JPS63127650A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To obtain a communication terminal equipment to be easily used by the user by using a microcomputer so as to switch the connection automatically in matching with the state. CONSTITUTION:The microcomputer 10 detects an off-hook of a built-in telephone set or an off-hook of an external telephone set and when the off-hook is detected by the built-in telephone set, the connection state of contacts 31, 31a and contacts 32, 32a is attained and when off-hook is detected by the external telephone set 2, the connection state of contacts 31, 31b and contacts 32, 32b is attained for the talking. Even when a trunk line 1 is connected to a MODEM 9 to execute data communication, the external telephone set 2 or the built-in telephone set is hooked off on the necessity of emergency, the microcomputer 10 detects it and the dialing by the telephone set is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication terminal device configured to be able to perform telephone conversation and data communication using a public network.

[Conventional technology]

As a conventional device of this kind, there is, for example, a device described in the ``Hitachi, Modem, Telephone with built-in NCU'' supplementary manual published by Hitachi, Ltd. FIG. 4 is a block diagram showing this type of conventional equipment, in which (1) is a central office line connected to a remote office or exchange, (2) is an external extension telephone, and (3)
) indicates the terminal board, (4) indicates the main body of the telephone with a built-in modem, and (
5) is a disconnector built into the telephone with built-in modem (4). (5a) and (5b) of the separator (5).

(5c), (5a'), (5b'), and (5c') are contacts, and in the state shown in the figure, the contact piece (5a)
) and (5c) are connected, contacts (5a') and (5c') are connected respectively, and the central wire (1) is connected to the terminal Ll of the terminal board (3).
* Contact points (5a), (5a') between L2 and separator (5)
The reversal detection circuit (
6). Also, by shifting the position of the contact pieces from the position shown in the figure, the contacts (5b) and (5C) are connected to the contact (5b').
) and (5c'), the central line (1) is connected to the terminal board (3
) and is connected to the external telephone (2) via the disconnector (5),
The connection with the telephone main body (4) with a built-in modem is cut off.

Also, (7) is a relay, (7a), (7b), (7c
), (7a').

(7b') and (7c') are the contacts of the relay (7),
In this specification, each contact of the relay (7) is referred to as a first changeover switch (7a), (7a') is a modem terminal, and (7a) is a first changeover switch.
b) and (7b') are called 4 children for telephones. Also, (8) is a telephone circuit, (9) is a modem (MODEM), (10) is a reversal detection circuit (6), and a relay [71, '4 talk circuit (8)
), a microcomputer that controls the operation of the modem (9), (lla) a hook switch, and (12) a handset. 'Telephone circuit (8), hook switch (ll
a) The handset (12) is collectively referred to as a built-in telephone. (6a), (6b) = (6c), (6d), (6
e).

(sf), (6g), (6h) are inversion detection circuits (6
) terminal, (8a).

(8b) and (8c) are terminals of the telephone circuit (8), (9a)
, (9b), (9c) are terminals of modem (9), (10a
), (10b), (10c), (10d
).

(10e), (loi), (10j), and (10h) are terminals of the microcomputer (10). The connections between each terminal and contact are as shown in the diagram (5a)-(6a), (
5a') - (6a'), (6c) - (7c), (6d)
-(7c'), (7a)-(9b), (7a')-(7
a), (7b)-(lla)-(8b), (7b'
) − (8a) + (6e) − (10d), (6f
)-(10c).

(6g)-(10b), (6h)-(10a),
(8c)-(10i), (9c)-(10h). Also, (7c)-(7a), (7c'
)-(7a') is a data communication mode connection, and (7c)-(7b).

The connection (7c')-(7b') is a connection in telephone conversation mode using a built-in telephone.

The reversal detection circuit (6) indicates that the office line fil is connected to the other party's communication terminal device (not shown).
This circuit is provided to detect that the polarity of the upper signal voltage is reversed.

FIG. 5 is a circuit diagram showing the internal connections of the reversal detection circuit (6), in which the same symbols as in FIG. 4 indicate the same parts, (13) is a relay, (13a), (13b), ( 13
c).

(13a'), (13b'), (13c') are relays (
The contacts 13), (14) and (15) are Zener diodes, and (16) and (17), respectively.

