JP2002176664A - Key telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key telephone system that can efficiently utilize a telephone line in common with respect to a facsimile machine, without the need for addition of a new circuit configuration and enable a user to easily utilize the key telephone system. SOLUTION: A master unit 10 utilizes a discrimination function of a facsimile communication/speech, provided in the facsimile machine 30 to make speech connection control, in response to the result of discrimination. That is, the master unit 30 calls the facsimile terminal 30, in response to a primary incoming call to a prescribed telephone line from a network side to make the facsimile machine 30 discriminate whether the primary incoming call is a signal of facsimile communication, detects the result of discrimination, on the basis of a state of a connection line 35 receiving a secondary incoming call from the facsimile machine 30, and controls a switch 14 in response to the result of detection to form facsimile communication or a call.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus, and more particularly to a key telephone apparatus in which a telephone line is shared between a facsimile apparatus connected to a main apparatus and a key telephone.

[0002]

2. Description of the Related Art With the spread of facsimile communication, facsimile machines are increasingly used in offices, shops, and even homes. Further, with the spread of ISDN communication networks and the like, an environment in which a plurality of telephone lines can be easily used is being prepared, and a key telephone device has been introduced to efficiently use these lines. When using such a facsimile apparatus and a key telephone apparatus, there is a demand to share the same telephone line between these apparatuses.

As a method for realizing such a demand, there are several methods for controlling the facsimile apparatus from the key telephone apparatus by regarding the facsimile apparatus as an analog telephone (slave unit) of the key telephone apparatus.

[0004] As one of them, an external line dedicated to facsimile communication is set in the key telephone apparatus, and for an incoming call to the external line dedicated to facsimile communication, only the facsimile apparatus is notified without informing the key telephone of the incoming call. Is called in accordance with the automatic response of the facsimile machine, and the outside line is captured and connected to the facsimile machine. As a result, CNG (Calling To
ne: 1100Hz) CNG of facsimile machine that detects signals
The signal detection means determines whether or not the communication is facsimile communication. If the communication is not facsimile communication, the communication is performed by the communication function of the facsimile apparatus.

[0005] As another method, there is a method in which a CNG signal detecting means for detecting facsimile communication is provided in a key telephone device, and the facsimile communication is distinguished by the key telephone device. As a result, an incoming call to an external line dedicated to facsimile communication set in the same manner as described above is automatically answered by the key telephone device, and when facsimile communication is detected by the CNG signal detecting means, only the facsimile device is called and connected. Otherwise, the key telephone is called.

[0006]

However, in such a conventional key telephone apparatus, according to the former, an incoming call to an external line dedicated to facsimile communication cannot be answered by the key telephone, and the key telephone apparatus cannot be used. However, there is a problem that the telephone line is not used effectively even though the connection is made. According to the latter, a CN for detecting facsimile communication is provided to a key telephone device.
It is necessary to provide a G signal detecting means, that is, an expensive circuit configuration dedicated to facsimile communication only for the purpose of detecting facsimile communication, and there has been a problem that the cost performance of the entire key telephone apparatus is reduced.

The present invention has been made to solve such a problem, and a telephone line can be efficiently shared with a facsimile apparatus without adding a new circuit configuration, so that the user can use the telephone line easily. It is intended to provide a good key telephone device.

[0008]

In order to achieve the above object, a key telephone apparatus according to the present invention comprises a main unit which transmits a call to a facsimile apparatus via a facsimile apparatus when the incoming call is other than a facsimile communication call. Connection interface for accommodating a connection line used to make a call with an external telephone, and exchange connection between the telephone line and one of the connection lines and the key telephone, and exchange connection between the telephone line and the facsimile machine And a control unit for controlling facsimile communication using a telephone line in a facsimile apparatus and a call using a telephone line in a key telephone by controlling the switch. Side calls the facsimile machine in response to the primary incoming call to the telephone line, Ri is determined whether the facsimile communication for the primary call, detected based on the state of the secondary there is an incoming call connection line from the facsimile apparatus, in which so as to control the switch according to the detection result.

[0009] Here, a first F which calls a main unit connected to the connection line in response to detection of an incoming call, and starts detection of a CNG signal in response to detection of a response to the call.
In the case of using a facsimile apparatus having an AX response processing procedure, the control unit notifies the key telephone of the occurrence of an incoming call to the connection line according to the secondary incoming call to the connection line. In response to this, the response key telephone is connected to the connection line, and a disconnection timer for measuring the elapse of a period required for facsimile communication determination by the facsimile apparatus is started. When the end of the call is detected, it may be determined that the primary incoming call is a facsimile communication call, and the connection line may be released to shift to the facsimile communication by the facsimile apparatus.

When a facsimile apparatus having the first FAX response processing procedure is used, the control unit notifies the key telephone of the occurrence of an incoming call to the connection line according to the secondary incoming call to the connection line, and responds to the incoming call. In response to the response on the key telephone, connect the response key telephone and the connection line, and activate a disconnection timer for measuring the elapse of a period required for facsimile communication determination in the facsimile apparatus,
If the end of the connection line is detected before the expiration of the disconnection timer, it is determined that the primary call is a facsimile communication call, the connection line is released, and the facsimile apparatus shifts to facsimile communication. Is also good.

In addition, when a facsimile apparatus having the first FAX response processing procedure is used, the control unit notifies the key telephone of the occurrence of an incoming call to the connection line in response to the secondary incoming call to the connection line, and receives the incoming call. In response to the response from the button telephone to the connection between the response button telephone and the connection line, the disconnection timer for measuring the elapse of the time required for the facsimile communication determination in the facsimile apparatus is started, and the communication is performed via the facsimile apparatus. If the disconnection timer times out is detected during a call on the telephone line by the answer button telephone, it is determined that the primary call is a call, and the telephone line on which the primary call arrived is sent from the facsimile apparatus to the answer button telephone. By switching the connection, it is possible to transfer to a telephone line using a response button telephone that does not go through a facsimile. It may be.

