JP2000270122A - Communication device and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely communicate even when another communication device or an ordinary telephone line is connected by deciding whether a communication network is connected outside or whether another communication device is connected and then placing a new in a line closed state. SOLUTION: With operation keys 11-1 to 11-n, whether or not a facsimile machine 1 is connected to PHS(personal handy phone system) 2 or an ordinary telephone line by a cellular cable 5 is decided and inputted. A reception side receives an incoming call by the PHS: 2 through facsimile transmission from an opposite device. Received data are sent as analog supposition sound from an earphone terminal to the facsimile machine 1 through the cellular cable, only a sound signal after a connection with the transmission side is made in response to the incoming call is sent, and no direct current is superposed, so that the facsimile equipment performs automatic reception by detecting a CNG signal from the transmission side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication device and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, as a function of a facsimile machine,
There is an automatic reception function that automatically answers when an incoming call is detected and starts reception.

In order to perform this automatic reception, (1) a method of shifting to facsimile reception when a call signal from a telephone line or a PBX is detected. (2) When a call signal from a telephone line or PBX is detected, the line is closed and a CNG signal (1100 Hz
(0.5 seconds on, 3 seconds off) is detected, and it shifts to facsimile reception. (3) If you have subscribed to F-net, 1300 from F-net
A method that shifts to facsimile reception when an Hz FC signal is detected in the on-hook state. (4) When an answering machine is connected, the facsimile apparatus detects a CNG signal in a state where the answering machine is activated by a calling signal, and when the CNG signal is detected, switches the line to the facsimile side and receives the facsimile. How to transition to. was there.

In the methods (2) to (4), the CNG signal or the FC signal is detected by a tone detector.

[0005] Facsimile communication can be performed by connecting a wireless telephone such as a PHS (Personal Handy Phone System) or a portable telephone to a facsimile apparatus via a cellular cable.

[0006] One side of the cellular cable is a two-wire modular terminal same as a telephone line, and the other side is a mini-pin terminal for connecting an earphone or the like.

When a PHS is connected to a facsimile apparatus using this cellular cable, a mini-pin terminal of the cellular cable is connected to an earphone terminal connection of the PHS, and a modular terminal is connected to a normal telephone line of the facsimile apparatus. Connect to

[0008] In the PHS, a facsimile signal input / output via an earphone terminal is treated as a deemed voice, and is encoded / decoded with 32 kADPCM and communicated like a voice signal.

[0009]

However, when a wireless telephone such as a PHS is connected to a facsimile apparatus for communication, no DC component is superimposed on the output from the earphone terminal of the wireless telephone. Further, since the wireless telephone responds to the incoming call from the network, no ringing signal is output from the earphone terminal, so that the following complicated operation is required to perform facsimile reception.

That is, when an incoming call is detected by the wireless telephone,
After answering the incoming call with the wireless telephone, the facsimile apparatus must be turned off-hook by operating the operation unit of the facsimile apparatus.

When the radio telephone and the facsimile apparatus are not connected, in addition to the above operation, the two apparatuses must be connected using a cellular cable.

This operation is very troublesome and time-consuming, so that when a facsimile reception state is set, the facsimile apparatus on the transmitting side times out and cannot perform facsimile reception.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables reliable communication even if another communication device is connected or a normal telephone line is connected. The purpose is to be.

In order to achieve the above object, the present invention provides a communication device, comprising: a determination unit for determining whether an external communication network is connected or another communication device is connected; The present invention provides a communication device and a control method for the communication device, further comprising control means for setting the communication device in a line closed state in accordance with the determination by the means.

Further, in the communication device, detection means for detecting a signal indicating data communication in an on-hook state, determination means for determining whether or not a communication network is connected via another communication device, and said determination means A communication device and a control method therefor, comprising a determination unit for determining whether or not to perform the detection by the detection unit in accordance with the determination by the detection unit.

Further, in the communication device, detection means for detecting an incoming call, determination means for determining a state of the communication device, and communication in response to the detection by the detection means in response to the determination by the determination means. A communication device having control means for controlling whether or not to start the communication device, and a control method therefor are provided.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is a diagram showing a state in which a facsimile apparatus 1 of this embodiment is connected to a PHS (Personal Handy Phone System) 2 by a cellular cable 5. Reference numeral 1 denotes a facsimile apparatus of the present embodiment, and reference numeral 2 denotes a PHS terminal having an earphone terminal as a voice input / output terminal to which the facsimile apparatus of the present embodiment is connected.

