JPH0785594B2 - Telephone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is capable of connecting a plurality of telephones to a single office line, and connects the telephone to an outside line connection for connecting the telephones to the office line. The external line / extension switching means for switching to any one of the connection states of the extension side connection connected to the line, and the holding means, and the holding function for the line call, the mutual call function between the telephones, and the call between the telephone and the line. The present invention relates to a telephone device having a function.

(B) Conventional Technique A conventional telephone device of this type will be described with reference to FIG.

In the figure, (1) is a telephone line connection terminal, which is connected to the office line through this connection terminal (1). (2) is a rectifier circuit, (3a) and (3b) are external / extension switching relays,
The output terminals of the rectifier circuit (2) are connected to the external contacts (P1) and (P3) of the switching relay, respectively.

In addition, the relay side (3a) (3b) extension side individual contacts (P2) (P
4) is connected to the call matrix circuit (6),
Further, the common contacts (q1) (q2) of the relays (3a) (3b) are connected to detection circuits (4a) (4b) that detect off-hook and pulse dial signals. This detection circuit (4a)
(4b) is configured to include a photo coupler, and when off-hook and pulse dial signals are detected,
A detection signal is derived to the arithmetic control means (5) via the lines (l1) and (l2). The arithmetic control means (5) is realized by a microcomputer or the like.

The detection circuits (4a) and (4b) are connected to the extension telephones (7a) and (7b) via the extension telephone connection terminals (6a) and (6b), respectively.

The call matrix circuit (6) is connected to the dial tone transmission circuit (8). Further, the call matrix circuit (6) is provided with extension side individual contacts (P) of the relay (3a).
Crosspoint (9) connecting 2) to dial tone transmission circuit (8) and extension side individual contact (P) of relay (3b)
Connect the crosspoint (10) that connects 4) to the dial tone transmission circuit (8), the extension-side individual contact (P2) of the relay (3a), and the extension-side individual contact (P4) of the relay (3b). It has cross points (11) and (12). ON / OFF of these cross points (9), (10), (11) and (12) and the cross points provided in the other communication matrix circuit (6) are controlled by the arithmetic control means. Further, the arithmetic control means (5) is a relay (3a)
It also controls the switching in (3b). Reference numeral (13) is a ringer detection circuit connected between the telephone line connection terminal (1) and the rectifier circuit (2), and supplies a detection signal to the arithmetic control means (5) when the ringer is detected. There is. (14) is a holding circuit that emits a holding sound, and is connected to the output terminal of the rectifier circuit (2) via a holding relay (15) controlled by the arithmetic control means (5). (16) is a relay (3a) (3b)
It is a DTMF signal detection circuit connected to the common contact (q1) (q2).

Next, the operation will be briefly described.

When the extension phones (7a) and (7b) are on-hook,
The relays (3a) and (3b) are connected to the extension-side individual contacts (P2) and (P4) by the arithmetic control means (5), and when the extension telephone (7a) is off-hook from such a state, the detection circuit ( 4a)
At the off-hook state, the detection signal is input to the arithmetic control means (5) through the line (l1).

The arithmetic control means (5) sets the cross point (9) of the call matrix circuit (6) to the ON state in response to the detection signal, and the dial tone from the dial tone transmitting circuit (8) is set to the extension telephone (7a). ).

After that, the dial signal from the extension telephone (7a) is monitored, and "0" indicating the outside line call request is displayed at the head of the dial signal.
When is detected, the relay (3a) is switched to the connection state with the outside line side contact (P1), and the extension telephone (7a) is connected to the office line.

On the other hand, when the extension telephone number is sent from the extension telephone (7a), it is detected by the detection circuit (4a) and input to the arithmetic control means (5). Thereby, the arithmetic control means (5)
Makes an extension call to the extension telephone (7b). When the extension telephone set (7b) is off-hook, the detection circuit (4b) detects it and inputs it to the arithmetic control means (5). The arithmetic control means (5) thereby turns on the cross points (11) and (12) of the call matrix circuit (6) to carry out the extension call. Further, when there is an incoming call from the central office line, the incoming call is detected by the ringer detection circuit (13) and the detection signal is supplied to the arithmetic control means (5). In response to the detection signal, the arithmetic control means (5) first supplies a ringer sound to the extension telephone, and when it is off-hook, the supply of the ringer sound is stopped and the detection circuits (4a) (4b) Detect which extension phones were taken off-hook. Next, the off-hook relay on the extension telephone side is switched to the contact on the outside line side, and the outside line communication becomes possible. When the hold button is operated, the hold relay (15) is closed, and the hold sound is sent to the station line.

(C) Problems to be Solved by the Invention According to the above-described conventional technology, it is possible to reliably achieve a call between telephones, a call between a telephone and a station line, and a hold of a station line call.