(18) are resistors, (19) and (20) are photocouplers, (21) and (22) are light emitting diodes, and (23) t14) are phototransistors. In this circuit, Zener diode (14), (
The parallel circuit of the resistor (15) and the resistor (16) is connected to the resistor (18).
) and acts to reduce voltage drop.

When the reversal detection circuit (6) is connected by the relay (13) as shown in FIG. 5, that is, (13b)-
When connecting (13c), (1,3b')-(13c'), if (6b) is the positive electrode and (6a) is the negative electrode, (6b)
→(18) -+(13b-+ (13c')
−+(21) →(6d)−+f81 (or (9)
, see Figure 4) A magnetic current flows through the circuit (6c) and (6a), causing the light-emitting diode (21) to emit light, turning on the phototransistor (24), and changing (6f) to (6g). Since the connection is made, this is detected via (10c) and (10b) of the microcomputer (1O). Also (6a
) is the positive electrode and (6b is the negative electrode, (6a ) −+(
6c )-+f81 (or 191) → (6d) →
(22) −+ (13c') −+ (13b')
Be18) −+ Current flows through the circuit of (6b), the light emitting diode (22) emits light, the phototransistor (23) turns on, and connects (6e) to (6g), so
This is (10d) of the microcomputer (10), (
10b).

Next, operate the relay (13) and connect the relay contacts (13a)-(13c), (13a')-(13c')
Then, when (6a) is the positive electrode and (6b) is the negative electrode, (6a
) → (17) −+ (13a') → (13c')
→(21) −+ (13c) −+ (13a) −
+ (6b) flows, causing the light emitting diode (21) to emit light and turning on the phototransistor (24). Also, if (6a) is the negative electrode and (6b) is the positive electrode, (6b)
−+ (13a) −+ (13c)→(22)−+
(13c')-+ (13a')-+ (17)-+
A current (6a) flows, causing the light emitting diode (22) to emit light and turning on the phototransistor (23).

Through the above operations, the microcomputer (10)
Now let's look at the state of the relay (13) and the terminals (10c) and (10d).
), it can be determined which of the terminals (6a) and (6b) is the positive terminal, and it can be determined whether the other party's communication terminal device has gone off-hook.

Next, the operation when the apparatus shown in FIG. 4 operates in data communication mode will be described. FIG. 6 is a flowchart showing the operation of the apparatus shown in FIG.
(53) represents each program step. When operating as a communication terminal device for transmitting data communications, the hook switch (lla) is activated when the handset (12) is off-hook.
is on, so (7c) - (7b), (7c')
- A dial signal for calling the other party's communication terminal device is sent from the telephone circuit (8) in the connected state (7b') (step (40)). Next, drive the relay (7).
)-(7a) and (7c')-(7a) (step (41)). In step (42), a value nl is set in a register named timer T, and (42
) → (43) → (44) → (46] → (43) If the time corresponding to nl, that is, the unit time (using a lock signal as appropriate) is TO, then To x (
The inversion detection circuit (6) detects whether the signal on the station line 111 is inverted during the period (nl). That is, from the time of step (42), reversal detection (
43), and if there is a reversal, go to step (45), and if there is no reversal, subtract 1 from the contents of timer T (Ste knob (44)) and invert until the contents of timer T become 0. Detection (43) is repeated, and if the contents of timer T become 0, the communication terminal device of the other party is not connected within the Tox (nl) time (the other party is busy, or the other party is connected in manual reception mode). It is determined that the operator is absent, etc.), and the process goes to step (52), returns the relay (7), and returns (step (53)). Tox(nl)
If reversal is detected within this time, the process moves to step (45).

Also, when operating as a communication terminal device for receiving data communication, a calling signal at the terminal (8C) of the telephone circuit (8) is inputted from the terminal (10i) to the microcomputer (lO), and is an incoming call to the device. If this is detected, step (54) (same as step (41)) is followed by step (45). (5) → (47) → (49) −+
(50) −+ By the step of (47), TOX(
n2) Determine whether a carrier from the other party is detected within the time (whether the other party is connected in data communication mode), and if the carrier is detected, step (48)
If the carrier is not detected, it is determined that the other party is not connected in data communication mode and data communication is not possible, and the process proceeds from step (50) to step (52).

If the determination in step (47) is YES, step (48)
) and executes data communication until the communication ends (step (51)).

