JPH0614653B2 - Equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an external telephone, which is selectively connected to an external line,
The present invention relates to a facsimile machine including a built-in telephone and a facsimile main body.

[Conventional technology]

Conventionally, a facsimile device has a built-in telephone, and a telephone (external telephone) is connected to an external terminal provided on the main body.
Can be attached independently.

That is, by branch-connecting the built-in telephone and the external telephone with respect to the external line, the call to the external line and the call from the external line can be made from the built-in telephone and the external telephone.

Usually, between such an internal telephone and an external telephone,
The secret story function is working. That is, when a call is made to or received from an outside line, the person who off-hooks the handset first between the built-in telephone and the outside telephone is given the priority to capture the line, and the confidential state for the other is given. Will be guaranteed.

[Problems to be Solved by the Invention]

However, according to such a conventional facsimile apparatus, since the confidential communication function works between the built-in telephone and the external telephone, there is a problem that the extension telephone call cannot be made between the built-in telephone and the external telephone.

[Means for Solving the Problems]

The present invention has been made to solve such a problem, and a first invention thereof is an extension line connecting an external telephone and an internal telephone, and an external line connecting an external telephone and an internal telephone to an external line. A call path, a call signal generation circuit for outputting a call signal to a ring tone generation circuit, a first switching means for switching and connecting an outside line to either the facsimile main body or an outside line communication path, and a built-in telephone for outside line communication at all times A second switching means for connecting to the line, and a third switching means for connecting the external telephone to the internal communication path at all times and switching to and connecting to the external communication path based on an external call request and an external call from the external telephone.
Second based on the call operation of the built-in telephone to the external telephone
And a control unit for switching the built-in telephone from the outside telephone line side to the inside telephone line side and controlling the ringing signal generation circuit based on the above operation to output the ringing signal to the ringing tone generation circuit of the external telephone. Be prepared.

A second aspect of the invention is an extension line for connecting an external telephone having a dial key and a built-in telephone, an outside line for connecting the external telephone and the built-in telephone to an outside line, and a ringing signal for a ringing tone generation circuit. A calling signal generating circuit for outputting
First switching means for switching and connecting an external line to either the facsimile main body or the external line communication path, a second switching means for connecting the built-in telephone to the external line communication path at all times, and an external telephone for the internal line communication path at all times And a third switching means for switching to and connecting to an outside line communication path based on an outside line call request of the external telephone and an outside line incoming call, and a second switching means based on a call operation to the built-in telephone of the external telephone for controlling the built-in state. And a control unit for switching the telephone to an extension communication path and controlling the ringing signal generating circuit based on the operation to output the ringing signal to the ringing tone generating circuit of the built-in telephone.

A third invention is that in the second invention, a transfer signal transmitted based on a transfer key operated according to a call to the built-in telephone set by the external telephone set and an external line incoming call transfer based on facsimile communication to the facsimile main body is detected. When a detection of the ringing of the built-in telephone is detected by the detection circuit, the second switching means is controlled to switch the built-in telephone to the extension line side, and the ringing signal generation circuit is controlled to ring the built-in telephone. While the calling signal is output to the generation circuit, when the external circuit incoming transfer is detected by the detection circuit, the first switching means is controlled to switch the external line to the facsimile main body for connection.

[Action]

Therefore, according to the first aspect of the present invention, the internal telephone is switched to the extension communication path side to call the external telephone based on the calling operation of the internal telephone with respect to the external telephone. A call path is formed between the external telephone and the built-in telephone.

Further, according to the second invention of the present application, based on a calling operation to the built-in telephone of the external telephone, the built-in telephone is switched to the extension call side, the built-in telephone is called, and if the built-in telephone is off-hooked, the built-in telephone is built-in. A call path is formed between the telephone and the external telephone.

Further, in the third invention of the present application, when is detected in response to the calling of the built-in telephone by the external telephone, the built-in telephone is switched to the extension communication path side and called. Further, when a dial signal transmitted based on a transfer key operated in response to external line incoming transfer based on facsimile communication to the facsimile main body by the external telephone is detected, the external line is switched and connected to the facsimile main body.

〔Example〕

Hereinafter, the facsimile device according to the present invention will be described in detail.

FIG. 8 is a perspective view of a system configuration showing an embodiment of this facsimile apparatus. In the figure, 1 is a built-in telephone (hereinafter referred to as an internal TEL) built in the facsimile main body 3, and 2 is an external telephone (hereinafter referred to as an external TEL) installed in a room different from the facsimile main body 3, for example. .

