JP2863156B2 - Line switching device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line switching device for selectively switching a telephone line between a telephone and a data communication device. 2. Description of the Related Art Conventionally, for example, when one telephone line is shared by a telephone and a data communication device such as a facsimile device, when a call from a human is detected, a buzzer of the facsimile device is turned off. It was sounded to notify the operator of the incoming call. [0003] However, in such a conventional apparatus, for example, when a telephone is installed near an operator and a facsimile apparatus is installed at a position where the operator wants to be away from the operator, the facsimile apparatus cannot be used. In some cases, the buzzer-on cannot be sufficiently heard by the operator, and the operator cannot recognize the incoming call notification. [0004] Further, since a notification sound for notifying that the telephone is used is generated from the facsimile machine, there is a case where an inconvenience that an operator feels strange is caused. The present invention has been made in view of such circumstances, and when one telephone line is shared by a telephone and a data communication device, the telephone can be used appropriately when the called party is not the data communication device. It is an object of the present invention to provide such a line switching device. SUMMARY OF THE INVENTION The present invention is a call signal detecting means for detecting a call signal on a telephone line in a line switching device for selectively switching and connecting a telephone line to a telephone and a data terminal device. Closing means for connecting the data communication device to the telephone line, switching means for connecting the telephone to the telephone line, and line closing detecting means for detecting the formation of a DC loop due to the closing of the telephone line A destination terminal determining means for determining whether or not the destination terminal is a corresponding data communication device; a calling signal generating means for generating a calling signal; and when the telephone is released from the telephone line by the switching means. Off-hook detecting means for supplying DC power to the telephone and detecting the hook state, and after detecting a call signal, closes the telephone line and sets the DC loop by the line closing detecting means. When the formation is confirmed, the type of the partner terminal is determined by the partner terminal determining means in a state where the telephone is released from the telephone line, and if the determination result is other than the corresponding data communication device, the generated call signal is transmitted to the telephone. When the off-hook detecting means detects that the telephone has gone off-hook, the switching means connects the telephone to the telephone line and then closes the data communication device which has been closed to the closing means. On the other hand, the telephone line is released from the telephone line, and when the result of the determination is the corresponding data communication device, the telephone line is kept connected to the data communication device. Also, in a line switching device for selectively switching and connecting a telephone line to a telephone and a data terminal device, a call signal detecting means for detecting a call signal on the telephone line, and a closing device for connecting the data communication device to the telephone line. Connection means, switching means for connecting the telephone to the telephone line, line connection detection means for detecting the formation of a DC loop by closing the telephone line, and whether or not the other terminal is a corresponding data communication device. DC terminal power supply from the data terminal device to the telephone set when the telephone set is released from the telephone line by the switching means. And off-hook detecting means for detecting the hook state. After detecting the call signal, the telephone line is closed and when the formation of the DC loop is confirmed by the line closing detecting means, In the state where the telephone is released from the terminal, the type of the partner terminal is determined by the partner terminal determining means. If the determination result is other than the corresponding data communication device, the generated calling signal is output to the telephone, and the off-hook is output. If the detecting means detects that the telephone has gone off-hook, the switching means connects the telephone to the telephone line and then releases the closed data communication device from the telephone line via the closing means. On the other hand, when the result of the determination is a corresponding data communication device, the telephone line is kept connected to the data communication device. When a predetermined instruction operation is performed after the telephone is connected to the telephone line, the data terminal device is connected to the telephone line by the closing means, and the communication operation of the data terminal device is performed. BRIEF DESCRIPTION OF THE DRAWINGS [0007] FIG.
An embodiment of the present invention will be described in detail. FIG. 1 shows a line switching apparatus according to an embodiment of the present invention. In this case, one telephone line is shared by the telephone and the facsimile machine. Further, since the present invention relates to reception, a description of functions and operations at the time of transmission is omitted. In FIG. 1, one of a pair of telephone lines is
A switch 4 connected to one input terminal of a primary side of a transformer 2 via a contact 1 and switching a connection destination of the telephone 3
One input terminal of one of the switching terminals and a ringing signal detector 5
Is connected to one input terminal. The other end of the telephone line is connected via an off-hook detector 6 to another input terminal on the primary side of the transformer 2 and to a switch 4.
The other input terminal of one of the switching terminals and the ringing signal detector 5
Is connected to the other input terminal. The secondary side of the transformer 2 is connected to the common input terminal of the switch 7, one of the switch terminals is connected to the primary input side of the modem 8, and the other switch terminal is connected to the voice response device 9.
Connected to each other. One input terminal of the other switching terminal of the switching device 4 is connected to one output terminal of a ringing signal generator 11 via a capacitor 10, and secondary DC power is supplied by an off-hook detector 12. The other input terminal of the other switch terminal of the switch 4 is connected to the other output terminal of the call signal generator 11 and is grounded. The call signal detector 5 is for detecting a call signal on the telephone line, and the detection signal DD1 is provided.