On the other hand, when an incoming call is detected, an automatic response
In the case of using a facsimile apparatus having the second FAX response processing procedure of starting the detection of the G signal and calling the main apparatus connected to the connection line only when the CNG signal is not detected, in the control unit, In response to the secondary call to the connection line, the primary call is determined to be a call, and the key telephone is notified of the occurrence of the call to the connection line. By switching and connecting the existing telephone line from the facsimile apparatus to the answering key telephone, the call may be shifted to a telephone line call using a key telephone that does not pass through a facsimile.

When a facsimile apparatus having the second FAX response processing procedure is used, the control unit determines that the primary call is a telephone call according to the secondary call to the connection line,
By notifying the key telephone of the occurrence of an incoming call to the connection line, and connecting the connection line to the response key telephone in response to the response of the call to the key telephone, the telephone line of the response key telephone via facsimile is used. It may be possible to shift to the call of.

In addition, when a facsimile apparatus having the second FAX response processing procedure is used, the control unit determines that the primary call is a telephone call according to the secondary call to the connection line, and sends the call to the key telephone. In addition to notifying the occurrence of an incoming call to the connection line, disconnecting the facsimile machine from the telephone line on which the primary call arrived, holding the telephone line in the main unit, and holding the telephone line in response to the key telephone response to this incoming call. By connecting the telephone line with the answering key telephone and the answering key telephone, the call may be transferred to the telephone line by the answering key telephone without passing through the facsimile.

When a facsimile transfer request is issued from a key telephone which is currently using a telephone line using one of the telephone lines, the control unit causes the key telephone to switch from the telephone line to the key telephone in response to the subsequent call termination by the key telephone. Disconnect the telephone line from the main unit, call the facsimile machine, ignore secondary incoming calls from the facsimile machine to the connection line in response to this call, and shift to facsimile communication with the facsimile machine. You may.

In a case where a facsimile apparatus having a second FAX response processing procedure is used, a telephone line having received a primary call and a response key telephone are responded to in response to a secondary call by a key telephone. In the case of direct connection, the control unit responds to the secondary call to the connection line by using the lamp corresponding to the telephone line on which the primary call of each key telephone has been received, and receiving the call from the network side for the telephone line. The same incoming call display as at the time may be performed.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a key telephone apparatus according to one embodiment of the present invention. Hereinafter, a case will be described as an example where the present embodiment is applied to a key telephone device to which an ISDN line is connected as a telephone line from the network side. The key telephone device is a main unit 10 connected to one or more telephone lines, here an ISDN line 11.
And a plurality of key telephones (slaves) 20A to 20N connected to the main device 10 via the extension transmission line 20. Also, a facsimile device 30 is connected to the main device 10 as an extension analog telephone,
A connection line 35 for connecting an external telephone to the facsimile device 30 is connected to the main device 10.

The main unit 30 includes an external line interface unit (hereinafter, referred to as an external line I / F unit) 12, an internal line interface unit (hereinafter, referred to as an internal line I / F unit) 13, and a switch 1.
4, main control unit 15, main storage unit 16, telephone control unit 17,
And connection line interface section (hereinafter, connection line I
/ F section) 18 is provided. Outside line I / F unit 1
2 is connected to the ISDN line 11 from the telephone network, performs digital data transmission with the network side, outputs various control messages from the network side to the main control unit 15, and outputs voice data to the switch 14. Further, it transmits various control messages from the main control unit 15 and voice data from the switch 14 to the network side.

The extension I / F unit 13 exchanges voice data and control data by performing data transmission with the key telephones 20A to 20N via the extension transmission line 20.
The telephone control unit 17 connects the facsimile machine 30 via the analog extension 31, and performs call control and voice data exchange with the facsimile machine 30. Connection line I /
The F unit 18 has a function of an analog external line interface unit, accommodates a connection line 35 from the facsimile device 30, and exchanges audio signals with the facsimile device 30 via the connection line 35. Therefore, a general analog external line interface can be used as the connection line I / F unit 18, and there is no need to provide a special configuration in the main device 10.

In the switch (time division switch) 14, in response to an instruction from the main control unit 15, the external line I / F unit 12 and the connection line I / F unit 18, and the internal line I / F unit 13 and the telephone control unit 17 And coded audio data is exchanged between the two. As a result, voice communication by the key telephones 20A to 20N using the ISDN line 11 and the ISDN line 11
The facsimile communication by the facsimile machine 30 using the facsimile machine is formed. In addition, a voice call is formed by the key telephones 20A to 20N via the facsimile device 30 and the connection line 35.

The main control unit 15 includes a CPU, has a timer 15A for measuring an arbitrary time length, and operates according to a predetermined program stored in the main control unit 15 or the main storage unit 16 in advance. Each part of the device 10 is controlled. The main storage unit 16 previously stores a program to be executed by the main control unit 15 as necessary, and stores information necessary for the processing operation of the main control unit 15. The information necessary for the processing operation includes, for example, the state of the ISDN line 11 and the connection line 35, the operation state of the key telephones 20A to 20N and the facsimile machine 30, the abbreviated telephone number, the redial telephone number, and the like.

The key telephones 20A to 20N are individually connected to the extension I / F of the main unit 10 via the extension transmission line 20. By exchanging control data with the main control unit 15 via the extension transmission line 20 and the extension I / F unit 13, control of each unit of the key telephone, for example, display of various lamps and output of a ringing tone, is performed. Is notified to the main control unit 15. Also, the external line I / F via the internal line transmission line 20 and the internal line I / F unit 13 is provided.
By exchanging voice data with the unit 12 and the connection line I / F unit 18, a call using the B1 and B2 of the ISDN line 11 and a call via the connection line 35 and the facsimile machine 30 are realized.