Reference numerals 11-1 to n denote operation keys, which indicate whether the facsimile apparatus 1 of the present embodiment is connected to the earphone terminal of the PHS 2 by the cellular cable 5 or connected to a normal telephone line. Includes a key to enter
Reference numeral 12 denotes a display unit such as an LCD. Reference numeral 13 denotes a speaker unit that issues a warning.

FIG. 2 is a diagram showing a system for transmitting and receiving a facsimile signal as deemed voice using PHS. As shown in FIG. 1, the facsimile apparatus 1 of the present embodiment is connected to the PHS terminal 2 by a cellular cable 5. The PHS2 encodes the facsimile signal from the earphone terminal as deemed voice as 32kADPCM and sends it as a PHS digital data signal to the PHS base station 3, or decodes the digital data received from the base station 3 with 32kADPCM as deemed voice. Output to earphone terminal.

Normally, a PHS base station is connected to ISDN. The facsimile signal is converted into a digital data signal by the PHS terminal 2 and sent to ISDN. Then, at the conversion point between PSTN and ISDN, the signal is returned to an analog facsimile signal again and connected to the other party facsimile device 4 connected to PSTN.

In the facsimile transmission from the partner facsimile apparatus 4 to the PHS terminal 2, the operation on the transmitter side is exactly the same as the transmission to the facsimile apparatus connected to the PSTN. On the receiving side, the PHS terminal 2 first receives a PHS call. The received data is sent to the facsimile apparatus 1 from the earphone terminal through the cellular cable as analog deemed sound. From the earphone terminal, only an audio signal (deemed audio signal) after a connection has been established with the transmission side in response to an incoming call can be transmitted. And regular telephone lines, PBX
DC is not superimposed unlike the analog port of the line or TA (terminal adapter). For this reason, the conventional facsimile apparatus cannot perform automatic reception when connected to the PHS, but the facsimile apparatus of the present embodiment can detect and automatically receive a CNG signal from the transmission side as described below. Therefore, in this embodiment, if the incoming call is answered by the PHS2, the facsimile device 1 and the PHS
If you connect the 2 earphone terminals, you can receive facsimile.

Next, a facsimile apparatus according to the first embodiment will be described with reference to FIG.

A CPU 101 controls the entire facsimile according to a program stored in the ROM 102. Reference numeral 103 denotes a RAM including a DRAM and an SRAM. The work area 103a and the image memory 103c of the CPU are mapped to addresses of the DRAM. The registration data 103b such as the telephone number of one-touch dialing or abbreviated dialing, and the status such as whether the facsimile apparatus is connected to a telephone line or connected to an earphone jack of a PHS are mapped to the SRAM.

Reference numeral 104 denotes a reading unit for reading an original; and 107, a recording unit for recording a received image or an image read by the reading unit 104. An operation unit 105 includes operation keys (11-1 to n in FIG. 1) for various operations, a display unit such as an LCD (12 in FIG. 1), and a speaker unit (e.g., a key input sound and a warning sound). 1) of FIG.

Reference numeral 108 denotes image data read by the reading unit 104 or image data read from the image memory 103c, encoded into codes such as MH, MR, and MMR, and received facsimile image data and image memory 103.
An encoding / decoding unit that decodes the encoded image data of c from codes such as MH, MR, and MMR.

Reference numeral 109 denotes a modem for performing facsimile transmission / reception, and reference numeral 110 denotes an NCU for controlling connection with the line 111. The NCU will be described later in detail. When the facsimile apparatus is connected to a voice input / output terminal of a wireless terminal such as a PHS as shown in FIG.
11 is a cellular cable.

FIG. 4 shows the facsimile apparatus 1 of this embodiment.
FIG. 2 is a diagram illustrating an NCU 110 and a modem 109.

Reference numeral 201 denotes a CML relay for switching the line 208 between a telephone side (telephone connection interface 209 side) and a fax side (modem side); 202, a pulse relay (P relay) for generating a dial pulse; and 203, a DC loop. RET coil or an electric circuit having the same function as the RET coil, 204 is a DC cut capacitor for supplying only an AC component to a transformer 205, and 205 is a 600Ω: 600Ω transformer for separating a line from a facsimile (modem).

