JPH01256859A - Data terminal equipment - Google Patents

Abstract

PURPOSE:To attain data transmission and reception even if the power switch for the entire device is turned off by distinguishing a power supply into a standby power supply, a communication power supply and a main power supply and controlling the power supply from the communication power supply by an incoming signal from a telephone line or a command from a master control section. CONSTITUTION:When a CI signal being a call signal from the caller is detected by an incoming detection circuit 1, a photocoupler 2 is driven. Since a power supply Vcc1 is supplied to a resistor 16 at all times via a standby power supply 8 and pulled up, even when a main power switch 13 is turned off, an electric signal is obtained. Thus, a transistor(TR) 1 is driven, a relay contact 12 is thrown from the position (b) to the position (a), power of AC 100V is given to the communication power supply 15 externally and the communication power supply 15 outputs a power supply Vcc2. Thus, even when the power switch of the entire device is turned off, the data is received.

Description

[Detailed Description of the Invention] [Industrial Application Fields] This invention is applicable to telephone lines and private
The present invention relates to a data terminal device that connects to an extension (branchexchange) and performs data communication.

[Prior Art] A conventional device of this type is shown in FIG. FIG. 3 is a block diagram showing the configuration of a conventional data terminal device. In the figure, (1) is an incoming signal from a telephone line (C
(2) is a photocoupler for electrical isolation from the telephone line, (3) is a transformer for electrically separating direct current from the telephone line, and (4) is a modem/controller. The circuit performs mutual conversion between analog and digital signals, (5) is a resistor for pulling up the CI signal, (6) is the main control unit, (7) is the power supply, (10)
a) shows the entire communication processing section.

The communication processing section (10a) modulates the digital signal from the main control section (6) into an analog signal using the modem/control circuit (4) and sends it to the telephone line, and also modulates the modulated analog signal from the telephone line. It is demodulated by the modem/control circuit (4) so that it can be processed by the main control unit (6), and controls data communication and two outgoing and incoming calls to the telephone line.

Next, when there is an incoming call (to explain the operation of the device shown in FIG. 3), that is, a call from the telephone line, the incoming call detection circuit (1) detects a CI signal which is an incoming call signal, and this C
The photocoupler (2) is driven by the I signal, and the CI signal is sent out from the photocoupler (2). With this lever signal, the modem/control circuit (4) learns that there is an incoming call on the telephone line, and sends an answer tone to the other party (hereinafter referred to as the calling party) via the isolation transformer (3). At the same time, the main control unit (6) is notified of the incoming call.

After transmitting this answer tone, the modem/control circuit (4
) waits for a carrier signal to be sent from the calling side, and after receiving the carrier signal, receives data from the calling side, demodulates and converts this data, and transfers it to the main control unit (6). do.

When transferring data from the main control unit (6) to the telephone line,
That is, when this device becomes the calling side, the main control unit (6
) The modem/control circuit (4) makes a call to the telephone line in accordance with a command from the telephone line, and after detecting an answer tone from the other party, that is, the called party, transfers data.

[Problems to be Solved by the Invention] Since the conventional data terminal device as described above is configured as described above, the power supply device is used for both outgoing and incoming calls! (7) must be in the ON state to supply power to both the main control section (6) and the communication processing section (10a). Therefore, if you do not know when a call will arrive from the other party, always turn off the power switch for the entire device.
There was a problem in that it had to be kept in the N state and power was being supplied.

The present invention has been made to solve this problem, and an object of the present invention is to provide a data terminal device that can send and receive data even when the power switch of the entire device is in the OFF state.

[Means for Solving the Problems] The data terminal device according to the present invention distinguishes the power supply device that supplies power to the device into a standby power supply device, a communication section power supply device, and a main power supply device, and receives an incoming signal from a telephone line or The power supply from the communication section power supply device was controlled through a relay driven by a command from the main control section, and the contents of the data were stored in a backup memory at the time of outgoing and incoming calls.

[Function] In this invention, the power supply device that supplies power to the device is divided into a standby power supply device, a communication section power supply device, and a main power supply device, and a relay is driven by an incoming signal from a telephone line or a command from the main control section. Since we decided to control the power supply from the communication unit power supply through the communication unit, and to store the contents of the data in the backup memory when making and receiving calls, we were able to drive it with the minimum necessary power when making and receiving calls. , and enables unmanned operation and labor savings.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram 4 showing a part of the configuration of a data terminal device according to the present invention. In the figure, the same reference numerals as in FIG. 3 indicate the same or corresponding parts, and (10) is a communication processing section according to the present invention. be.