The facsimile machine 30 has a line control unit 3
2, a communication unit 33 and a call control unit 34 are provided. The line controller 32 receives an incoming signal (16 Hz) from the telephone controller 17 of the main device 10 via the analog extension 31.
Thus, the incoming call to the facsimile machine 30 is detected. Then, after responding to the call, by detecting the presence or absence of a CNG signal arriving from the network side, it is determined whether the call is a facsimile communication call or a telephone call.

In the communication unit 33, the line control unit 32
When a signal is detected and the call is determined to be a facsimile communication call, facsimile communication is performed via the analog extension 31 and the main device 10. The call control unit 34 calls an external telephone, in this case, the main device 10 via the connection line 35 in response to an instruction from the line control unit 32. The timing of this call differs depending on the facsimile response processing procedure to be described later.
2 detects an incoming call from the analog extension 31 or automatically responds to the incoming call after receiving a call from the network side.
For example, when the NG signal is not detected and the call is determined to be a telephone call.

In this embodiment, the facsimile machine 30
Main unit 1 has the function of facsimile communication / call
It is used starting from 0 and performing call connection control according to the determination result. That is, by calling the facsimile apparatus 30 in response to the primary call from the network side to a predetermined telephone line, the facsimile apparatus 30 determines whether or not facsimile communication is performed for the primary call, and the determination result is transmitted to the facsimile apparatus 30. , A secondary incoming call is detected based on the state of the connection line 35, and the switch 14 is controlled in accordance with the detection result to form facsimile communication or telephone conversation.

FIG. 2 shows an external view of the key telephone. On the key telephones 20A to 20N,
An “outside line 1 button” 21 and an “outside line 2 button” 22 corresponding to the B1 and B2 channels of the ISDN line 11 and a “FAX button” 23 corresponding to the connection line 35 are provided. Each of these buttons has an "outside line 1 lamp" as a lamp (LED) for displaying the state of the line.
21A, an “outside line 2 lamp” 22A, and a “FAX lamp” 23A are provided.

As function buttons, a "redial button" 24, a "hold button" 25, and a "transfer button" 26 are provided. The “transfer button” 26 is a button for instructing a transition from a call state to facsimile communication. In addition to these buttons, dial key 2
7. a display unit (LCD) 28 for displaying various information;
A handset 29 is provided.

Next, with reference to FIG. 3, as an operation of the present embodiment, an operation in a case where a primary call is received from the network side to the ISDN line 11 will be described. FIG. 3 is a flowchart showing the primary incoming call processing. ISDN from any source
When there is a call to the line 11, ISDN is sent from the network side.
The call setup message arrives via the D channel of the line 11. The external line I / F unit 12 receives the call setting message and passes it to the main control unit 15. The main control unit 15 analyzes the call setting message, and if the destination telephone number of the call setting message matches the telephone number set in advance for facsimile communication, the primary incoming call processing as shown in FIG. To start.

The main controller 15 first activates a call timer for time management of an incoming call to the facsimile machine 30 using the timer 15A (step 100).
In the same manner as a general incoming call process, the incoming call is sent to each of the key telephones 20A to 20N via the extension I / F unit 13 B
Instruct the blinking display of "outside line 1 lamp" 21A corresponding to one channel (step 101). Then, in order for the facsimile device 30 to determine whether or not the incoming call is a facsimile communication call, the telephone control unit 17 is controlled to output an incoming signal (16 Hz signal) to the analog extension 31, and the facsimile device 30 is called (step S1). 10
2).

The line control unit 32 of the facsimile machine 30 starts a predetermined FAX response process in response to the incoming call. FAX response processing of a general facsimile machine can be roughly divided into two procedures.

The first FAX response processing procedure is such that, in response to an incoming call to the analog extension 31, the telephone control unit 34 calls the external telephone device connected to the connection line 35, that is, the main device 10 in the present embodiment. Responds to the incoming call to analog extension 31 in response to the detection
This is a procedure for detecting a G signal. The second FAX response processing procedure automatically responds to an incoming call to the analog extension 31 and the main control unit 10 controls the switch 14 so that the external line I / F unit 12
Channel B1 and the analog extension 31 of the telephone control unit 17
This is a procedure for detecting a CNG signal from the network side via the main device 10 after the path has been connected.

After calling the facsimile apparatus 30, the main apparatus 10 receives a call from the facsimile apparatus 30 via the connection line 35 according to the facsimile response processing procedure.
That is, the process proceeds to a secondary incoming call detection loop for detecting a secondary incoming call (steps 103 and 106). In the secondary incoming call detection loop, if a secondary incoming call is detected by the connection line I / F section 18 before the call timer expires (step 103: YES), the call timer is stopped (step 104) and the facsimile is performed. A secondary incoming call process, which will be described later, according to the FAX response process procedure of the device 30 is executed (step 105), and a series of processes ends.

In the secondary incoming call detection loop, if the calling timer times out without detecting the secondary incoming call (step 106: YES), the facsimile machine 30
, It is determined that facsimile communication has been started, and a transition is made to the facsimile communication state (step 107), and a series of processing ends. In the facsimile communication state, the B1 channel and the analog extension 3 are not used until the release of the analog extension 31 by the facsimile device 30 is detected by the telephone control unit 17, that is, until the facsimile communication ends.
1 is maintained. When the facsimile apparatus 30 releases the analog extension 31 in response to the end of the facsimile communication, the path is disconnected and the B1 channel and the analog extension 31 are released.

In the following, as a first embodiment, a first embodiment will be described.
A case where the facsimile apparatus 30 having the FAX response processing procedure is connected to the main apparatus 10 will be described. As a second embodiment, the facsimile apparatus 30 having the second FAX response processing procedure is connected to the main apparatus 10. The following is a description of the case. In order to cope with these differences in the facsimile response processing procedure, the main apparatus 1 determines which facsimile apparatus 30 uses the facsimile response processing procedure.
0 is set in the main storage unit 16 in advance.

