JPS63144650A - Captain interface adaptor for public telephone set - Google Patents

Abstract

PURPOSE:To attain the Captain service by a telephone card or a coin by providing a changeover means to a backup power supply holding the connecting state of a public telephone set, a timer circuit and a pulse generating means. CONSTITUTION:In receiving the Captain service, a power switch 21 is turned on at first, a handset of a public telephone set 102 is hooked off and a telephone card or a coin is deposited. In this case, when the Captain changeover switch 35 is closed, a light emitting diode 5 is lighted and a photo transistor (TR) 5' is turned on, a control relay 2 is activated to change over the power supply to the backup power supply 38 supplying a stable DC and the telephone set loop circuit is held. Moreover, a timer circuit 22 is started by the operation of the relay 2 and when the set time elapses, an output is given, a light emitting diode 6 is lighted and a charging pulse is sent to the telephone set 102 via the photo TR 6' and a charging pulse generating control relay 3 or the like. Thus, the Captain service is offered effectively by using telephone card or the coin.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a captain interface for public telephones.
More specifically, in a system in which a captain (videotex) device and a public telephone are switched and connected to one communication line for communication, the adapter backs up the connection state of the public telephone when switching to the captain device,
This invention relates to a captain ink face adapter for public telephones that allows the public telephone to collect communication charges for the captain device at set times.

[Conventional technology]

The captain control circuit 201 is connected to the telephone line 202 via the NCU (M4 control unit) 203,
Captain's side (including television receiver 205, hard copy device 206, and keypad 27) and telephone 20
4 is switched by a changeover switch 208, and when the telephone line 202 is connected to the captain's side by the changeover switch, the message transmitted through the telephone line 202 is input to the communication processing unit 210 via the modem 209. . The communication processing unit 210 performs processing to extract a video signal from the message, and sends it to the video synthesis processing unit 212 via the output frame memory (code information, pattern information) 211, where video synthesis for display on a television is performed. It will be done. Note that the input unit 213 and the output unit 214 correspond to the keypad 207 for performing captain operations and the hard copy device W2O6 for outputting captain video information, respectively. The CPU 215 is a processing device that performs the above processing.

However, in such systems, the keypad 20
For example, if a digital line is used, billing information that can be received on the terminal cannot be effectively used as a service, and therefore the captain (Video Tex) It could not be applied at all to services such as connecting a credit card public telephone or the like to a line and quickly and accurately registering appropriate charges at each set time.

[Problem that the invention seeks to solve]

As mentioned above, according to the conventional technology, it is impossible to connect a card or a currency public telephone to the Captain (Video Tex) line and charge appropriately for the Captain service at each set time. There was a problem in that the Captain (Video Tex) service using telephone cards etc. was not possible.

The present invention solves the above-mentioned problems and provides a captain for public telephones that enables communication charges for the captain's service to be paid with a telephone card or money in a system in which the telephone line is switched between a public telephone and a captain device. - The purpose is to provide an interface adapter and enable captaining services in the form of telephone cards or coins.

[Means for solving problems]

According to the present invention, the above problem can be solved by using a system in which a communication line is switched between a public telephone and a captain's device, and communication charges for the captain's device are collected in the public telephone. a timer circuit that sends billing time information to the device at fixed time intervals; a pulse generating means that generates charge collection pulses to the public telephone at fixed time intervals based on the billing time information; means for switching the public telephone to a backup power source that maintains its connection state when switching from the public telephone to the captain device; and means for switching the communication line from the public telephone to the captain device; The present invention is solved by a captain interface adapter for a public telephone, which draws in the telephone and sends a charge collection pulse for the communication charge of the captain device to the public telephone.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

In the figure, 101 is a captain interface-adapter for public telephones according to the present invention, 102 is a card-type or coin-type public telephone, and 103 is a captain device.

In the quiescent state, telephone line 37 is routed through captain control circuit 36 to line 29 and interface adapter 10.
1, connected to public telephone 102 through line 32.

Raise the handset and insert a calling card or coin.

Then, the hook switch 39 is closed and a telephone loop circuit is configured, the loop circuit detection light emitting diode 4 emits light, and the light signal causes the phototransistor 4 to emit light.
' is turned on, the bias circuit of the switching transistor 11 of the control relay 1 that supplies power to the captain's device (resistor ?, 8.9 and capacitor 1.0 'J becomes conductive, and the control relay 1 operates, and its contacts 1' and 1'' are connected to the television receiver 43 in the captain's equipment W103.
Drive power is supplied from a 00VAC commercial power source 42.