Are output to the control unit 13. The off-hook detector 6 detects that the contact 1 has been closed, a DC loop of the telephone line has been formed, and an off-hook state has been detected. Has been output. The modem 8 is for exchanging digital data using a telephone line, and its secondary input side is connected to the facsimile machine 14. The voice response device 9 is used for voice response to an incoming response message such as, for example, "This line is connected to a facsimile device. If you want to talk, please wait for a while." . The call signal generator 11 is for generating a call signal to be output to the telephone 3. The off-hook detector 12 detects that the telephone 3 has gone off-hook, and the detection signal DD 3 is output to the control unit 13. The secondary DC power supplied from the off-hook detector 12 to the telephone 3 is obtained from the facsimile machine 14. The control unit 13 controls the line switching device, controls the contacts 1, the switches 4 and 7, the voice response device 9, and the call signal generator 11 as appropriate, and controls the facsimile device 14 And predetermined information is exchanged. With the above configuration, the control unit 13 performs the processing shown in FIG. That is, first, the contact 1 is opened, the switch 4 is switched to the call signal generator 11, and the switch 7 is switched to the voice response device 9 (process 101).
It waits until the call signal detector 5 detects the call signal (NO loop of the judgment 102). When the detection signal DD1 is output from the call signal detector 5 and the result of the judgment 102 is YES, the contact 1 is closed to close the DC circuit of the telephone line, and the off-hook detector 6 detects the detection signal DD2. Is output to confirm that the DC circuit is closed, the voice response device 9 is activated to respond to the incoming response message by voice (process 103). When the voice response to the incoming call response message is completed, the switch 7 is switched to the modem 8, and the facsimile apparatus 14 is notified of the incoming call detection (step 104). Accordingly, the facsimile machine 14 starts a predetermined facsimile transmission procedure process. At this time,
The facsimile device 14 notifies the control unit 13 that the partner device is a facsimile terminal device when a predetermined procedure signal can be received from the partner device, and when the predetermined procedure signal cannot be received from the partner device. Notifies the control unit 13 that the partner device is not a facsimile terminal device. On the other hand, after the process 104, the control unit 13 waits for a response from the facsimile device 14 to the identification result of the partner terminal device (NO loop in decision 105). It is checked whether or not the partner device is a facsimile device based on the content of the response (decision 106). If the result of determination 106 is NO, it is determined that there is an incoming call from a device other than the facsimile machine, that is, from the telephone terminal, and the call signal generator 11 is activated (processing 10).
7) Wait until the off-hook detector 12 detects the off-hook of the telephone 3 (NO loop of the judgment 108). As a result, a ringing signal is generated from the ringing signal generator 11, and the ringing signal is applied to the telephone 3 via the switch 4, whereby the ringer of the telephone 3 rings. When the operator who hears the ringer of the telephone 3 picks up the handset of the telephone 3, a DC circuit is formed inside the telephone 3, so that the off-hook detector 12 detects the off-hook and detects the detection signal DD3. Is output. As a result, the result of the determination 108 becomes YES, so that the switch 1 is switched to the telephone line side, the contact 1 is opened, and the telephone 3 is set in a state where a telephone call is possible (process 109). Then, it is monitored whether the telephone 3 goes on-hook or the reception start is notified from the facsimile machine 14 (NO loop of the judgments 110 and 111). When the result of the determination 110 is YES, since the use of the telephone 3 has been completed, the contacts 1 and the switches 4 and 7 are restored to the initial state (step 11).
2), this process ends. After the end of the call with the other party, the operator operates the facsimile apparatus 14 to start facsimile reception.
Command the start of the receiving operation to the facsimile machine 14
Notifies the control unit 13 of the start of reception. When the result of the determination 111 is YES, the control unit 13 closes the contact 1 and connects the switch 4 to the calling signal generator 11 side, and the facsimile apparatus 14 uses the telephone line. It is set to a possible state (process 113). At this point, the switch 7 has been switched to the modem 8 side. Then, it waits until the end of the receiving operation is notified from the facsimile machine 14 (NO loop of decision 114), and when the result of decision 114 becomes YES, the contact 1 of the facsimile machine 14 and the switches 4 and 7 are operated. The process is restored to the initial state (process 115), and this process ends. If the result of the determination 106 is YES, the process branches to an immediate determination 114, and the facsimile machine 1
4 until the end of the receiving operation is notified. As described above, in this embodiment, when a call is received from a facsimile apparatus, a telephone line can be connected to the facsimile apparatus without ringing. Also, when a call is received from the telephone terminal, the ringer of the telephone 3 rings,
The ringing tone is reliably recognized by the operator. In addition, since the ringer of the telephone 3 used by the operator for the telephone call rings, it is possible to avoid a situation in which the operator feels uncomfortable with being called. In the above-described embodiment, whether the partner device is the same as the data communication device provided in the terminal is determined by using the transmission control procedure function of the data communication device. However, other means can be used as the determination means. For example, when a person uses a telephone terminal,
Equipped with a voice recognition device for identifying a word such as "Hello" emitted immediately after recognizing the connection with the partner terminal, and when the word is received within a predetermined period immediately after receiving a call, the partner device is determined to be a telephone terminal be able to. When a person uses a telephone terminal, he or she usually speaks a word immediately after the other party comes out.