FIG. 1 is a block circuit diagram of the facsimile apparatus. In the figure, TEL1 is the handset 1-1,
Consists of a call circuit 1-2, a ring tone generation circuit 1-3 and a hook switch HS1, and an outer TEL2 is a handset 2-1, a call circuit 2-2, a ring tone generation circuit 2-3, a dial key 2-4, PB.
It consists of a sender 2-5 and a hook switch HS2. Further, in the facsimile main body 3, 4 is a 16 Hz oscillation circuit that generates a 16 Hz ringing signal, 5 is a 400 Hz oscillation circuit that generates tone signals such as ringback tone, busy tone, and dial tone, and 6 is an image signal received from the outside line L. Ry1 is a modem that demodulates the signal and modulates an image signal read by the CCD 15 that will be described later.
inner via y4 TEL1, line out TEL2 side (hereinafter, referred to as external call path) 20 and a first relay switch to one of the modem 6, Ry2 is a inner TEL1 external call path 20 and the transformer _T 1, Outside TEL via T ₂
Line to the 2 side (hereinafter, referred to as an extension communication path 21 when collectively referred to, and referred to as an extension communication path 21a, 21b, 2 when partially referred to)
1c), and a third relay Ry3 for switching the outside TEL2 to either the outside line communication path 20 or the extension communication path 21, Ry3.
y4 is an outside line for the melody sending circuit 7 and the outside line communication path 20.
Of the Dp signal transmitting circuit 22 and the relay Ry1 is a fifth relay for switching the external line L, and 8 is an extension communication path 2
1 is a power supply circuit for applying a voltage to S1, and S1 is a tone signal transmitted from the 400 Hz oscillation circuit 5 for the extension communication path 21c-21.
inner TEL1 and outer TEL via a, 21c-21b
Switch for giving to either 2, S2 is 16Hz
A switch for giving a ringing signal transmitted from the oscillation circuit 4 to the ringing tone generating circuit 1-3 of the internal TEL 1 via the extension communication line 21a, and S3 is a switch for transmitting the ringing signal transmitted from the 16 Hz oscillation circuit 4 to the extension communication line 21b. Switch 9 for giving a ringing tone generation circuit 2-3 of the outside TEL2, 9 is an incoming signal detection circuit for detecting an incoming signal of 16 Hz from the outside line via the relay Ry1, and 10 is a control circuit for controlling each part. is there. Also, 11 is the transformer _{T 2} by switching the hook switch HS2 is speaking circuit 2-2 on the basis of the off-hook operation of the outer TEL2 - relay Ry3- hookswitch HS
2-Call circuit 2-2-DC loop detection circuit for detecting DC loop by handset 2-1, 12 is PB signal sent from PB sender 2-5 based on operation of dial key 2-4 of outer TEL2 A PB receiver circuit for detecting a call, 13 is a call key 13-1, which is operated when calling the outside TEL 2, a hold key 13-2, and a communication key which is operated when performing fax communication
13-3, an operation unit consisting of dial keys 13-4, 14 is C
A CCD head control circuit for controlling the CD 15 and the thermal head 16, 17 for RAM, 18 for ROM, 19 for a motor control circuit for controlling the motor M, HS3 for a hook switch interlocking with the hook switch HS1, and 22 for inside the operation unit 13. This is a DP signal sending circuit that sends a dial pulse signal under the control of the control circuit 10 that inputs a dial signal corresponding to the operated dial key 13-4.

The relays Ry1 to Ry5 and the switches S1 to S3 are controlled by the control circuit 10, and the switching state shown in the drawing indicates the initial set state of each relay and switch. That is, the switch S
1 to S3 are turned off, relays Ry1 and Ry2 to the outside line communication path 20 side, relay Ry3 to the extension line communication path 21 side, relay Ry4 to the outside line communication path 20 side, relay Ry5.
Is connected to the relay Ry1 side, and this connection state is an initial state. In addition, 16 Hz oscillator circuits 4 and 40
The operation of the 0 Hz oscillation circuit 5 is also controlled by the control circuit 10. When the modem 6 demodulates the image signal received from the external line L and the control circuit 10 inputs the received image data, CCD head control is performed. While the circuit 14 is controlled to record on the recording paper by the thermal head 16, the image signal from the CCD 15 read from the transmission original is given to the modem 6 by the control circuit 10, modulated, and then sent to the outside line L. When the content of the key operation on the operation unit 13 is recognized by the control circuit 10 and the handset 1-1 of the inner TEL 1 is off-hooked, the hook switch HS.
The hook switch HS3 is turned on in synchronism with 1, and the off hook in the inner TEL1 is recognized by the control circuit 10 based on the on state of the hook switch HS3. When the handset 2-1 is off-hooked in the outside TEL2, the hook switch HS2 is switched to the side of the call circuit 2-2, and the extension call path 21b and the outside TE are connected.
A closed loop is formed between the closed loop and L2, and a current flows in this closed loop based on the voltage applied via the power supply circuit 8. Based on the detected force of the direct loop detection circuit 11 that detects this current, the control circuit 10 Off-hook in TEL2 is recognized. In addition, the extension line 21
By connecting and providing the PB receiver circuit 12 to b,
Based on the detected force of the PB receiver circuit 12, the outside TE
The contents of the operation of the dial keys 2-4 in L2 are to be recognized by the control circuit 10. Further, the control circuit 10 recognizes an incoming call from an outside line based on the detected power of the incoming call number detection circuit 9.