However, when an answering machine whose operation is controlled by a remote control signal such as a DTMF signal is connected as an extension telephone, the hold relay is closed by the remote control signal and a hold tone is undesirably sent to the station line. There was a fear that it would cause a malfunction.

(D) Means for Solving the Problems In view of the above points, the present invention is capable of connecting a plurality of telephones to a single office line, and connects the telephone to an outside line connection for connecting the telephones to the office line. An extension / extension switching means for switching to one of the connection states of the extension side connection connected to
A telephone device having a holding means for holding a line call holding function, a call function between the telephones, and a call function between the telephone and a line, and prohibiting reception of information about a connected telephone and a hold signal. It is characterized by further comprising: a means for storing a release code to be released; and a control means for controlling the holding function of the holding means based on the information about the telephone connected to the outside line and the release code.

(E) Operation According to the present invention, when the information about the telephone connected to the outside line indicates the telephone controlled by the control signal such as the DTME signal, the holding means operates by the control signal. However, no malfunction will occur.

(F) Embodiment FIG. 1 is a diagram showing a telephone device according to the present invention. The same parts as those in FIG. 3 are designated by the same reference numerals, and their explanations are omitted.

In FIG. 1, (17) is an extension telephone connection terminal (6b)
An answering machine connected to the telephone, (18) a RAM serving as a storage means for storing information about the connected telephone, (19) an input unit having a numeric keypad and function keys, (20)
Reference numerals a) and (20b) are relays connected between the detection circuits (4a) and (4b) and the extension telephone connection terminals (6a) and (6b), and are controlled by the arithmetic control means (5). Relay (20a) (20b)
The first contact (P5) (P7) is the detection circuit (4a) (4b) respectively
2nd contact (P6) (P8) to the ringer sound generation circuit (21) (22), and common contact (q3) (q4) to the extension telephone connection terminals (6a) (6b) respectively. It is connected.
(23) (24) are common contacts (3q) of relays (20a) (20b)
An off-hook detection circuit connected between (q4) and the extension telephone connection terminals (6a) and (6b) supplies a detection signal to the arithmetic control means (5) at the time of off-hook detection.

In order to write information to the RAM (18) according to the present invention having such a configuration, first, the registration / call switch (25) is closed to set the arithmetic control unit (5) to the registration mode, and then,
The telephone number controlled by the control signal composed of the DTMF signal (in this case, the answering machine) is input as the extension number connected as the extension telephone. After that, when a key that is not used for inputting an extension number or the like in the registration mode is operated, for example, a flash key for interrupt service, the arithmetic control means (5) accordingly responds to the RAM (corresponding to the extension number) 1
Store the flag "1" in the area of 8).

By the way, when the answering machine (17) has a call function, it is necessary to perform the hold function in the same manner as an ordinary phone during a call. Therefore, in the present invention, the release code is input to release the control of the holding operation.

Such registration of the release code is achieved by inputting the extension code after inputting the release code (for example, two digits) using the ten-key pad of the key input unit (19). In addition, such a release code is a RAM corresponding to the extension number as in the above flag.
It is stored in the area of (18).

Next, the operation will be described with reference to the flowchart shown in FIG.

Now, it is assumed that the registration / call switch (25) is opened and the arithmetic control means (5) is set to the call mode. In this state, when there is an incoming call from the central office line, such an incoming call is detected by the ringer detection circuit (13), and the ringer detection circuit (13) supplies a detection signal to the arithmetic control means (5).

The arithmetic control means (5) outputs the control signals (S ₁ ) (S ₂ ) in response to the detection signal to make the relays (20a) (20b) first.
The contact side is switched to the second contact side and at the same time a control signal is output to set the ringer sound generating circuits (21, 22) to the active state and call the extension telephone.

When the answering machine (17) is set to the off-hook state in response to such a call, the off-hook state is detected by the off-hook detecting circuit (24), and the off-hook detecting circuit (2) is detected.
4) supplies a detection signal to the arithmetic control means (5). The arithmetic control unit (5) determines the extension telephone set off-hook based on the detection signal. In addition, the relay (20a) (20
b) is supplied with the control signals (S ₁ ) (S ₂ ) to switch from the second contact side to the first contact side, and at the same time, the control signal is supplied to the relay (3b) so that the extension side individual contacts (P4) are connected to the outside line side. Individual contact (P
Switch to 2) and connect the line and the answering machine (17).

