JPS5498105A - Howler tone transmission system - Google Patents
Howler tone transmission systemInfo
- Publication number
- JPS5498105A JPS5498105A JP496678A JP496678A JPS5498105A JP S5498105 A JPS5498105 A JP S5498105A JP 496678 A JP496678 A JP 496678A JP 496678 A JP496678 A JP 496678A JP S5498105 A JPS5498105 A JP S5498105A
- Authority
- JP
- Japan
- Prior art keywords
- howler tone
- switch
- circuit
- contact
- howler
- 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.)
- Pending
Links
Landscapes
- Devices For Supply Of Signal Current (AREA)
Abstract
PURPOSE: To perform howler tone transmission in the exchange including a channel switch where high-level signals cannot pass, by utilizing the transmission circuit of call signals, which operate the bell of a telephone set, to perform howler tone transmission.
CONSTITUTION: In case that call signals and howler tone are transmitted to 1a and 1b respectively, contact circuit 2a is switched by the control from control circuit 9 of an exchange, and call signals are transmitted to the subscriber's telephone set of input terminal 1a from call signal generator 8. Switch 6a corresponding to contact circuit 2a repeats to turn on and off; and when switch 6a is turned off, switch 6b is turned on by the control from control circuit 9, and further, switching contact 11 is switched to the howler tone generator 13 side by the operation of switch 12, and howler tone is transmitted from common signal line 10 to the subscriber's telephone set of input terminal 1b through contact 2b. As a result, howler tone transmission can be performed even if channel switches where high-level signals cannot pass are included.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP496678A JPS5498105A (en) | 1978-01-20 | 1978-01-20 | Howler tone transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP496678A JPS5498105A (en) | 1978-01-20 | 1978-01-20 | Howler tone transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5498105A true JPS5498105A (en) | 1979-08-02 |
Family
ID=11598320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP496678A Pending JPS5498105A (en) | 1978-01-20 | 1978-01-20 | Howler tone transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5498105A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS523318A (en) * | 1975-06-24 | 1977-01-11 | Nec Corp | Howler circuit |
-
1978
- 1978-01-20 JP JP496678A patent/JPS5498105A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS523318A (en) * | 1975-06-24 | 1977-01-11 | Nec Corp | Howler circuit |
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