On the other hand, between the inner TEL1 and the outer TEL2, the control circuit 1
By controlling the relays Ry2 and Ry3 by 0, the secret talking function is activated. That is, at the time of making an outgoing call to an external line and receiving an incoming call from an external line, the internal TEL1 and the external T
With respect to the EL2, the person who first off-hooks the handset is given the priority of line capture, and the confidential state for the other is guaranteed. Further, when an incoming call is received from the outside line L, in the initial state shown in the figure, the relay Ry3 is connected to the outside line communication path 20 side, and incoming calls from the outside line L are simultaneously given to the inside TEL1 and the outside TEL2. It is supposed to be.

Next, the basic operation of the facsimile machine will be described with reference to the flowchart of FIG.

First, it is determined whether or not the fax transmission mode is set (step 701). This determination is made in the fax transmission mode by off-hooking the internal TEL 1, dialing, and pressing the communication key 13-3. That is, the off-hook of the inner TEL1 is detected by turning on the hook switch HS3, and then the dial key 13-4 in the operation unit 13 is pressed,
If the DP signal is to be sent as a dial signal, the relay Ry5 is controlled to switch the outside line L to the DP signal sending circuit 22 side, and the DP signal sending circuit 22 responds to the pressed dial key 13-4 to get the outside line L-. The relay Ry5-DP signal sending circuit 22 intermittently connects the DC loop to the DP
The signal is sent to the outside line L. If the PB signal is to be sent as a dial pulse, the PB produced by the modem 6 by controlling the relay Ry1 to switch the external line L to the modem 6 side.
The signal is sent to the outside line L. After that, when the carrier is sent from the facsimile machine on the other side and the communication key is pressed, it is determined that the fax transmission mode is set (step 70).
1). Then, a fax transmission process is performed (step 7).
02). That is, C is controlled by the CCD head control circuit 14.
The CD 15 is controlled, the transmission original is read, this image signal is sent to the modem 6, modulated, and sent to the outside line L via the relays Ry1 and Ry5.

On the other hand, if it is not judged in the fax transmission mode in step 701, it is judged whether or not it is the fax reception mode (step 703). For this determination, for example, after the incoming call is detected, the inner TEL 1 is off-hook, and the communication key 13-3 is pressed, so that the fax reception mode is determined. That is, the incoming call is detected by the output from the incoming call number detection circuit 9, and the off-hook detection of the inner TEL1 is performed based on the ON state of the hook switch HS3 interlocking with the hook switch HS1. Then, the communication key 13-3 in the operation unit 13
When it is detected that the button has been pressed, it is determined to be in the fax reception mode (step 703). Then, a fax reception process is performed (step 704). That is, the relay Ry1 is controlled to switch the external line L to the facsimile main body side, that is, the modem 6 side, and the image signal coming from the external line L is transferred to the modem 6
Is output to the control circuit 10 and recorded on recording paper by the thermal head 16 controlled by the CCD head control circuit 14.

In addition to the above, as a condition for judging the fax reception mode, after going off-hook based on an incoming call at the outside TEL2,
If the incoming call is based on fax communication, outside TEL2
There is a case where a dial operation corresponding to the incoming call transfer (remote incoming call) of the fax communication is detected, but the remote incoming call will be described later.

If it is not judged in the fax reception mode in step 703, it is judged whether or not it is in the TEL mode (step 70).
5). This judgment is made based on the flowcharts shown in FIGS. Then, when it is determined that the mode is any mode, the process of the determined mode is performed (step 706). If the TEL mode is not determined in step 705, the process returns to step 701 again to repeat the determination and processing as described above.

Next, the TEL mode will be described based on the flowchart of FIG.

