JPS55162658A - Synchronizing system in push-button telephone unit - Google Patents
Synchronizing system in push-button telephone unitInfo
- Publication number
- JPS55162658A JPS55162658A JP7037579A JP7037579A JPS55162658A JP S55162658 A JPS55162658 A JP S55162658A JP 7037579 A JP7037579 A JP 7037579A JP 7037579 A JP7037579 A JP 7037579A JP S55162658 A JPS55162658 A JP S55162658A
- Authority
- JP
- Japan
- Prior art keywords
- main unit
- timing
- telephone set
- ans
- push
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Time-Division Multiplex Systems (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54070375A JPS5931274B2 (ja) | 1979-06-05 | 1979-06-05 | ボタン電話装置における同期方式 |
US06/151,733 US4314109A (en) | 1979-06-05 | 1980-05-20 | Synchronization system for key telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54070375A JPS5931274B2 (ja) | 1979-06-05 | 1979-06-05 | ボタン電話装置における同期方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55162658A true JPS55162658A (en) | 1980-12-18 |
JPS5931274B2 JPS5931274B2 (ja) | 1984-08-01 |
Family
ID=13429623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54070375A Expired JPS5931274B2 (ja) | 1979-06-05 | 1979-06-05 | ボタン電話装置における同期方式 |
Country Status (2)
Country | Link |
---|---|
US (1) | US4314109A (ja) |
JP (1) | JPS5931274B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6051319B2 (ja) * | 1979-07-30 | 1985-11-13 | 岩崎通信機株式会社 | ボタン電話装置における制御信号伝送方式 |
US4454383A (en) * | 1982-11-22 | 1984-06-12 | Bell Telephone Laboratories, Incorporated | Asynchronous data transmission method and circuitry |
SE435010B (sv) * | 1982-12-30 | 1984-08-27 | Ellemtel Utvecklings Ab | Sett och anordning i ett telekommunikationssystem for aktivering av organ fran vilolege till aktivt lege |
SE435011B (sv) * | 1982-12-30 | 1984-08-27 | Ellemtel Utvecklings Ab | Sett och anordning i ett telekommunikationssystem vid aktivering av abonnentterminaler |
US4727370A (en) * | 1985-12-17 | 1988-02-23 | Ampex Corporation | Method and system for synchronous handshake generation |
JP3967532B2 (ja) * | 2000-08-29 | 2007-08-29 | 株式会社東芝 | ディジタルボタン電話端末 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3938144A (en) * | 1973-11-28 | 1976-02-10 | Johnson Service Company | Digital multiplexing system remote scanning of a plurality of monitoring points |
JPS5838997B2 (ja) * | 1978-06-23 | 1983-08-26 | 株式会社田村電機製作所 | 信号送受方式 |
-
1979
- 1979-06-05 JP JP54070375A patent/JPS5931274B2/ja not_active Expired
-
1980
- 1980-05-20 US US06/151,733 patent/US4314109A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS5931274B2 (ja) | 1984-08-01 |
US4314109A (en) | 1982-02-02 |
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