First, a first embodiment according to the present invention will be described. The facsimile machine 30 is the first FAX
When the response processing procedure is used, the FAX response processing as shown in FIG. FIG. 4 is a flowchart showing a first FAX response processing procedure of the facsimile machine. The line control unit 32 of the facsimile machine 30 controls the call control unit 34 in response to the call from the telephone control unit 17 of the main device 10 via the analog extension 31 to call the main device 10 from the connection line 35 ( Step 200). Then, in response to this call, that is, a response operation on the key telephone for the secondary call,
When the line controller 32 of the main device 10 has captured the connection line 35 (step 201: YES), the analog extension 31
(Step 202).

In the main control section 15 of the main apparatus 10, the telephone control section 17 detects the response of the facsimile apparatus 30, and sends a response message to the primary incoming call to the network side. Then, by controlling the switch 14, B1 of the external line I / F unit 12 is controlled.
The path between the channel and the analog extension 31 of the telephone control unit 17 is connected. As a result, the network side and the facsimile machine 30 are connected via the main device 10 and the analog extension 31, and the main device 10 (key telephone) is connected via the connection line 35. Thereafter, the facsimile machine 30
The line control unit 32 determines whether there is a CNG signal from the network side (step 203).

If a CNG signal is detected within a predetermined time after the response (step 203: YES), it is determined that the incoming call is a facsimile communication call, and the connection line 3
5 is released (end-call), facsimile communication by the communication unit 33 is started (step 204), and a series of processing ends. On the other hand, if the CNG signal is not detected within a predetermined time from the response (step 203: NO), it is determined that the incoming call is a call, and the call is sent to the main device 10 via the call control unit 34 and the connection line 35. The communication via the facsimile machine 30 is started by maintaining the line connection path (step 205), and a series of processing ends.

When the facsimile apparatus 30 using the first facsimile response processing procedure is connected, the main control unit 15 of the main apparatus 10 responds to the secondary incoming call from the facsimile apparatus 30 as shown in FIG. Such secondary incoming call processing is started. FIG. 5 is a flowchart showing the secondary incoming call processing according to the first embodiment. When a secondary incoming call is detected through the connection line I / F unit 18, the main control unit 15 first transmits the key telephones 20 A to 20 A through the extension I / F unit 13.
N is instructed to blink the "FAX lamp" 23A (step 110). Thereby, each key telephone 20A ~
At 20N, an incoming call display indicating the secondary incoming call is performed.

When there is a response operation to any of the button telephones for the secondary incoming call (step 111: YE
S) The main control unit 15 controls the connection line I / F unit 18 to capture the connection line 35 and controls the switch 14 to connect the connection line 35 of the connection line I / F unit 18 to the extension I / F.
A path is connected to the response button telephone of the / F section 13 (step 112). As a result, after the path connection with the B1 channel according to the subsequent capture of the analog extension 31 by the facsimile machine 30, the external telephone call is formed by the answer button telephone on the B1 channel via the facsimile machine 30 and the connection line 35. Is done.

At the same time, the key telephones 20A-20
N is instructed to light the "FAX lamp" 23A (step 113), and a disconnection timer using the timer 15A is started (step 114). A sufficient time length required for the facsimile machine 30 to determine the presence / absence of a CNG signal is set in advance in the disconnection timer.
The elapse of the period required to determine the presence or absence of the G signal is confirmed. Thereafter, a call process via facsimile for controlling a call state of the answer key telephone via the facsimile device 30 is executed (step 115).

FIG. 6 shows a flowchart of the telephone call processing via FAX. In the main control unit 15, steps 116 to 118
To a call processing loop consisting of In this call processing loop, if the end of the answer button telephone that responds to the secondary incoming call is detected before the time-out of the disconnection timer (step 116: YES), the responding user, for example, By listening to the CNG signal from the side and confirming that it is not a voice call, that is, it is facsimile communication, it can be determined that the call has ended.

Therefore, in this case, the disconnection timer is stopped (step 120), the connection line I / F unit 18 is controlled to release the connection line 35 (step 12).
1) The switch 14 is controlled to disconnect the path between the connection line 35 and the answering key telephone (step 122). Then, "FAX" is sent to the key telephones 20A to 20N.
An instruction to turn off the lamp "23A" is issued (step 123), and a transition is made to a facsimile communication state by the facsimile machine 30 via the main device 10 (step 124), and a series of processes is ended.

In the call processing loop, if the disconnection / end of the connection line 35 is detected before the timeout of the disconnection timer (step 117: YES), the facsimile apparatus 30 determines that the communication is facsimile communication and connects. It can be determined that the line 35 has been disconnected / ended. Therefore, the process proceeds to step 120 as described above. At this time, as a method of detecting disconnection / end of the connection line 35 in the connection line I / F unit 18, the facsimile apparatus 3
Busy tone from the 0 side, silence, facsimile machine 30
There is a method of detecting a change in the voltage / current of the connection line 35 based on the line release on the side.

If it is detected in the call processing loop that the disconnection timer has timed out (step 11).
8: YES), since the connection line 35 is not released despite the end of the detection of the CNG signal, it can be determined that the facsimile device 30 has determined that the call is not facsimile communication but a call. Therefore, in this case, the switch 14 is controlled so that the path of the extension I / F unit 13 to the answer button telephone is connected from the connection line 35 of the connection line I / F unit 18 to the B1 channel of the external line I / F unit 12. (Step 125), and the key telephones 20A-20
N is instructed to light the "outside line 1 lamp" 21A (step 126).

The analog extension 3 of the telephone controller 17
1 and the B1 channel of the external I / F unit 12 are disconnected, and the analog extension 31 is released to disconnect the facsimile machine 30 (step 127).
A to 20N are instructed to turn off the "FAX lamp" 23A (step 128). Then, the system shifts to the outside line communication state using the B1 channel by the answer button telephone (step 129), and ends a series of processing.