Reference numeral 206 denotes a 2-wire to 4-wire conversion circuit for dividing the output of the transformer 205 into a transmission side (TX) and a reception side (RX). 216 is a call signal detection circuit for detecting a call signal, 211 is a transformer, and 212 is a capacitor for cutting direct current. 207 is FC from F-net
This is a tone detection circuit that detects signals (1300 Hz).
0 is its output. This tone detection circuit 207 is a PLL
The frequency to be detected is determined by the time constant of the external resistor 213 and the capacitor 215. (F ≒ 1 / RC: R is a resistance value, C is a capacitance) In this embodiment, the capacitor 215 is a 0.056 μF film capacitor, the resistance 213-a is 13.7 kΩ, and the resistance 213-
b is 16.2 kΩ. If the facsimile machine is connected to a normal line such as PSTN or PBX, switch 214
Selects the resistor 213-b, and the detection frequency of the tone detection circuit 207 becomes 1300 Hz.

When connected to a voice input / output terminal such as an earphone terminal of a PHS (or mobile phone) by a cellular cable or the like, the switch 201 is switched to the fax side, and the voice input / output terminal of the PHS (or mobile phone) is connected. The modem 217 detects a CNG signal (1100 Hz) transmitted as deemed voice, and upon detecting CNG, facsimile reception is performed.

A line connection terminal 218 connects the NCU 110 and the line 208. Even if the line 208 is a telephone line,
You can also connect with a cellular cable.

FIG. 5 is a flowchart showing the operation of the facsimile apparatus of this embodiment at the time of automatic reception. In this flowchart, the modular terminal of the cellular cable is connected to the line connection terminal of the facsimile apparatus of the present embodiment, and the earphone terminal of the cellular cable is connected to the earphone connection terminal of a PHS (or mobile phone) in the deemed voice communication mode. , C output from the PHS earphone connection terminal
When the modem 217 built in the facsimile apparatus detects the NG signal, the processing shifts to facsimile reception.

In the standby state, the facsimile machine 1
It is checked whether or not a PHS (or a mobile phone) is connected to the line connection terminal (step S501).
If it is determined in step S501 that the PHS is connected, the process advances to step S502 to turn on the P relay 202 and switch the CML relay 201 to the fax side (modem side). Next, in step S503, the CNG is output by the modem 217 capable of detecting a tone.
Check if the signal (1100Hz) is detected.
Since the CNG signal is on for 0.5 seconds and off for 3 seconds, the CNG signal can be detected depending on whether or not the state has changed with this cadence. If a CNG signal is detected in step S503, the process proceeds to step S504 to perform facsimile reception processing. If a CNG signal is not detected, the process returns to step S502.

FIG. 6 is a flowchart of the facsimile receiving process in step S504 in FIG. Although detailed description is omitted in FIG. 6, ITU recommendation T. The flowchart is based on 30.

In step S601, when the process proceeds to the receiving process, CED and DIS are transmitted. Next, DCS is detected (step S602). If DCS is detected, step S60
The process proceeds to step 3 to determine whether or not the result of the training is OK. If the result is OK, the CFR is returned (step S604), and image reception is started (step S606). If NG, FFT is returned (step S605), and the process returns to step S603.

During the image reception, it is checked whether or not the image reception has been completed (step S607). If the image reception has not been completed, the image reception is continued.

As described above, according to the present embodiment, it is determined whether a wireless communication device such as a PHS or the like is connected or a normal telephone line is connected. , The automatic reception can be reliably performed.

(Embodiment 2) In this embodiment, a specific example for determining whether a wireless communication device such as a PHS or the like or a normal telephone line is connected will be described.

The facsimile apparatus of this embodiment has basically the configuration described in the first embodiment.

In the present embodiment, the setting of a device connected to the line connection terminal of the facsimile apparatus (normal telephone line, PHS (or mobile phone), etc.) in accordance with the user's usage method by operating the operation keys of the operation unit Earphone jack?)
Is made possible.

A dedicated key may be assigned to the operation key for making this setting, or user data may be switched by operating a function key.

FIG. 7 is a flowchart of automatic reception in the facsimile apparatus of this embodiment. This flowchart shows that the facsimile apparatus of this embodiment is connected to the PHS via a cellular cable,
One that receives a facsimile by detecting an NG signal, one that is connected to a normal telephone line and that receives a facsimile by detecting an FC incoming call (1300 Hz) with a tone detector,
When a call signal is detected, the process immediately shifts to facsimile reception. Of course, the CNG signal may be checked after the detection of the calling signal, and so-called F / T switching may be performed.