[Problem that the invention seeks to solve]

Since the conventional device is configured as described above, the selection of whether to use the built-in telephone or the external telephone (2) is determined by the connection of the disconnector (5), and this connection is manually operated. Because this is converted by There was a problem.

This invention was made to solve the above-mentioned problems, and allows the user to freely select the phone to use under any circumstances, and also allows the user to interrupt data communication and switch off the phone if necessary. I made it possible to use it.

[Means for solving problems]

In this invention, the operating status of the built-in telephone and the external telephone is monitored by a microcomputer, and the switching between the built-in telephone and the external telephone is also controlled by the microcomputer, so that the user can select which telephone to use. made it easy to do.

[Effect]

According to the present invention, it is possible to have a telephone conversation, even during data communication, by picking up the handset of the built-in telephone or external telephone (going off-hook) and turning on the hook switch.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention.
In the figure, the same reference numerals as in FIG. 4 indicate the same or corresponding parts, and they operate in the same way. In addition, (llb) is a hook switch connected to (lla), and is referred to as a second hook switch in this specification, and (30) is a relay (31), (31a), (31b). ), (32), (32
a), (32b), (33).

(33a), (34), (34a), (3
5) and (35a) are the contacts of the relay (30).

In this specification, (31), (31a), (31b)
.

(32), (32a), and (32b) are called second changeover switches, and (33), (33a), and (34
), (34a) is called a third changeover switch. (36)
is a resistor, (37) is a photocoupler, (37X) is a phototransistor of the photocoupler (37), (38) is a DC power supply,
(39) is a light emitting diode of the photocoupler (37). In this Mei #I book, a photocoupler (37) and a DC' power supply (
38) is called a switch state detection circuit. The hook switch (llb) is connected to terminals (10f) and (10g) of the microcomputer (10), and whether the handset (12) is on-hook or off-hook is determined by the microcomputer (10).
10). The phototransistor (37x) is connected to the terminal (
lop), (10q), contact (35),
(35a) is the terminal (1) of the microcomputer (10).
0m), (Ion), and the relay (30) is connected to the terminal (10t) of the microcomputer (10).

The handset (12) of the built-in telephone is on-hook (the hook switches (lla) and (llb) are in the off state) and the terminals (10f) and (10g) are in the cut-off state, and the handset (12) is in the cut-off state. When off-hook, terminals (10f) and (10g) are short-circuited. Also,
When the external telephone (2) is on-hook (38) →
(33a)−+(33)−+(L3)−+t21−+(
L4)-+(34)-+(34a)-+(36)→(3
Since the circuit from 9) to (38) is broken in the external telephone (2), the light emitting diode (39) does not emit light and the phototransistor (37x) is in an off state, but the external telephone (2)
When off-hook, the above circuit is connected, a magnetic current flows through the light emitting diode (39), it emits light, and the phototransistor (37x) is turned on.

Turning around, the microcomputer (10) is connected to the terminal (1
0f), (10g) and (10p), (10(1
) can detect off-hook of the built-in telephone or the external telephone (2).

The operation of the apparatus shown in FIG. 1 will be explained below.

2 and 3 are flowcharts showing the operation of the apparatus shown in FIG. 1. In these drawings, (48) is a step corresponding to the same reference numeral in FIG.
80) are each step.

In steps (60) and (61) in FIG. 2, the microcomputer (lO) detects off-hook of the built-in telephone or off-footer of the external telephone, and when off-hook is detected in the built-in telephone, steps (62) and (65) are performed. Accordingly, (3
1) -(31a), (32) -(32a) are connected, and when off-hook is detected in external telephone (2), (31) -(
31b), (32)-(32b) are connected, and calls are made in steps (66) and (67), respectively.
In the case of a call in step (66), the call state continues until on-hook of the built-in telephone is detected by the determination in step (69), and in the case of a call in step (67), reversal is detected by the determination in step (68). When the reversal is detected, the relay (30) is restored to the connection of (31) - (31a) and (32) - (32a), and then the process returns to step (60). .