As described above, in the first embodiment, when the button telephone responds to the call according to the secondary incoming call to the connection line 35, the disconnection timer is activated, and the button is activated before the time-out. When the call is terminated by the telephone, or when the disconnection / end of the connection line 35 by the facsimile apparatus 30 is detected, it is determined that the primary call is a facsimile communication call, and the state shifts to the facsimile communication state. I did it. Also, in response to the expiration of the disconnection timer, the facsimile machine is disconnected from the telephone line on which the primary call arrived, and the telephone line is connected to the answering key telephone, so that the telephone line of the answering key telephone that does not pass through the facsimile machine is connected. Made the transition to a telephone call.

Therefore, the first FAX response processing in which the main device 10 connected to the connection line 35 is called in response to the detection of the incoming call at the analog extension 31 and the detection of the CNG signal is started in response to the detection of the response to the call. Even when using a facsimile machine with procedures, the telephone line can be efficiently shared with the facsimile machine without adding a new circuit configuration, and the user can easily use it without being aware of facsimile communication. It is possible to provide a convenient button telephone device.

Next, a second embodiment according to the present invention will be described. The facsimile machine 30 has the second FAX
When the response processing procedure is used, FAX response processing as shown in FIG. 7 is executed in response to a call from the main device 10. FIG. 7 is a flowchart showing a second FAX response processing procedure of the facsimile machine. The line control unit 32 of the facsimile machine 30 automatically responds to a call from the telephone control unit 17 of the main device 10 via the analog extension 31 (step 210).

In the main control unit 15 of the main unit 10, the response of the facsimile device 30 is detected by the telephone control unit 17, and a response message is sent to the network side to the primary incoming B1 channel. Then, the switch 14 is controlled to connect the path between the B1 channel of the external line I / F unit 12 and the analog extension 31 of the telephone control unit 17. Thus, the network side and the facsimile machine 30 are connected via the main device 10 and the analog extension 31. Thereafter, the line controller 32 of the facsimile machine 30 determines whether there is a CNG signal from the network side via the main device 10 (step 21).
1).

If a CNG signal is detected within a predetermined time from the response (step 211: YES), it is determined that the incoming call is a facsimile communication call, and the communication unit 33
Facsimile communication is started (step 212).
A series of processing ends. On the other hand, C
If no NG signal is detected (step 211:
NO), it is determined that the incoming call is a telephone call, and the telephone controller 34 is controlled to call the main device 10 from the connection line 35 (step 213). The connection line 35 is captured by the main device 10 by the response operation of the call, that is, the secondary incoming call by the key telephone. In response to this capture (step 214: YES), a telephone call via the facsimile machine 30 is started (step 215), and a series of processing ends.

When the facsimile apparatus 30 using the second FAX response processing procedure is connected, the main control unit 15 of the main apparatus 10 responds to the secondary call from the facsimile apparatus 30 according to FIG. Such secondary incoming call processing is started. FIG. 8 is a flowchart showing the secondary incoming call processing according to the second embodiment. When a secondary incoming call is detected through the connection line I / F unit 18, the main control unit 15 first transmits the key telephones 20 A to 20 A through the extension I / F unit 13.
N is instructed to re-flash the "outside line 1 lamp" 21A corresponding to the B1 channel (step 130). As a result, each of the key telephones 20A to 20N performs an incoming call display for notifying a virtual primary incoming call instead of the secondary incoming call.

When there is a response operation to this virtual primary call by any of the button telephones (step 131:
YES), the main control unit 15 controls the switch 14 so that the B1 channel of the external line I / F unit 12 and the internal line I / F unit 1
Connect the path to the answer button telephone set 3 (step 13)
2), to key telephones 20A to 20N "Outside line 1 lamp"
An instruction is given to turn on 21A (step 133). In addition, the analog extension 31 and the external I / F 12 of the telephone controller 17
In addition to disconnecting the path to the B1 channel, the analog extension 31 is released and the facsimile machine 30 is disconnected (step 134). Then, the process shifts to an outside line communication state using the B1 channel by the answering key telephone (step 135), and a series of processing ends.

As described above, in the second embodiment, when the key telephone responds to the call corresponding to the secondary incoming call to the connection line 35, the primary telephone does not pass through the connection line 35 and the facsimile machine 30, The incoming telephone line is directly connected to the answering button telephone. Therefore, detection of the CNG signal is started automatically in response to the detection of the incoming call at the analog extension 31, and the main unit 10 connected to the connection line 35 only when the CNG signal is not detected.
Can be efficiently shared with the facsimile apparatus without adding a new circuit configuration even when a facsimile apparatus having the second FAX response processing procedure of calling is used.

Further, the facsimile machine 30 can be released immediately after the secondary incoming call response, and it can flexibly cope with an incoming call for facsimile communication or a call request from the facsimile machine 30 thereafter. it can. further,
Even if a secondary call from the facsimile device 30 is received, it is regarded as a virtual primary call, and the "external line 1 lamp" 21A is blinked again without blinking the "FAX lamp" 23A. It can be easily used without being aware of the secondary incoming call via the device 30, and the convenience of the key telephone device is improved.

Next, a third embodiment according to the present invention will be described with reference to FIG. In the above-described second embodiment, a case has been described in which, when a secondary call from the facsimile apparatus 30 is answered, the telephone line that has received the primary call and the answering button telephone are directly connected. In the present embodiment, a case will be described in which a telephone call is formed via the facsimile machine 30 and the connection line 35 without directly connecting the telephone line and the answering key telephone.

FIG. 9 is a flowchart showing a secondary incoming call process according to the third embodiment. Connection line I / F unit 1
When the secondary incoming call is detected via the extension 8, the main control unit 15 firstly transmits the key telephone 20 A via the extension I / F unit 13.
20N is instructed to blink the "FAX lamp" 23A (step 140). Thereby, each key telephone 2
At 0A to 20N, an incoming call display indicating the secondary incoming call is performed.