That is, in the initial state shown in FIG. 1, when the call key 13-1 of the operation unit 13 is pressed and the handset 1-1 of the inner TEL 1 is off-hook subsequently to the press of the call key 13-1, the call key 13-1 is pressed. -1 press output and internal TEL1
The off-hook output of is recognized by the control circuit 10 (steps 203 and 204), and it is determined that the extension communication mode is set. Then, the extension call processing is performed. That is,
The relay Ry2 is switched to the extension communication path 21a side (step 205). The control circuit 10 then switches the switch S3.
Is turned on to control the 16 Hz oscillating circuit 4 to give a ringing signal to the ringing tone generating circuit 2-3 in the outside TEL2 through the extension line 21b and the relay Ry3 (step 206),
The switch S1 is turned on to control the 400 Hz oscillation circuit 5, and the internal TEL is set via the extension communication path 21a and the relay Ry2.
A ringback tone is given to 1 (step 207).
The ringing tone generation circuit 2-3 generates a ringing tone based on the transmitted ringing signal. Outside of the TEL
When 2 is off-hooked, the hook switch HS2 is turned on, so that the extension communication path 21 is formed, a current flows based on the voltage applied from the power supply circuit 8, and the detection by the straight loop detection circuit 11 that detects this current is detected. The off-hook in the outer TEL2 is recognized in the control circuit 10 based on the force. When the off-hook in the outer TEL2 is recognized (step 208), the control circuit 10 causes the inner TEL1 and the outer TEL2 to be detected.
It is determined that a communication path has been established with EL2, switches S1 and S3 are turned off, and the ring back tone transmission to inner TEL1 and the ringing signal transmission to outer TEL2 are stopped (step 209), The mode is changed to the call mode (step 210), and the extension call between the inner TEL1 and the outer TEL2 is enabled.

Even if the call key 13-1 is pressed, if the inner TEL1 is not hooked off in step 204, step 21
Waiting for the end of the time counting by the soft timer (1 minute timer) in 1 to determine the idle mode, perform "clock display" in step 212, and shift to the idle state. Then, the process returns to step 701 in FIG. 7 and the judgment and processing are repeated from the beginning. If the outer TEL2 is not turned off-hook in step 208 even if the outer TEL2 is made to ring by giving a calling signal, step 21
After confirming that the inner TEL1 is on-hook in step 3, it is determined that the mode is the idle mode, and the sending of the ringback tone to the inner TEL1 and the sending of the ringing signal to the outer TEL2 are stopped (step 214). Return.

Next, an extension call operation (inner TEL call) from the outer TEL2 to the inner TEL1 will be described.

That is, when the outer TEL2 is off-hook in the initial state shown in FIG. 1, the off-hook of the outer TEL2 is recognized in the control circuit 10 by the output of the direct loop detection circuit 11 as described above (step 202), and the outer line L is detected.
In addition to being aware that the outside TEL2 was not off-hook as prompted by the incoming calls from the company (step 215),
The process shifts to the "outside TEL mode" in step 216.
FIG. 3 is a flow chart showing this "outer TEL mode". In step 301, after confirming the off-hook state of the outer TEL2 by the output of the direct loop detection circuit 11 as described above, the control circuit 10 turns on the switch S1. When turned on, the dial tone from the 400 Hz oscillation circuit 5 is transmitted to the extension line 21.
It is given to the outside TEL2 through the c, 21b and the relay Ry3 (step 302). And from such a state
When the "3 * key" is pressed by the dial key 2-4 of the EL2, the PB signal based on the "3 * key" is recognized by the control circuit 10 via the PB receiver circuit 12 (step 303), and the extension call is made. The mode is determined and the extension call processing is performed. That is, the relay Ry2 is connected to the extension communication path 2
Switch to the 1a side (step 304). Then, the control circuit 10 turns off the switch S1 to interrupt the transmission of the dial tone to the outside TEL2 (step 305), turns on the switch S2 to control the 16 Hz oscillation circuit 4, and connects the extension line 21a and the relay Ry2. Call signal via T
The ringback tone is sent to the ringing tone generation circuit 1-3 of EL1 (step 306), the switch S1 is turned on to control the 400 Hz oscillation circuit 5, and the ringback tone is transmitted to the extension line 21.
It is given to the outer TEL2 through the relays c, 21b and the relay Ry3. (Step 307). The ringing tone generation circuit 1-3 which receives the ringing signal generates a ringing tone. If the ringing tone prompts the inner TEL1 to go off-hook, the hook switch HS1
The hook switch HS3 is turned on in conjunction with the switching to the call circuit 1-2, and the internal TEL is set in the control circuit 10.
One off-hook will be recognized (step 30).
8). As a result, the control circuit 10 controls the inner TEL1 and the outer TEL1.
It is determined that a communication path has been established with EL2, and switches S1 and S3 are turned off to stop the ringback tone from being sent to outer TEL2 and the calling signal to be sent to inner TEL1 (step 309). The call mode is entered (step 310), and an extension call between the outer TEL2 and the inner TEL1 is enabled.

