JPS5560350A - Party-subscriber discrimination system of remote communication unit - Google Patents
Party-subscriber discrimination system of remote communication unitInfo
- Publication number
- JPS5560350A JPS5560350A JP13303378A JP13303378A JPS5560350A JP S5560350 A JPS5560350 A JP S5560350A JP 13303378 A JP13303378 A JP 13303378A JP 13303378 A JP13303378 A JP 13303378A JP S5560350 A JPS5560350 A JP S5560350A
- Authority
- JP
- Japan
- Prior art keywords
- subordinate
- tone
- telephone set
- signal
- radio wave
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
PURPOSE: To improve S/N while no tone signal is included in a carrier, by providing a communication line between master and subordinate stations by making a subordinate unit oscillate to generate a self-discrimination tone signal for a fixed time while a master unit decodes this signal.
CONSTITUTION: After the handset of a subordinate telepnone set is lifted, a tone discrimination radio wave is sent out from the subordinate telephone set for a certain time. On receiving this radio wave, a master telephone set generates a tone signal at terminal (b). Once discriminating its own subordinate telephone set, tone decoder 11 holds relay 5 inoperative. When arrival of the tone discrimination radio wave ends, relay 5 operates to close switching part 5-1 and also to turn power circuit 100 ON. Consequently, a sound signal from subordinate telephone set is transferred from transformer T2 to terminals A and B, signals from which are also transferred to the subordinate telephone set by way of transmitter 16. As a result, the tone signal is not superposed in a calling period, so that S/N will improve.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53133033A JPS5915225B2 (en) | 1978-10-28 | 1978-10-28 | remote communication equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53133033A JPS5915225B2 (en) | 1978-10-28 | 1978-10-28 | remote communication equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5560350A true JPS5560350A (en) | 1980-05-07 |
JPS5915225B2 JPS5915225B2 (en) | 1984-04-07 |
Family
ID=15095229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53133033A Expired JPS5915225B2 (en) | 1978-10-28 | 1978-10-28 | remote communication equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5915225B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5939559U (en) * | 1982-09-02 | 1984-03-13 | 三洋電機株式会社 | Wireless telephone charging circuit |
JPS60182228A (en) * | 1984-02-29 | 1985-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Radiotelephony equipment |
JPS6160547U (en) * | 1984-09-22 | 1986-04-23 | ||
JPS61208347A (en) * | 1985-03-12 | 1986-09-16 | Sanyo Electric Co Ltd | Cordless telephone set |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53145504A (en) * | 1977-05-25 | 1978-12-18 | Fujitsu Ltd | Cordless telephone equipment |
-
1978
- 1978-10-28 JP JP53133033A patent/JPS5915225B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53145504A (en) * | 1977-05-25 | 1978-12-18 | Fujitsu Ltd | Cordless telephone equipment |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5939559U (en) * | 1982-09-02 | 1984-03-13 | 三洋電機株式会社 | Wireless telephone charging circuit |
JPS60182228A (en) * | 1984-02-29 | 1985-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Radiotelephony equipment |
JPS6160547U (en) * | 1984-09-22 | 1986-04-23 | ||
JPS61208347A (en) * | 1985-03-12 | 1986-09-16 | Sanyo Electric Co Ltd | Cordless telephone set |
Also Published As
Publication number | Publication date |
---|---|
JPS5915225B2 (en) | 1984-04-07 |
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