If there is a response operation to any of the button telephones in response to the secondary call (step 141: YE
S), the main control unit 15 controls the switch 14 to connect the path between the connection line 35 of the connection line I / F unit 18 and the answer button telephone of the extension I / F unit 13 (step 14).
2). As a result, an outside line call on the B1 channel through the facsimile machine 30 and the connection line 35 is formed by the answer key telephone. At the same time, it instructs the key telephones 20A to 20N to turn on the "FAX lamp" 23A (step 143). As a result, a call process via facsimile for controlling a call state of the answer key telephone set via the facsimile device 30 is executed (step 144).

FIG. 10 shows a flowchart of the communication process via FAX. In the main control unit 15, the facsimile machine 30
If the end of the answering button telephone is detected in the outside line call state of the answering key telephone via the terminal (step 150: YES), there is a possibility that the facsimile communication is started after the end of the answering telephone call.

Therefore, the connection line I / F unit 18 is controlled to release the connection line 35 (step 15).
1) controlling the switch 14 to connect the connection line I / F unit 18
Then, the path between the connection line 35 and the answer button telephone of the extension I / F unit 13 is disconnected (step 152). Then, it instructs the key telephones 20A to 20N to turn off the "FAX lamp" 23A (step 153), shifts to the facsimile communication state by the facsimile device 30 via the main device 10 (step 154), and ends a series of processing. .

As described above, in the third embodiment, an external telephone call is formed via the facsimile machine 30 in response to the response to the secondary incoming call, and the connection line 35 is released in response to the end of the call to perform the facsimile communication. Changed to state. Therefore, detection of the CNG signal is started automatically in response to the detection of the incoming call at the analog extension 31, and the main unit 1 connected to the connection line 35 only when the CNG signal is not detected.
Even when a facsimile apparatus having the second FAX response processing procedure of calling 0 is used, the telephone line can be efficiently shared with the facsimile apparatus without adding a new circuit configuration.

Further, by releasing the connection line 35, facsimile communication can be started in accordance with a facsimile signal from the network side in accordance with the function of the general facsimile apparatus 30. If the end of the answer button telephone is not the end for starting facsimile communication, then a facsimile signal from the network side cannot be detected within a predetermined time, or a busy tone due to the other party's end call may not be detected. If it is detected, the facsimile machine 30 releases the analog extension 31. Thereby, the main control unit 15
Then, the release is detected by the telephone control unit 17, and a disconnection / release message is transmitted to the network side to release the B1 channel, and the switch 14 is controlled to control the B1 channel of the external I / F unit 12 and the telephone control unit. The path to the 17 analog extension 31 is disconnected.

Next, a fourth embodiment according to the present invention will be described with reference to FIG. In the above-described second embodiment, the case where the telephone line on which the primary call is received is directly connected to the answer button telephone when the secondary call from the facsimile device 30 is answered, and the facsimile device is disconnected Was explained. In the present embodiment, the facsimile device 30
Will be described.

FIG. 11 is a flowchart showing a secondary incoming call process according to the fourth embodiment. When a secondary incoming call is detected via the connection line I / F unit 18, the main control unit 15
First, the key telephone 20 via the extension I / F unit 13
A to 20N "Outside line 1 lamp" corresponding to B1 channel
An instruction to re-blink 21A is displayed (step 160). As a result, each of the key telephones 20A to 20N performs an incoming call display for notifying a virtual primary incoming call instead of the secondary incoming call. Further, the switch 14 is controlled to control the external line I / F 12
Channel B1 and the analog extension 31 of the telephone control unit 17
The main device 10 temporarily holds the B1 channel, and transmits a ringback tone or a voice message of "calling" to the telephone line (step 161). Under control, the analog extension 31 is released and the facsimile machine 30 is disconnected (step 162).

Thereafter, when there is a response operation to the virtual primary incoming call with any of the button telephones (step 16).
3: YES), the main control unit 15 controls the switch 14 to connect the path between the B1 channel of the external line I / F unit 12 and the answer key telephone of the internal line I / F unit 13 (step 1).
64), and instructs the key telephones 20A to 20N to turn on the "outside line 1 lamp" 21A (step 165). Then, a transition is made to the outside line communication state using the B1 channel by the answer button telephone (step 166), and a series of processing is ended.

As described above, in the fourth embodiment, in response to the detection of the secondary incoming call, the telephone line having the primary incoming call is held by the main unit 10, and the facsimile device 30 is disconnected. Therefore, in response to the detection of the incoming call at the analog extension 31, the CNG signal is automatically detected and started to be detected, and the main device 10 connected to the connection line 35 is called only when the CNG signal is not detected. F
Even when a facsimile apparatus having an AX response processing procedure is used, a telephone line can be efficiently shared with the facsimile apparatus without adding a new circuit configuration. Further, the facsimile machine 30 can be brought into a usable state earlier as compared with the second embodiment.

Next, a fifth embodiment of the present invention will be described with reference to FIG. As in the above-described third embodiment, when an external call is being made via the facsimile device 30, the call can be transferred to facsimile communication by ending the call with the key telephone. In the present embodiment, a case will be described in which a transition is made to facsimile communication in a state where the key telephone is making an external call without passing through the connection line 35 and the facsimile device 30.

FIG. 12 is a flowchart showing a facsimile transfer process when the communication mode is shifted to the facsimile communication. When the “transfer button” 26 is pressed on the key telephone in a state where the key telephone does not go through the facsimile machine 30 and performs, for example, an outside call on the B1 channel, the main control unit 15 shown in FIG. FAX
Start the transfer process. First, the fact that facsimile transfer processing is being performed is stored in the main storage unit 16, and a transfer timer is started using the timer 15A (step 170). This transfer timer is for managing the time of the FAX transfer process.

Subsequently, after confirming the end of the call by the key telephone (step 171: YES), the outside line I / F unit 1
2 controls the B1 channel which has been on the outside line
0 (step 172), and controls the switch 14 to control the B1 channel of the external I / F unit 12 and the internal I / F unit 13.
Disconnect the path with the key telephone (step 17)
3). Then, the "outside line 1 lamp" 21A corresponding to the B1 channel is instructed to blink to the key telephones 20A to 20N via the extension I / F unit 13 (step 17).
4) The telephone control unit 17 calls the facsimile machine 30 for incoming call (step 175).