If the outer TEL2 is hooked on in step 301, the idle mode is determined and the idle state is set.
Even if the inner TEL1 is made to ring by giving a ringing signal, if the inner TEL1 is not off-hooked in step 308, the on-hook of the outer TEL2 is confirmed in step 311, and it is determined that the outer TEL1 is in the idle mode.
Sending ringback tone to EL2 and internal TEL1
The sending of the ringing signal to is stopped (step 312), and the process returns to the idle state. Also, dial key 2-4 of outside TEL2
In place of pressing the "3 * key", press the "5 * key" and press the "5 * key".
When it is recognized by the control circuit 10 via (step 31
4) Judge as the outside TEL outside line mode. And outside TE
L outside line mode processing is performed. That is, the switch S1 is turned off to interrupt the transmission of the dial tone to the outside TEL2 (step 315), and the relay Ry3 is switched to the outside line communication path 20 side to form the DC loop between the outside TEL2 and the outside line L and the relay Ry2. To the extension communication path 21a side,
Outside line TEL2 with inside TEL1 being kept secret from outside TEL2
(Step 316) to connect to "outside TEL outside line mode"
(Step 317) and the outside line call from the outside TEL 2 is enabled.

Next, the external line transfer operation from the inner TEL1 to the outer TEL2 will be described.

That is, in the initial state shown in FIG. 1, the internal TE is transmitted based on a call to the external line L or an incoming call from the external line L.
When L1 is off-hook, the internal TEL1 is output by the output of the hook switch HS3 in the control circuit 10 as described above.
Off-hook is recognized (step 201), the internal TEL mode is determined in step 217, and the process proceeds to the internal TEL processing to enable the communication between the internal TEL 1 and the external line L.
Outside line L to outside TEL2 during outside line communication of this inside TEL1
When the user wants to transfer, the hold key 13-2 in the operation unit 13 is pressed. FIG. 4 is a flow chart showing details of the external line transfer operation from the inner TEL1 to the outer TEL2. Within TE
If the hold key 13-2 is pressed while L1 is off-hook, the off-hook state of the TEL1 is confirmed in step 401, and the press of the hold key 13-2 is recognized in step 402 to control the relay Ry4. Then outside line L
Is switched to the melody sending circuit 7 side, the melody is sent from the melody sending circuit 7 to the outside line L, and the outside line is held (step 403). From this state, the operation unit 13
When the call key 13-1 in the inside is pressed, the press of the call key 13-1 is recognized in step 405 after step 404, and it is determined that the call mode is the extension call mode, and the relay Ry2 is switched to the extension call path 21a side and is also switched. S3 is turned on and a ringing signal from the 16 Hz oscillating circuit 4 is given to the ringing tone generating circuit 2-3 of the outer TEL 2 (step 406).
The ringing tone generation circuit 2-3 generates a ringing tone based on the input of the ringing signal. If the outer TEL2 is off-hooked by the ringing tone, this off-hook is recognized by the output of the direct loop detection circuit 11 in step 407, and the internal call mode is entered (step 408), and the inner TEL1 and the outer TEL2 are switched.
It becomes possible to make an extension call to and from (step 408). Then, by informing that the outside line L is transferred to the outside TEL 2 by this extension line call and the inside TEL 1 is hooked on,
In step 601 shown in FIG. 6, the on-hook of TEL1 is recognized by the output of the hook switch HS3,
In step 603 after step 602, the outside TEL outside line mode is determined after recognizing the outside line holding by the inside TEL 1, and the outside TEL outside line processing is performed. That is, the relay Ry
3 to the outside line communication path 20 side (step 6
04), the relay Ry4 is switched to the outside line communication path 20 side (step 605), and shifts to the "outside TEL outside line mode" (step 606) to enable outside line communication on the outside TEL2.

If the inner TEL1 is hooked on in step 404 shown in FIG. 4, the relay Ry3 is switched to the outside line communication path 20 side to branch the inner TEL1 and the outer TEL2 to the outside line L (step 409). ). in this case,
There may be a case where the person who receives the outside line L at the inside TEL1 moves to the outside TEL2 to make a call on the outside TEL2 side, or a case where the user searches for materials or the like and makes a call again at the inside TEL1. In the former case, the outside TEL2 side is off-hooked. Therefore, if the off-hook is recognized in step 410 by the output of the direct loop detection circuit 11, the outside TEL outside line mode is determined and the outside TEL outside line processing is performed. That is, in step 411, the outside line hold by the internal TEL1 is released, and the confidential communication function is activated to make the relay Ry2 operate in the extension line 2
Switching to the 1a side, the outside TEL 2 and the outside line L are connected, and the mode is changed to the "outside TEL outside line mode" (step 41).
2). In the latter case, since the off-hook is again made on the inner TEL1 side, this off-hook is recognized by the output of the hook switch HS3 at step 413, and the relay Ry3 is switched to the extension communication path 21b side to cancel the parent-child branch (step 414). ). Then, if the hold key 13-2 is pressed again, the pressing of the hold key 13-2 is recognized in step 415, and subsequently, the outside line hold by the inner TEL1 is released (step 416), and the secret story for the outer TEL2 is released. The state is secured, and the call between the internal TEL 1 and the external line L is restored.