Fig. 2 is a block diagram showing the configuration of a power supply control unit used in a data terminal device, in which (8) is a standby power supply, (9) is a comparator, (11) is a relay coil, and (12) is a relay. (13) is the main power switch, (14) is the main power supply device, (15) is the communication section power supply device, and (20) is the entire power control section.

Furthermore, the resistor (R3) and the resistor (R4) are resistors for obtaining the reference voltage Vrefl from the power supply Vccl, and similarly, the resistor (R5) and the resistor (R6) are for obtaining the reference voltage Vref2 from the power supply Vcc2. The resistor (R7) is a resistor for pulling up the output of the comparator (9) to Vcc, 1.

In Figures 1 and 2, the standby power supply (8) always supplies the power supply vCC1 to the power supply control unit (20) and the resistor (16) that pulls up the CI signal, and also the communication unit power supply (15) is the power supply Vcc to the communication processing unit (10).
2, and is output when the relay contact (12) is connected to the a side by the relay coil (11). In addition, the main power supply device (14) has a main section (i.e., a main control section (6)
) and various peripheral devices (not shown in FIG. 1).

Next, the operation of the apparatus shown in FIGS. 1 and 2 will be explained. First, when receiving data, when the incoming call detection circuit (1) detects a CI signal, which is a call from the calling side, the incoming call detection circuit (1) drives the photocoupler (2) to detect the CI signal. Output. On the other hand, resistance (16)
Since the power supply Vccl is always supplied from the standby power supply (8) and pulled up, an electrical signal can be obtained even if the main power switch (13) is in the OFF state. CI from this photocoupler (2)
The signal is input to the base of the transistor (Tri) shown in Fig. 2 via the resistor (R1), and when the CI signal indicating the arrival of an incoming call becomes LOW (hereinafter referred to as "L"),
The voltage of Vccl is applied to the transistor (
What appeared at the base of the transistor (Tri) changes, and the transistor (Tri) is driven and turned on. When this transistor (Tri) is turned on, current flows through the bases of the transistor (Tr2) and the transistor (Tr3), and both the transistor (Tr2) and the transistor (Tr3) are turned on. Transistor (Tr
2) turns on, current flows through the relay coil (11),
The relay contact (12) switches from the b side to the a side, AC 100V power is input from the outside to the communication section power supply device (15), and the communication section power supply device (15) outputs power Vcc2. The output power Vcc2 is supplied to the communication processing unit (10
), and the communication processing unit (10) starts its operation.

This communication processing unit (10) is a conventional communication processing unit (10a).
) is substantially the same except that the incoming signal detection circuit of ) is removed and a backup memory (not shown) is added. Immediately after the communication processing unit (10) starts its operation, C1
POWER is a control signal for the power supply control unit (20).
Let the C0NT signal be rLJ. ,: ノPOWER
When the CONT signal becomes "L", the base of the transistor (Tr4) becomes close to the ground potential, and the transistor (Tr4) is turned off.

Here, when the power supply Vcc2 is not output,
Since there is no bias voltage at the base of the transistor (Tr4), the potential (Vre) of the + side terminal of the comparator (9)
f2) has a value close to the ground potential via the resistor (R6), while the - side terminal of the comparator (9) is connected to V
Since ccl is always output, the potential (Vref) determined by the resistance values of resistor (R3) and resistor (R4)
l ) is input, and the output of the comparator (9) is "L" because Vrefl > Vref2. Since the output of this comparator (9) is "L", the transistor (Tr5) is turned off. ing.

Here, when Vcc2 is output by the CI signal and the transistor (Tr3) is turned on, Vrefl < Vr
ef2 and the respective potentials are inverted, so that the output of the comparator (9) becomes r) (J, so the transistor (Tr5) drives ONL and the relay coil (11).This relay coil (11) ) is already driven by the transistor (Tr2), but by turning on the transistor (Tr5), CI
Even if the signal disappears, it will be self-maintained and data can be received. This received data is stored in a backup memory within the communication processing section (10).