Subsequently, the main control unit 15 proceeds to a secondary incoming call detection loop for detecting a secondary incoming call from the facsimile machine 30 (steps 176 and 177). In the secondary call detection loop, if a secondary call is detected by the connection line I / F unit 18 before the transfer timer times out (step 176: YES), the transfer timer is stopped (step 180), The secondary incoming call processing as described above is not executed, and the secondary incoming call is ignored (step 181). Then, the state shifts to the facsimile communication state (step 18).
2), a series of processing ends.

In the secondary incoming call detection loop, if the secondary incoming call is not detected and the transfer timer times out (step 177: YES), the facsimile machine 30
, It is determined that facsimile communication has been started, and a transition is made to the facsimile communication state (step 182), and a series of processing ends.

As described above, in the fifth embodiment, when a shift to facsimile communication is requested in a state where the key telephone is making an external call without passing through the facsimile apparatus 30, the facsimile apparatus 30 is called from the main apparatus 10, and subsequent incoming calls from the facsimile apparatus 30 are ignored. Therefore, even when the facsimile communication is started from a state where the key telephone is making an outside call without passing through the facsimile apparatus, it is possible to perform a smooth call switching control without giving a misunderstanding to the user. .

In the above description, the telephone line is ISDN
Although the case where a line is used has been described as an example, the present invention is not limited to this, and the present invention can be applied to an analog telephone line, and the same operation and effect as described above can be obtained. Also,
As in the case of the B1 and B2 channels, a plurality of telephone lines need not be connected to the main device 10, and the present invention can be applied to a case where only one telephone line is connected. The effect is obtained.

The period during which the telephone control section 17 of the main apparatus 10 is receiving a call to the facsimile apparatus 30 is as follows.
The calling operation from the key telephone may be invalidated. As a result, the primary incoming call is sent to the facsimile machine 3
Control can be performed prior to 0. Further, in step 101 of the primary incoming call process (FIG. 3), the case where the incoming call outside line lamp is controlled to blink in response to the detection of the primary incoming call has been described. Good. As a result, it is possible to visually notify the user of each key telephone that the telephone line that has received the primary call is in use and unavailable. Thus, the primary incoming call can be controlled by the facsimile apparatus 30 with priority.

Regarding the lighting / flashing control of the outside line lamp,
The control may be performed in detail in accordance with the operation state or connection state at that time. For example, when the facsimile device 30 is called from the telephone control unit 17 of the main device 10, the fax lamp may be blinked. Thus, the user of each key telephone can be notified that the facsimile machine 30 is being called. Further, when the key telephone is called in response to the secondary call to the connection line 35, the external line lamp of the corresponding external line having the primary call may be blinked. As a result, the user of each key telephone can be notified of which external line the call is related to.

When the facsimile machine 30 is in the communication state, the facsimile lamp may be turned on together with the external line lamp of the external line corresponding to the primary incoming call. Thus, it is possible to notify the user of each key telephone that facsimile communication is being performed. Further, when the key telephone is called in response to the secondary call while the facsimile apparatus 30 is being called, the FAX lamp may be blinked together with the external line lamp at which the corresponding primary call has been received. Thus, the user of each key telephone can be notified of the secondary incoming call via the facsimile machine and the corresponding external line.

In the above, the key telephone apparatus has been described as an example. However, each embodiment of the present invention can also be applied to an exchange accommodating an extension of a facsimile apparatus. In general,
In the exchange, a single telephone, a key telephone or a facsimile apparatus is accommodated via an analog telephone I / F unit corresponding to the telephone control unit 17 in FIG. An external line I / F for an analog external line
A part is also provided. Therefore, the connection line from the facsimile machine accommodated by the extension is connected to the connection line I /
What is necessary is just to accommodate in the external line I / F part for analog external lines corresponding to the F part 18. Thereby, the same operation and effect as those of the above embodiments can be obtained.

[0077]

As described above, the present invention is used for making a call to an external telephone via a facsimile apparatus when an incoming call to the facsimile apparatus is other than a facsimile communication call. A connection line interface unit for accommodating the connection line, a switch for arbitrarily switching connection between any of the telephone line and the connection line and any of the key telephone and the facsimile device, and controlling the switch to provide a facsimile device. A control unit for forming facsimile communication using a telephone line and a call using a telephone line using a key telephone are provided, and the control unit causes the facsimile apparatus to respond to a primary call to a predetermined telephone line among the telephone lines. By calling, whether the facsimile machine is facsimile communication for the primary incoming call Or it is determined by detecting based the determination result to the state of the connection lines from the facsimile apparatus of the secondary ring, but which is adapted to control the switch according to the detection result. Therefore, a telephone line can be efficiently shared with a facsimile apparatus without adding a new circuit configuration, and a user-friendly button telephone apparatus can be provided that can be easily used without the user being aware of facsimile communication. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a key telephone device according to an embodiment of the present invention.

FIG. 2 is an external view of a key telephone.

FIG. 3 is a flowchart showing a primary incoming call process.

FIG. 4 is a flowchart illustrating a first fax response process.

FIG. 5 is a flowchart illustrating a secondary incoming call process according to the first embodiment;

FIG. 6 is a flowchart illustrating a facsimile communication process according to the first embodiment;

FIG. 7 is a flowchart illustrating a second FAX response process.

FIG. 8 is a flowchart illustrating a secondary incoming call process according to the second embodiment;

FIG. 9 is a flowchart illustrating a secondary incoming call process according to the third embodiment.

FIG. 10 is a flowchart illustrating a facsimile communication process according to the third embodiment.