Even when the call key 13-1 is not pressed in step 405 and the hold key 13-2 is pressed in step 415 during off-hook in the inner TEL1, the outside line is held by the inner TEL1 in the same manner as described above. After releasing the
Secure the confidential state for L2, inside TEL1 and outside line L
The call with will be restored.

If the outer TEL2 is not hooked off in step 407 shown in FIG. 4, the re-pressing of the calling key 13-1 is recognized in step 417, and the switch S3 is turned off to send a calling signal to the outer TEL2. (Step 4
19) and return to step 404. Also, without pressing the call key 13-1 in step 417, the internal T
Similarly, when EL1 is hooked on, the process returns to step 404 via step 419. Also,
If the inner TEL1 is hooked on in step 401,
Judge as the idle mode and return to the idle state.

Next, the external line transfer operation from the outer TEL2 to the inner TEL1 will be described.

That is, when an incoming call number is given from the outside line L via the relay Ry1, the control circuit 10 recognizes this incoming call number via the incoming call number detection circuit 9, and in the initial state shown in FIG. Ry3 is switched to the outside line communication path 20 side. That is, the inner TEL1 and the outer TEL2 are branch-connected to the outside line L, and the ringing tone generation circuits 1-3 and 2-3 generate ringing tones by the incoming signal.
If this off-ring prompts you to take the outside TEL2 off-hook,
In step 215 shown in FIG. 2, the off-hook state of the outside TEL 2 based on the incoming call number from the outside line L is recognized from the output from the direct loop detection circuit 11, the outside TEL outside line mode is determined, and the outside TEL outside line processing is performed. I do. That is, the relay Ry2 is switched to the extension communication path 21a side to switch the internal TEL1.
After securing the confidential communication state of (1), the mode shifts to the "outside TEL outside line mode" (step 218), and the call between the outside TEL 2 and the outside line L becomes possible. If the "5 * key" is pressed in step 314 shown in FIG. 3, the outside line L from the outside TEL2
To the outside line mode (step 317), and the communication path between the outside line TEL2 and the outside line L becomes possible. Also, when an outside line transfer is made from the inner TEL1 to the outer TEL2, step 6 shown in FIG. 6 is performed.
After 06, it shifts to "outside TEL outside line mode", and outside TEL
2 and the outside line L can be communicated.

If you want to transfer an outside line to the inside TEL1 during an outside line call of the outside TEL2, use the dial key 2-4 of the outside TEL2 to select "3 *".
Key ”. FIG. 5 shows the outer TEL2 to the inner TEL.
6 is a flowchart showing details of an external line transfer operation to the first external line. That is, after confirming the off-hook state of the outside TEL 2 (step 501), it is confirmed whether the outside line call of the outside TEL 2 is based on the incoming call number from the outside line L (step 502). If it is determined in step 502 that the outside line call of the outside TEL2 is not based on the incoming call number from the outside line L, that is, if the outside line call is based on the calling from the outside TEL2, the process returns to step 501. That is, in the case of an outside line call based on a call from the outside TEL2, the outside line transfer to the inside TEL1 cannot be performed. If it is determined in step 502 that the outside line call of the outside TEL 2 is based on the incoming calls from the outside line L,
Go to step 503. Then, when the depression of the "3 * key" is recognized via the PB receiver circuit 12 in step 504 after step 503, it is determined to be the extension call mode, and the extension call processing is performed. That is, the relay Ry4 is switched, and the melody sending circuit 7 sends the melody to the outside line L so that the outside line is not held (step 5).
05), the relay Ry3 is switched to the extension communication path 21b side (step 506), and step 306 shown in FIG.
Interrupt. That is, if a ringing tone is sent to the inner TEL1 and a ringback tone is sent to the outer TEL2 (steps 306 and 307), and the inner TEL1 is off-hook when prompted by the ringing tone from the ringing tone generating circuit 1-3. ,
In step 310 after step 309, an extension call can be made between the outer TEL2 and the inner TEL1. This internal telephone call informs the internal TEL1 that the external line transfer is to be performed, and if the external TEL2 is hooked on, the step 6 shown in FIG.
At 07, the on-hook of the outer TEL2 is recognized by the output of the straight loop detection circuit 11, and at the following step 608, the outer line is held by the outer TEL2, and then the inner TEL is detected.
The mode is judged and the internal TEL processing is performed. That is, the relay Ry2 is switched to the outside line communication path 20 side (step 60).
9), the relay Ry4 is switched to interrupt the transmission of the melody from the melody transmitting circuit 7 to the outside line L to release the hold (step 610), and the switch S1 is turned on to turn on the outside T.
A busy tone (busy tone) is given to EL2 (step 611), and then the mode shifts to "internal TEL mode" (step 612) to enable communication between internal TEL1 and external line L. When the outer TEL2 is off-hook, the busy tone is transmitted to the outer TEL2 by sending the busy tone in step 611.
1 plays a role in informing that the outside line call is in progress.