Then RAM (18) for the off-hook phone
It is determined whether the flag stored in "1" is "1" (step 4). In this case, since the answering machine (17) [that is, the flag "1"], the release code is input next. It is determined whether or not (step 5). At this time,
The DTMF signal supplied from the central line is RA
It is only determined whether or not the release code stored in M (18) matches. If the release code is not entered,
You can immediately proceed to step 9 and make a call. Further, as described above, since the arithmetic control means (5) judges only the input of the release code, there is no holding operation by the remote control signal (formed from the DTMF signal) from the station line, and Remote control of the answering machine (17) is also reliably achieved. During such a call operation, it is determined whether or not the device is on-hook (step 10). If the device is not on-hook, the process immediately returns to step 2 and the above procedure is repeated. After processing, that is, switching the relay (3b) to the individual contact (P3) on the extension side, the process returns to step 2.

On the other hand, since the call function of the answering machine is used, when the release code is input, the arithmetic control means (5) does not
The input of the DTMF signal is permitted, and it is determined whether or not there is a hold request (step 6). If there is a hold request, the process proceeds to step 7 and the hold operation is executed. The holding operation is
The holding relay (1
This is achieved by closing 5) and sending the hold tone from the hold circuit (14) to the office line, and continues until the hold release is determined in step 8. If it is determined in step 6 that there is no hold request or in step 8 that the hold is released, the process proceeds to step 9 and the call operation is performed as described above.

Next, when there is no incoming call from the outside line, when the extension telephone is off-hooked, the arithmetic control means (5) judges the off-hook state by the detection signal from the off-hook detection circuit (step 12).

Next, the arithmetic control means (5) judges the telephone number input from the extension telephone set off-hook, for example, the extension telephone set (7a), and if there is "0" at the beginning of the telephone number, it is determined that the call is an outside line (step 13). ). When making such an outside line, it is judged whether or not the other party has responded (step 14), and if it responds,
If it does not respond, it is judged whether it is on-hook (step 15). If it is not on-hook, the process returns to step 2. If it is on-hook, the on-hook process is executed in step 21, Return to step 2.

On the other hand, if there is no "0" at the beginning of the telephone number, it is determined that the call is an extension call, and if the other party answers, the extension call processing is executed (steps 13, 16, 19, 20). If there is no response to an extension call or an extension call is made, it is judged whether or not it is on-hook (step 21). If it is not on-hook, step 2 is performed. If it is on-hook, on-hook processing is performed at step 22. And then return to step 2.

If the telephone number is not entered, the dial tone from the dial tone transmission circuit (8) is sent to the off-hook extension telephone and the telephone number is entered (steps 13, 16, 17, 18). .

In the above embodiment, the case where an answering machine is connected as an extension telephone has been described, but it is needless to say that the invention can be applied to a case where a telephone having a format requesting input of a personal identification number (DTMF signal) at the time of incoming call is connected. .

(G) Effect of the Invention According to the present invention, the information about the extension telephone and the release code for releasing the prohibition of acceptance of the hold signal are stored, and the holding means based on the information about the telephone connected to the outside line and the release code. I tried to control the hold function of
For example, if you connect an answering machine as an extension telephone,
A malfunction that the hold operation is executed by the remote control signal composed of the DTMF signal is prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a flow chart showing the main part thereof, and FIG. 3 is a diagram showing a conventional example. (2) …… Rectifier circuit, (3a) (3b) …… Relay, (4a)
(4b) ... Detection circuit, (5) ... Operation control means, (6)
...... Call matrix circuit, (8) …… Dial tone transmission circuit, (13) …… Ringer detection circuit, (14) …… Hold circuit, (15) …… Hold relay, (17) …… Answering machine, ( 18) …… RAM, (19) …… Key input section, (25)…
… Registration / call switch.

Claims (3)

[Claims] 1. A plurality of telephones can be connected to a single station line, and the connection state is either one of an outside line connection for connecting the telephones to a station line and an extension side connection for mutually connecting the telephones. A telephone device having an outside / extension switching means for switching and a holding means, having a holding function for a line call, a call function between the telephones, and a call function between the telephone and a line, which relates to a connected telephone. It is characterized by further comprising means for storing a release code for releasing the reception prohibition of the information and the hold signal, and control means for controlling the hold function of the hold means based on the information on the telephone connected to the outside line and the release code. Telephone equipment. 2. The control means detects whether or not a release code is input when the information in the storage means relates to a telephone controlled by a control signal composed of a DTMF signal from an office line, The telephone device according to claim 1, wherein when the release code is not input, the holding operation by the DTMF signal is prohibited. 3. The control means is adapted to detect the presence or absence of the input of a release code when the information in the storage means relates to a telephone controlled by a control signal composed of a DTMF signal from an office line, The telephone according to claim 1, wherein when the release code is input, input of a DTMF signal from the office line is permitted, and when a hold request is made, a hold operation is executed. apparatus.