecting terminal equipment in telephone lines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12907878A JPS5555654A (en) | 1978-10-20 | 1978-10-20 | Selection unit for telephone line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5555654A true JPS5555654A (en) | 1980-04-23 |
JPS5755352B2 JPS5755352B2 (ja) | 1982-11-24 |
Family
ID=15000522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12907878A Granted JPS5555654A (en) | 1978-10-20 | 1978-10-20 | Selection unit for telephone line |
Country Status (2)
Country | Link |
---|---|
US (1) | US4366347A (ja) |
JP (1) | JPS5555654A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5748859A (en) * | 1980-09-08 | 1982-03-20 | Toshiba Corp | Network controller |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4421951A (en) * | 1981-09-24 | 1983-12-20 | Bell Telephone Laboratories, Incorporated | Method and arrangement for signaling the transmission mode of a communication system |
US4415774A (en) * | 1981-11-25 | 1983-11-15 | Universal Data Systems, Inc. | Line powered modem automatic answer device powered from equipment |
US4465903A (en) * | 1983-04-21 | 1984-08-14 | Ixo, Inc. | Electronic telephone interface circuit |
DE69026095T2 (de) * | 1990-12-05 | 1996-10-02 | Ibm | Kopplungseinrichtung zum Anschluss einer Datenübertragungs- anschu-einrichtung an verschiedene öffentliche Fernsprechwahlnetzen sowie eine Datenübertragungsanschlu-einrichtung und eine Arbeitsstation mit einer solchen Kopplungseinrichtung |
US5311587A (en) * | 1991-06-14 | 1994-05-10 | Murata Manufacturing Co., Ltd. | Sensor circuit for telephone line |
US10182145B1 (en) * | 2018-03-16 | 2019-01-15 | West Corporation | AC/DC phone line detector |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3414676A (en) * | 1965-07-19 | 1968-12-03 | Veron E. Long | Automatic interrogation system for utility meters and the like |
US4022977A (en) * | 1972-07-11 | 1977-05-10 | Mitsubishi Denki Kabushiki Kaisha | Automatic meter-reading and controlling system |
US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
-
1978
- 1978-10-20 JP JP12907878A patent/JPS5555654A/ja active Granted
-
1979
- 1979-10-17 US US06/085,683 patent/US4366347A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5748859A (en) * | 1980-09-08 | 1982-03-20 | Toshiba Corp | Network controller |
Also Published As
Publication number | Publication date |
---|---|
US4366347A (en) | 1982-12-28 |
JPS5755352B2 (ja) | 1982-11-24 |
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