Next, dial information is sent from the public telephone 102, a captain switching signal (bleep sound) is received in response to the center response, and when a switching button (not shown) is pressed in the captain control circuit 36, a line 37 (telephone line) is connected to an image (not shown). A switch is closed via the processing unit to line 45, and via line 30 the light emitting diode 5 in the interface adapter emits light and this light signal turns on the phototransistor 5'. This means that line 37 (telephone line) is captain device 1
When switching to the 03 side, the public phone Ja102 will be disconnected,
Since there is no current, the bias circuit (resistance 18, 19) of the switching transistor 20 of the control relay 2 that backs up this current is made conductive, the control relay 2 is operated, and its contacts 2 and 2 are switched. relay contact 3
The telephone loop circuit is maintained by a backup power supply 38 providing stable DC connected to the adapter 101 via ', 3/.

Next, the timer circuit 22 is activated when the contact 2//// is opened by the operation of the control relay 2, and outputs an output when the set time has elapsed, causing the light emitting diode 6 to emit light, and the light signal causes the phototransistor 6 to emit light. / becomes conductive, and the switching transistor 17 of the control relay 3 for generating charging pulses
bias circuit (resistors 12, 13, 14, capacitor 1
5) conducts through the closed contact 2'', and the control relay 3
make it work. In addition, 44.44', 44", 44"
is a three-terminal regulator for voltage stabilization. At this time, since the contact 3'/' is inserted into the timer circuit power supply circuit, once the control relay 3 operates, the self-contact 3 turns off the power supply to the timer circuit 22.
Disappear the output and turn off the light emitting diode 6,
The phototransistor 6, which is the light receiving element, is turned off, the transistor 1G is turned off, the relay 3 is restored, and the timing until the operation is restored is taken as a charging pulse.

Note that 17 is a power supply ground, 23 is a switching transistor, 24 is a resistor, 25 is a diode, and 26 is a capacitor.

Billing pulses are sent to the public telephone 102 through contacts 3,' and 3.
By changing the polarity of the telephone line 32, the public telephone 102 performs card subtraction or coin storage.

When the control relay 3 is restored, the timer circuit 22 starts counting again using the meter at the contact 3, and when the set time comes, repeats the same operation as described above.

Note that the light-emitting diode 4, the phototransistor 4', the light-emitting diode 5, the phototransistor 5', and the light-emitting diode 6 and the phototransistor 6' face each other to form a photocoupler. Although light emitting diodes and phototransistors are used for information detection as described above, the present invention is not limited to these, and various other devices can be used.

When the power switch 21 is turned on, the L light emitting diode 27 emits light through the resistor 28 to indicate that the backup power source 38 is turned on.

〔Effect of the invention〕

As explained above, according to the present invention, in a system that performs captain service etc. using a telephone line,
Even if the telephone side is disconnected during captain service, the central office line loop circuit (call circuit) can be backed up and the toll collection pulse can be sent.
This is very effective when providing the above services using various public telephones.

In addition, since it is a small, light tomb and is compact, it is easy to install, easy to work with, and economical.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional system in which a telephone line is switched between a telephone and a captain device.

101...Interface adapter, 102...
Public telephone, 103... Captain device, 1.2.3
...Relay, 1', 1"・2',2',22
・3.3'/,3''', 3...Relay 1 each
, 2.3 contacts, 4, 5. 6.27...Light emitting diode, 4'5'6'...Each light emitting diode 4
, 5.6 phototransistor of the light receiving element, ? , 8.
9.12, 13, 14.1B.

19.24.28...Resistance, 10.15.26...
Capacitor, ICl3゜20, 23...Transistor, 21...Power switch, 22...Timer circuit,
25...Diode, 29.30.31.32,33
,34,. 45... Line, 35... Captain changeover switch, 36... Captain control circuit, 37... Telephone line, 38... Back up power supply, 39... Hook switch, 40... Control circuit, 41...Telephone circuit, 42...100VAC commercial power supply, 43...Television receiver, 4/1. =14/, 44'', 44''
'...Three-terminal regulator patent applicant Nippon Telegraph and Telephone Corporation agent Patent attorney Todoroki Tama Kugobe (two others)

Claims (1)

[Claims] In a system in which a communication line is switched between a public telephone and a captain device, and communication charges for the captain device are collected at the public telephone, information on billing time for the captain device is collected at regular intervals. a timer circuit for transmitting a signal, a pulse generating means for generating a charge collection pulse for the public telephone at fixed time intervals based on the billing time information; and a means for switching the communication line to a backup power source that maintains the connected state, which is activated when switching the communication line from the public telephone to the captain device, connects the public telephone to the captain device, and connects the public telephone to the captain device. A captain interface adapter for public telephones, characterized in that it transmits a charge collection pulse for communication charges.