When all the reception processing is completed, the communication processing unit (10) sets the POWERC0NT signal to rl (J) and outputs the POWE
When the RC0NT signal becomes rH, the CI signal becomes the same state as before the arrival, the condition of Vrefl>Vref2 is established, and the transistor (Tr5) is turned off. When this transistor (Tr5) turns OFF, the current flowing through the relay coil (11) stops, and the relay contact (12) switches from the a side to the b side, and the input power to the communication section power supply device (15) is turned off. The AC 100V power supply is stopped, and all operations return to the state before the arrival of the CI signal.

Next, the operation at the time of making a call will be explained.

After storing the data to be transmitted and the command data necessary for transmission from the main control unit (6) to the backup memory in the communication processing unit (10), even if the operator turns off the main power switch (13), Data transfer can be performed automatically even if the data is transferred automatically. That is, the communication processing section (10) is the main control section (
According to the command data stored in the memory received from 6), the POWERC0NT signal is set to "L" until all the data to be communicated is transferred to the intended party.
", and this PO1' sets the POWERC0NT signal to rH only when all data communications are completed.
CI
Similar to when a signal is received, the transistor (Tr4) is turned on, Vrefl > Vref2, the output of the comparator (9) becomes "L", the transistor (Tr5) becomes 0FFL, and the current flowing to the relay coil (11) is cut off. The relay contact (12) returns to the b side.

In addition, when both Vccl and Vcc2 are output, the CI signal is "H", and the POWERC0NT signal is rlJ, a resistor (R5
) and resistance (R6), and the ratio of resistance (R3) and resistance (R
4) By setting the ratio with
It becomes possible to control the relay coil (11) using only the ERCONT signal.

The power input to the relay contact (12) is AC10.
0■, but the output Vcc2 of the communication unit power supply device (15)
A relay contact may be provided to directly control the output system, or a relay contact may be provided not only to the input power of the communication section power supply (15) but also to the input section of the main power supply (14) at the same time. The same effects as in the embodiment are achieved.

[Effects of the Invention] As explained above, even if the power switch of the entire device is in the OFF state, when there is an incoming call on the telephone line, the present invention automatically turns on the power to the necessary parts for the necessary time. In addition, when transmitting data, it is possible to transmit data automatically even if the power switch of the entire device is turned off after completing a specified operation. It saves labor and can be operated with the minimum necessary power supply.

This is especially true when receiving calls without a driver, and when making calls when the other party is on the phone, or when transmitting the same data to several locations, i.e. when performing compatriot data communication. After the call is finished, the call can be made unmanned, which has the effect of freeing you from the hassle of operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing part of the configuration of a device according to the present invention, FIG. 2 is a block diagram showing the configuration of a power supply control section, and FIG. 3 is a block diagram showing the configuration of a conventional device. (1) is an incoming call detection circuit, (2) is a photocoupler, (3)
is a transformer, (6) is a main control section, (10) is a communication processing section, (8) is a standby power supply device, (14) is a main power supply device, and (20) is a power supply control section. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] Telephone lines and PBX (private branch
xchange) In a data terminal device that connects to an extension line and performs data communication, there is an incoming call detection circuit that detects an incoming call on the above telephone line, a standby power supply device that supplies power to this incoming call detection circuit, and a standby power supply that supplies power to this incoming call detection circuit, and a standby power supply that supplies power during data communication. A communication processing unit that has a backup memory to store the data, a communication unit power supply that supplies power to this communication processing unit, a main control unit that controls the entire device, and a main power switch that supplies power to this main control unit. a main power supply device having a main power supply unit, a power supply control unit that controls power supply from the communication unit power supply unit, and a power supply control unit that drives the power supply control unit according to an incoming call signal from the incoming call detection circuit to supply power from the communication unit power supply unit to the communication processing unit. means for supplying power to and storing the transferred data in the backup memory; means for transferring the data stored in the backup memory to the main control section when the main power switch is turned on; transfer from the main control section. Means for storing data to be transmitted and commands necessary for transmitting this data in the backup memory; the communication processing unit transmits the data according to the command, and when this is completed, drives the power supply control unit to A data terminal device comprising: means for stopping power supply from a communication unit power supply device.