JPS5216906A - Local line state lamp display circuit in key-telephone device - Google Patents
Local line state lamp display circuit in key-telephone deviceInfo
- Publication number
- JPS5216906A JPS5216906A JP9208375A JP9208375A JPS5216906A JP S5216906 A JPS5216906 A JP S5216906A JP 9208375 A JP9208375 A JP 9208375A JP 9208375 A JP9208375 A JP 9208375A JP S5216906 A JPS5216906 A JP S5216906A
- Authority
- JP
- Japan
- Prior art keywords
- display circuit
- key
- line state
- lamp display
- local line
- 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
- 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
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
Abstract
PURPOSE:To provide a local line state lamp display circuit for reducing a number of lines as possible.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9208375A JPS5216906A (en) | 1975-07-30 | 1975-07-30 | Local line state lamp display circuit in key-telephone device |
US05/707,324 US4079212A (en) | 1975-07-23 | 1976-07-21 | Extension telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9208375A JPS5216906A (en) | 1975-07-30 | 1975-07-30 | Local line state lamp display circuit in key-telephone device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5216906A true JPS5216906A (en) | 1977-02-08 |
JPS5438001B2 JPS5438001B2 (en) | 1979-11-19 |
Family
ID=14044541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9208375A Granted JPS5216906A (en) | 1975-07-23 | 1975-07-30 | Local line state lamp display circuit in key-telephone device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5216906A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53111211A (en) * | 1977-03-10 | 1978-09-28 | Kanda Tsushin Kogyo Kk | Button telephone set |
-
1975
- 1975-07-30 JP JP9208375A patent/JPS5216906A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53111211A (en) * | 1977-03-10 | 1978-09-28 | Kanda Tsushin Kogyo Kk | Button telephone set |
JPS6133297B2 (en) * | 1977-03-10 | 1986-08-01 | Kanda Tsushin Kogyo Kk |
Also Published As
Publication number | Publication date |
---|---|
JPS5438001B2 (en) | 1979-11-19 |
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