It can also be determined that the partner device is other than a telephone terminal. In the above-described embodiment, a facsimile device is connected as a data communication device. However, other data communication devices, such as a Japanese word processor,
The present invention can be applied to a case where a Japanese teletex or a personal computer is connected. Further, the present invention can be applied to a case where two or more data communication devices are connected. As described above, according to the present invention,
In a line switching device for selectively switching and connecting a telephone line to a telephone and a data terminal device, a call signal detecting means for detecting a call signal on the telephone line, and a closing means for connecting the data communication device to the telephone line. Switching means for connecting the telephone to the telephone line, line closing detection means for detecting the formation of a DC loop due to the closing of the telephone line, and whether or not the other terminal is a corresponding data communication device. DC terminal is supplied to the telephone when the telephone is released from the telephone line by the switching means, and the hook state is determined. It is provided with off-hook detecting means for detecting, after detecting a call signal, closing the telephone line and confirming the formation of a DC loop by the line closing detecting means, the telephone is released from the telephone line. The type of the partner terminal is determined by the partner terminal determining means, and when the determination result is other than the corresponding data communication device, the generated call signal is output to the telephone, and the telephone is off-hook by the off-hook detecting means When it is detected that the telephone device is connected to the telephone line by the switching means, the closed data communication device is released from the telephone line via the closing means, and the determination result corresponds to the data communication device. In the case of a data communication device, the telephone line is maintained connected to the data communication device, so when an incoming call is received, the telephone line or the data communication device can be connected with the telephone line securely closed. An effect is obtained that the switching operation of the telephone line can be reliably performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a line switching device according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating an example of a process performed by a control unit. [Description of Signs] 1 Contact 3 Telephone 4, 7 Switch 9 Voice response device 11 Call signal generator 12 Off-hook detector 13 Control unit 14 Facsimile machine

Continuation of the front page (56) References JP-A-52-139302 (JP, A) JP-A-62-39950 (JP, A) JP-A-60-120648 (JP, A) JP-A-61-121560 (JP, A) JP-A-62-35758 (JP, A) JP-A-59-25466 (JP, A) JP-A-51-71004 (JP, A) JP-A-49-98503 (JP, A) 60-203059 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 11/00-11/10 H04N 1/32-1/36

Claims (1)

(57) [Claims] In a line switching device for selectively switching and connecting a telephone line to a telephone and a data terminal device, a call signal detecting means for detecting a call signal on the telephone line, and a closing means for connecting the data communication device to the telephone line. Switching means for connecting the telephone to the telephone line, line closing detection means for detecting the formation of a DC loop by closing the telephone line, and determining whether the other terminal is a corresponding data communication device. A destination terminal determining means for determining, a calling signal generating means for generating a calling signal, and a DC power supply to the telephone set when the telephone set is released from the telephone line by the switching means, to change a hook state of the telephone set. An off-hook detecting means is provided for detecting the call signal. After detecting the call signal, the telephone line is closed, and if the formation of the DC loop is confirmed by the line closing detecting means, the telephone is released from the telephone line. In the state, the type of the partner terminal is determined by the partner terminal determining unit, and when the determination result is other than the corresponding data communication device, the generated calling signal is output to the telephone, and the telephone is determined by the off-hook detecting unit. When the off-hook is detected, the telephone is connected to the telephone line by the switching means, and then the closed data communication device is released from the telephone line via the closing means. A line switching device for maintaining a telephone line connected to a data communication device in the case of a corresponding data communication device. 2. In a line switching device for selectively switching and connecting a telephone line to a telephone and a data terminal device, a call signal detecting means for detecting a call signal on the telephone line, and a closing means for connecting the data communication device to the telephone line. Switching means for connecting the telephone to the telephone line, line closing detection means for detecting the formation of a DC loop by closing the telephone line, and determining whether the other terminal is a corresponding data communication device. A call terminal generating means for generating a call signal; and a DC power supply from the data terminal device to the telephone when the telephone is released from the telephone line by the switching means. And off-hook detecting means for detecting the hook state. After detecting the call signal, the telephone line is closed, and when the formation of a DC loop is confirmed by the line closing detecting means, In the state where the telephone is released from the terminal, the type of the partner terminal is determined by the partner terminal determining means. If the determination result is other than the corresponding data communication device, the generated calling signal is output to the telephone, If the detecting means detects that the telephone has gone off-hook, the switching means connects the telephone to the telephone line and then releases the closed data communication device from the telephone line via the closing means. On the other hand, if the result of the determination is a corresponding data communication device, the telephone line is maintained connected to the data communication device. 3. When a predetermined instruction operation is performed after the telephone is connected to a telephone line, the data terminal device is connected to the telephone line by the closing unit, and the communication operation of the data terminal device is performed. 3. The line switching device according to claim 1, wherein