FIG. 11 is a flowchart illustrating a secondary incoming call process according to the fourth embodiment;

FIG. 12 is a flowchart illustrating a facsimile transfer process according to a fifth embodiment;

[Explanation of symbols]

10: Main unit, 11: Telephone line, 12: External line I / F unit,
Reference numeral 13: extension I / F unit, 14: switch, 15: main control unit, 15A: timer, 16: main storage unit, 17: telephone control unit, 18: connection line I / F unit, 20: extension transmission line, 2
0A to 20N: key telephone, 21: external line 1 button, 2
1A: external line 1 lamp, 22: external line 2 button, 22A: external line 2 lamp, 23: FAX button, 23A: FAX lamp, 26: transfer button, 31: analog extension, 32: line control unit, 33: communication unit, 34 ... call control unit, 35 ... connection line.

Continued on the front page (72) Inventor Katsuhiko Onozuka 2-3-3 Shimomeguro, Meguro-ku, Tokyo F-term in Tamura Electric Works (reference) 5C062 AA02 AA12 AA30 AC42 AE14 5K049 AA15 BB05 BB17 BB19 BB21 CC01 CC04 EE02 FF02 FF12 5K101 KK01 LL01 MM03 NN02 NN21 RR21 RR28 UU04

Claims (9)

[Claims] 1. A key telephone device comprising a main device connected to one or more telephone lines from a network side and connecting a facsimile device as an analog telephone, and a key telephone connected to the main device. A connection line interface unit for accommodating a connection line used for making a call with an external telephone via the facsimile device when an incoming call to the facsimile device is other than a facsimile communication call; A switch for exchanging and connecting any one of a telephone line and the connection line with the key telephone, and a switch for exchanging and connecting the telephone line with a facsimile device; by controlling this switch, the telephone line in the facsimile device The facsimile communication used and the telephone call using the telephone line with the key telephone are connected. And a control unit that forms each of the facsimile devices by calling the facsimile device in response to a primary call from the network side to the telephone line. A key telephone apparatus, wherein the determination is made based on the state of the connection line where the secondary call from the facsimile apparatus is received, and the switch is controlled in accordance with the detection result. 2. The key telephone apparatus according to claim 1, wherein the control unit notifies the key telephone of the occurrence of an incoming call to the connection line in response to a secondary incoming call to the connection line. In response to the response on the key telephone, the response key telephone is connected to the connection line, and a disconnection timer for measuring the elapse of a period required for facsimile communication determination in the facsimile apparatus is started. If the end call on the key telephone is detected before the time-up, it is determined that the primary incoming call is a facsimile communication call, the connection line is released, and the facsimile apparatus shifts to facsimile communication. Characteristic key telephone device. 3. The key telephone apparatus according to claim 1, wherein the control unit notifies the key telephone of the occurrence of an incoming call to the connection line in response to a secondary incoming call to the connection line, and In response to the response on the key telephone, the response key telephone is connected to the connection line, and a disconnection timer for measuring the elapse of a period required for facsimile communication determination in the facsimile apparatus is started. If the disconnection of the connection line is detected before the time-up, it is determined that the primary call is a facsimile communication call, the connection line is released, and the facsimile apparatus shifts to facsimile communication. Button telephone equipment to do. 4. The key telephone apparatus according to claim 1, wherein the control unit notifies the key telephone of the occurrence of an incoming call to the connection line in response to a secondary incoming call to the connection line, and In response to a response from the key telephone, the response key telephone is connected to the connection line, and a disconnection timer for measuring the elapse of a period required for facsimile communication determination in the facsimile apparatus is started, and the facsimile apparatus is activated. If the disconnection timer times out is detected in a call state on the telephone line by the answering button telephone that passed through, it is determined that the primary call is a call, and the telephone line on which the primary call was received is called the By switching connection from the facsimile apparatus to the answering key telephone, the answering key telephone that does not pass through the facsimile can be connected. Key telephone system which is characterized in that transition that the call by the telephone line. 5. The key telephone apparatus according to claim 1, wherein the control unit determines that the primary call is a telephone call in response to a secondary call to the connection line, and connects the key telephone to the key telephone. Notifying the occurrence of an incoming call to the line, and in response to the response from the key telephone to the incoming call, by switching and connecting the telephone line having the primary incoming call from the facsimile apparatus to the answering key telephone, via the facsimile A key telephone apparatus for transferring to a telephone call on the telephone line by the key telephone. 6. The key telephone apparatus according to claim 1, wherein the control unit determines that the primary call is a telephone call in response to a secondary call to the connection line, and connects the key telephone to the key telephone. Notifying the occurrence of an incoming call to a line, and connecting the connection line and the answering key telephone in response to the answering of the incoming call with the key telephone, thereby connecting the telephone line by the answering key telephone via the facsimile. A key telephone device for transferring to a telephone call. 7. The key telephone apparatus according to claim 1, wherein the control unit determines that the primary incoming call is a telephone call in response to a secondary incoming call to the connection line, and performs the connection to the key telephone. While notifying the occurrence of an incoming call to the line, disconnecting the facsimile apparatus from the telephone line where the primary call was received, holding the telephone line in the main device, and holding the telephone line in response to the incoming call with the key telephone set. A key telephone apparatus for connecting to the telephone line by the response key telephone which does not pass through the facsimile by connecting the telephone line and the response key telephone. 8. The key telephone apparatus according to claim 1, wherein the control unit, when receiving a facsimile transfer request from a key telephone which is currently talking on the telephone line using one of the telephone lines, terminates the subsequent key telephone. In response to the call, disconnect the key telephone from the telephone line, hold the telephone line in the main unit, call the facsimile device, and make a secondary call from the facsimile device to the connection line in response to the call. The key telephone apparatus is characterized in that the facsimile apparatus shifts to facsimile communication with the facsimile apparatus. 9. The key telephone device according to claim 5, wherein the control unit responds to the secondary incoming call to the connection line to the telephone line of each of the key telephones that received the primary incoming call. A key telephone apparatus for displaying, using a lamp, the same incoming call display as the incoming call from the network side for the telephone line.