Also, in the apparatus of the present invention, the operation related to data communication is as shown in FIG. 6, but the operation related to status monitoring of the external telephone (2) and the built-in telephone in the data communication state is as shown in FIG. That is, when a carrier is detected in the determination of step (47) in FIG.
a) , (32) - (32a) and at terminal (Ion), (10n) (35) - (35
a)) Perform the data communication in step (48), and the external telephone (2) is also connected to the internal 'i1. While the telephone is also kept on-hook, data communication (48) is repeated until it is determined in step (76) that data communication has ended. If off-hook of external telephone (2) is detected in step (73) (terminal (101) of microcomputer (10)), relay (7
) off and (7c)-(7b), (7c'-7b'
), and step (75)), and step (
81) to drive the relay (30).
1b), (32) - (32b), and then step (67) is entered from ■ in FIG. Also step (
If off-hook of the built-in telephone handset (12) is detected in step 74) (detected at terminals (10f) and (10g) of the microcomputer (10)), step (77)
Turn off relay (7) at (7c) - (7b).

After establishing the connection (7c')-(7b'), step (66) is entered from point 0 in FIG.

As mentioned above, even if the central office line (1) is connected to the modem (9) and data communication is being performed, there is an urgent need to connect the external telephone or built-in telephone to the microcomputer (lO). is step (73) in Figure 3.
, as shown in (74), this is detected, and the process goes through points ■ and ■ in FIGS. 3 and 2 to step (66).

As shown in (67), it becomes possible to make dial calls by telephone.

In the above embodiments, the present invention has been described with respect to a communication terminal device that has a built-in modem and is capable of telephone conversation and data communication, but the present invention can also be applied to adding an external telephone to an ordinary telephone. can do.

〔Effect of the invention〕

As described above, according to the present invention, since both the external packing machine and the built-in telephone are monitored by a microcomputer and automatically switched back according to their conditions, it is possible to obtain a communication terminal device that is easy for the user to use. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are flow charts showing the operation of the device shown in FIG. 1, FIG. 4 is a block diagram showing a conventional device, and FIG. Fourth
FIG. 6 is a circuit diagram showing the internal connections of the inversion detection circuit shown in the figure, and FIG. 6 is a flowchart showing the operation of the device shown in FIG. 4. (1) is the office line, (2) is the external telephone, (3) is the terminal board,
(6) is an inversion detection circuit, (7a), (7b), (7c)
, (7a'), <7b'). (7c') is the first changeover switch, 18), (ll
a), (12) are built-in telephones, (llb) is a second hook switch, (9) is a modem, (io) is a microcomputer, (31), (31a), (31b)
, (32), (32a), (32b) are second changeover switches, (33), (33a), (34)
. (34a) is the third changeover switch, (36), (37)
=(38) is a switch state detection circuit. Note that the same reference numerals in each figure indicate the same or similar parts.

Claims (2)

[Claims] (1) A communication terminal device that is equipped with a built-in telephone, a modem, and a microcomputer that controls the built-in telephone and the modem, and that performs telephone conversation and data communication with the other party's communication terminal, An external telephone added outside the communication terminal device to perform similar functions, and a first telephone connected by switching the office line to a modem terminal or a telephone terminal via a reversal detection circuit under the control of the microcomputer. a changeover switch; a second changeover switch that switches and connects the telephone terminal to the built-in telephone or the external telephone under control of the microcomputer; a second changeover switch that connects the telephone terminal to the external telephone in conjunction with the second changeover switch; a third changeover switch for connecting a switch state detection circuit for detecting the state of the hook switch of the external telephone when the external telephone is not connected; means for monitoring the state of the hook switch of the built-in telephone and the external telephone by the microcomputer; In preparation, when the built-in telephone or the external telephone goes off-hook, the microcomputer detects this, regardless of whether or not the communication terminal device is performing data communication with the other party's communication terminal device. A communication terminal device characterized in that the connection by the first and second changeover switches is controlled by the microcomputer so that a dial call can be made using an off-hook telephone. (2) The means for monitoring the hook status of the built-in telephone and the external telephone by a microcomputer includes a second hook switch that operates in conjunction with the hook switch of the built-in telephone, and the impedance between terminals of the second hook switch. means for monitoring by the microcomputer, and a third changeover switch connects the switch state detection circuit to the external telephone, and when the external telephone is off-hook, direct current flows from the switch state detection circuit to the external telephone. Claim 1, characterized by comprising means for monitoring current with the microcomputer.
Communication terminal device described in Section 1.