JPS57201367A - Talking time display device - Google Patents
Talking time display deviceInfo
- Publication number
- JPS57201367A JPS57201367A JP8594781A JP8594781A JPS57201367A JP S57201367 A JPS57201367 A JP S57201367A JP 8594781 A JP8594781 A JP 8594781A JP 8594781 A JP8594781 A JP 8594781A JP S57201367 A JPS57201367 A JP S57201367A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- terminal
- subscriber
- transmitter
- receiver
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Meter Arrangements (AREA)
Abstract
PURPOSE:To measure a talking time, by detecting that the polarity of a trunk line has been inverted, and starting to count, in response to the other subscriber. CONSTITUTION:In a state that a calling subscriber has picked up a transmitter and receiver 11, a terminal 13 is negative and a terminal 14 is positive, but when a service line is connected to the other subscriber, and a called subscriber picks up its transmitter and receiver, the terminal 13 and the terminal 14 become positive and negative, respectively. As a result, since the base of a transistor 19 is cut off by a diode 31, its conduction is held, and a transistor 27 does not conduct. At this point, since the collector potential of the transistor 27 becomes high level, a clock counter 23 is triggered, and a service time is displayed on a display device 24. When the talking ends and the transmitter and receiver 11 is reset, the transistor 27 conducts again, and resets the clock counter 23. When a suitable time constant is provided to a resetting circuit, the time display can be confirmed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8594781A JPS57201367A (en) | 1981-06-03 | 1981-06-03 | Talking time display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8594781A JPS57201367A (en) | 1981-06-03 | 1981-06-03 | Talking time display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57201367A true JPS57201367A (en) | 1982-12-09 |
Family
ID=13872951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8594781A Pending JPS57201367A (en) | 1981-06-03 | 1981-06-03 | Talking time display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57201367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515559U (en) * | 1991-01-17 | 1993-02-26 | アンリツ株式会社 | Public telephone |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028910A (en) * | 1973-07-14 | 1975-03-24 | ||
| JPS5542480B2 (en) * | 1971-10-15 | 1980-10-30 |
-
1981
- 1981-06-03 JP JP8594781A patent/JPS57201367A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5542480B2 (en) * | 1971-10-15 | 1980-10-30 | ||
| JPS5028910A (en) * | 1973-07-14 | 1975-03-24 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515559U (en) * | 1991-01-17 | 1993-02-26 | アンリツ株式会社 | Public telephone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS57201367A (en) | Talking time display device | |
| BE590951A (en) | Telephone dial illumination device. | |
| GB877309A (en) | Improvements in and relating to an amplifier system for telephone fee counter | |
| GB1270783A (en) | Timer circuit for an automatic telephone answering apparatus | |
| JPS5564465A (en) | Automatic answering telephone set | |
| JPS53148307A (en) | Automatic answering telephone set | |
| JPS5451702A (en) | Automatic power supply cut-off circuit | |
| FR2324181A1 (en) | Telephone line loop detector - has resistor bridge and amplifier to/ operating state of line connected to determine exchange or switchboard | |
| JPS5368010A (en) | Ring trip circuit | |
| JPS5627542A (en) | Incoming display system | |
| JPS5588438A (en) | Portable radio unit | |
| JPS57181256A (en) | Automatic answering telephone set capable of being listened to remotely | |
| JPS56131290A (en) | Trunk line holding system | |
| JPS5590174A (en) | Multifunction telephone set | |
| JPS54146504A (en) | Selective calling device | |
| JPS52125213A (en) | Absence transfer system | |
| JPS6416169A (en) | Telephone set with call charge display function | |
| JPS55165062A (en) | Monitor circuit for ground connection of public telephone set | |
| JPS5387609A (en) | Automatic answering telephone | |
| JPS5585175A (en) | Channel display unit | |
| JPS55154869A (en) | Supervisory system for facsimile original length | |
| JPS5338204A (en) | Automatic sending device of pulsing signal | |
| JPS553229A (en) | Terminal unit for data communication | |
| FR2335115A1 (en) | Telephone line status detecting unit - has photocoupling device to detect whether line current is lower or greater than set value | |
| JPS54101208A (en) | Radio telephone set with timer |