When the outside TEL 2 receives a facsimile signal from the outside line L (for example, a signal of pee), the PB receiver circuit 12 is pressed by pressing the “7 * key” (transfer key) of the dial key 2-4. The transfer signal is detected at and the remote incoming call becomes possible. That is, step 5
Instead of pressing the "3 * key" at 04, step 5
If the "7 * key" is pressed at 03, the remote reception mode, that is, the facsimile reception mode is recognized, and the relay R
The y1 is controlled to switch the external line L to the facsimile main body side, that is, the modem 6 side (step 507), the relay Ry3 is switched to the internal line 21b side (step 508), and the switch S1 is turned on and off from the 400 Hz oscillation circuit 5. After the busy tone is given to the outer TEL 2 (step 509), the process proceeds to the facsimile receiving process (step 510), the CCD head control circuit 14 is controlled based on the received image signal, and the thermal head 16 records on the recording paper. To do.

Further, when the internal TEL1 is on-hook during an internal call with the internal TEL1 while the external TEL2 is holding the external line, the internal TEL1 is switched in step 601 in the "extension call mode" shown in FIG. On-hook is recognized, and the process proceeds to step 602. When the outside line holding state by the outside TEL 2 is confirmed in step 602, the outside TEL outside line mode is determined and the outside TEL outside line processing is performed.
That is, in steps 604 and 605, the outside TEL2 is switched to the outside line communication path 20 side to release the outside line holding state, the inside TEL1 is switched to the inside communication path 21a side, and the "outside TEL outside line mode" is entered. If the internal TEL1 is on-hook during an extension call between the external TEL2 and the internal TEL1 when the external line is not held, the external TEL mode is determined through steps 601-602-603, and the external TEL mode is determined. Perform processing. That is, within TE
The L1 is switched to the extension communication path 21a side, the outer TEL2 is switched to the outer communication path 20 side, and the "outer TEL mode" is entered.

On the other hand, when the outside TEL2 is on-hook during the extension call with the outside TEL2 in the state where the outside line is held in the inside TEL1, when the outside TEL2 is hooked, the step 61 is performed through the step 61.
Go to 3. Then, when the outside line holding state by the inner TEL 1 is confirmed in step 613, it is determined to be the inner TEL mode, and the inner TEL processing is performed. That is, the outer TEL2 is switched to the extension line 21a side, the inner TEL1 is switched to the outer line 20 side (step 614), and the step 404 in the "inner TEL mode" shown in FIG. 4 is interrupted. In addition, inside TEL without outside line hold
When the outside TEL2 is hooked during the extension call between the outside 1 and the outside TEL2, the inside TEL mode is determined and the inside TEL is selected.
Perform processing. That is, the outside TEL2 is connected to the extension communication path 21b.
The internal TEL1 is switched to the side, a busy tone is given to the internal TEL1 (step 615), the internal TEL1 is switched to the outside line communication path 20 side (step 616), and the mode is changed to the "internal TEL mode" (step 617).

In addition, calling the outer TEL2 from the inner TEL1
It may be performed based on the pressing of the calling key 13-1 following the off-hook of the EL1 and the calling of the inner TEL1 from the outer TEL2 is also performed by the off-hook of the outer TEL2 following the pressing of the "3 * key" of the dial key 2-4. The modification may be freely performed, such as based on the above.

Also, from the inner TEL1 (outer TEL2) to the outer TEL2 (inner T
When calling EL1), at least the outside TE
It suffices if the ringing tone generation circuit 2-3 (1-3) is provided on the L2 (inner TEL1) side, and the ringing tone generation circuit 1-3 (2-3) is necessarily attached to the inner TEL1 (outer TEL2) side. You don't have to.

Further, in the present embodiment, the outer TEL 2 is a PB telephone, but a DP telephone can be similarly controlled.

〔The invention's effect〕

As described above, according to the first aspect of the present invention, in the first aspect of the invention, the built-in telephone is switched to the extension communication path side to call the external telephone based on the calling operation of the built-in telephone to the external telephone. When the external telephone is prompted to go off-hook, a communication path is formed between the external telephone and the built-in telephone. In the second invention, the built-in telephone is built based on the calling operation of the external telephone to the built-in telephone. When the telephone is switched to the extension call path side and the built-in telephone is called, and the built-in telephone is off-hooked by this, a call path is formed between the built-in telephone and the external telephone. In addition to securing the confidential communication function with the attached telephone, it becomes possible to make an extension call between the built-in telephone and the external telephone.

Further, in the third aspect of the invention, when a transfer signal transmitted based on a transfer key operated in response to an external line incoming transfer based on facsimile communication to the facsimile main body by the external telephone is detected, the external line is switched and the facsimile is switched. Since it is connected to the main body, in addition to the effect of the above-described second invention, the external telephone can perform incoming call transfer of facsimile communication, that is, remote incoming call.

[Brief description of drawings]

FIG. 1 is a block circuit configuration diagram showing an embodiment of a facsimile apparatus according to the present invention, FIG. 2 is a flow chart showing a "TEL mode" for explaining the operation of the facsimile apparatus, and FIG. 3 is also an "outer TEL mode". FIG. 4 is a flowchart showing “internal TEL mode”, FIG. 5 is a flowchart showing “outer TEL outside line mode”, FIG. 6 is a flowchart showing “extension call mode”, and FIG. FIG. 8 is a flow chart showing the basic operation of this facsimile machine, and FIG. 8 is a perspective view showing the system configuration of this facsimile machine. 1 ... Built-in telephone (internal TEL), 2 ... External telephone (outer TEL), 3 ... Facsimile body, 4 ... 16 Hz oscillation circuit, 6 ... Modem, 10 ... Control circuit, 12 ... P
B receiver circuit, 13 ... Operation part, 20 ... External line communication path 21, 21a, 21b, 21c ... Internal line communication path, 1-
3, 2-3 …… Ringing tone generation circuit, 2-4 …… Dial keys, 13-
1 ... Call key, Ry1-Ry5 ... Relay, S1-S
3 ... switch, L ... outside line.

Claims (3)

[Claims] 1. A facsimile apparatus which is selectively connected to an external line together with an external telephone having a ringing tone generating circuit and is composed of a built-in telephone and a facsimile body, wherein the external telephone and the built-in telephone are connected. An extension line communication path, an external line communication line connecting the external telephone and the built-in telephone to the external line, a ringing signal generation circuit for outputting a ringing signal to the ringing tone generation circuit, and the external line for the facsimile body and the external line. A first switching means for switching and connecting to either one of the communication paths, and a second switching means for always connecting the built-in telephone to the outside line communication path.
Switching means for connecting the external telephone to the internal communication path at all times, and switching connection to the external communication path based on an external call request and external call reception of the external telephone; The second switching means is controlled on the basis of a calling operation on an external telephone to switch the built-in telephone from the outside call path side to the extension call path side, and the calling signal generating circuit is controlled based on the operation to perform the outside attachment. And a control unit for outputting a ringing signal to a ringing tone generating circuit of the telephone, and a call path is formed between the external telephone and the built-in telephone by off-hooking the external telephone by being prompted by the ringing signal. Facsimile machine characterized by being performed. 2. A facsimile device comprising an internal telephone having a ringing tone generating circuit and a facsimile main body which are selectively connected to an external line together with an external telephone having a dial key, and the external telephone and the internal telephone. An extension line for connecting a telephone, an outside line for connecting the external telephone and a built-in telephone to the outside line, a ringing signal generating circuit for outputting a ringing signal to the ringing tone generating circuit, and the outside line for the facsimile. A first switching means for switching and connecting to either one of the main body and the outside line communication path, and a second for connecting the built-in telephone to the outside line communication path at all times
Switching means for connecting the external telephone to the internal communication path at all times, and switching connection to the external communication path based on an external call request and external call reception of the external telephone; The second switching means is controlled on the basis of a calling operation on the built-in telephone to switch the built-in telephone to the extension communication path, and the ringing signal generation circuit is controlled on the basis of the operation to make the ringing tone generation circuit of the built-in telephone. And a control unit for outputting a call signal, and a call path is formed between the built-in telephone and the external telephone by off-hooking the built-in telephone by being prompted by the call signal. apparatus. 3. The detection circuit according to claim 2, which detects a transfer signal transmitted based on a transfer key operated in response to a call to the built-in telephone set by the external telephone set and an external line incoming call transfer based on facsimile communication to the facsimile main body. When the detection circuit detects a call to the built-in telephone, the control unit controls the second switching means to switch the built-in telephone to the extension communication path side, and at the same time controls the call signal generation circuit to call the built-in telephone. A facsimile machine which outputs a ringing signal to a sound generation circuit and, when the detection circuit detects an outside line incoming transfer, controls a first switching means to switch an outside line to a facsimile main body for connection.