In FIG. 7, in the standby state, the PSTN
It checks whether it is connected to a normal line such as a PBX or PBX, or whether it is in “deemed voice communication mode” connected to the earphone terminal of the PHS (or mobile phone) by monitoring the key operation of the operation unit ( Step S701). The switching to or from the “deemed voice communication mode” is performed by input from the operation unit, and the input mode is stored in the registration data area 203-b as registration data. Step S7 when the “deemed voice communication mode” is set
02, turn on the P relay 202 and turn on the CML relay 20
1 is switched to the fax side (modem side). Next, step S70
The CNG signal (110
0Hz) is detected. CNG signal is
Because it is on for 0.5 seconds and off for 3 seconds, the CNG signal can be detected depending on whether or not the state has changed with this cadence. If a CNG signal is detected in step S703, step S703 is executed.
Proceeding to step 704, a reception process is performed.
If a CNG signal is not detected in step S702, the process returns to step S702.

In step S701, if the deemed voice mode is not set, the flow advances to step S705 to determine that a normal telephone line is connected, and to enable the tone detection circuit 207 to detect the FC signal (1300 Hz). It is checked whether or not an FC signal (1300 Hz) has been detected in step S706. Next, if an FC signal (1300 Hz) is detected in step S706, the flow proceeds to step S708 to perform automatic reception processing. If not, the flow proceeds to step S707. In step S707, the call signal detection circuit 216 checks whether there is an incoming call. If there is an incoming call, the process proceeds to step S708 to perform an automatic reception process. If no incoming call is detected, the process returns to step S701.

As described above, the CNG signal may be detected after the incoming call is detected in step S707, and the reception process may be performed when the CNG signal is detected.

Steps S704 and S708
Is exactly the same as in FIG.

By the way, in this embodiment, the CNG from the transmitting side is
Set the detection frequency of the modem circuit to 11 so that the signal can be detected.
00 Hz, but if the PHS side sends some tone signal from the earphone terminal indicating facsimile reception by deemed voice (PHS side can switch facsimile reception by, for example, answering machine setting) The detection frequency of the modem may be adjusted to the frequency of the tone signal.

As described above, according to the present embodiment, since the operation of the facsimile apparatus is changed by the setting by operating the facsimile apparatus, the automatic reception can be reliably performed.

Embodiment 3 In this embodiment, the type of line connected to the line connection terminal of the facsimile apparatus (whether a normal telephone line is connected or a cellular phone for connecting a wireless telephone such as PHS) An example of automatically determining whether the cable is connected) will be described.

FIG. 8 is a diagram showing an NCU and a modem of the facsimile apparatus in this embodiment. In FIG. 8, a polarity detection circuit 801 is added. The polarity detection circuit 801 is necessary when supporting an additional service such as a dial-in service or a number display service, and can detect the reversal of the polarity of the telephone line. This polarity detection circuit is constituted by a photocoupler, and detects the polarity of the line 208. Reference numeral 802 denotes a resistor, which is 1.1 MΩ in this embodiment. Reference numeral 803 denotes an output of the polarity detection circuit 301. When the polarity of the line is L1 is positive and L2 is negative, 803-a = L (low);
803-b = H (high), and when L1 is negative and L2 is positive, 803-a = H and 803-b = L. When there is no DC component and no polarity, as in the case of connection to the earphone terminal of PHS, both 803-a and 803-b become H. Therefore, by monitoring this output, it can be determined whether the terminal is connected to a normal line such as PSTN or PBX, or is connected to the PHS or an earphone terminal of a mobile phone.

FIG. 9 is a flowchart of automatic reception in the facsimile of this embodiment. This flowchart also shows the case where the facsimile apparatus of this embodiment is connected to a PHS via a cellular cable and receives facsimile by detecting a CNG signal, and the case where the facsimile apparatus is connected to a normal telephone line and an FC signal from the F-net This is an explanation of the case where the facsimile reception is immediately started when the paging signal is detected.
The G signal may be checked and so-called F / T switching may be performed.

In FIG. 9, in the standby state, the output 803 of the polarity detection circuit 801 is checked (step S901). At this time, if a telephone line is connected to the line connection terminal 218 of the facsimile machine, the polarity can be detected, and the PHS (or mobile phone) can be detected using the earphone terminal.
The polarity cannot be detected in the "deemed voice communication mode" connected to the. If no polarity is detected, step S902
To turn on the P relay 202 and turn on the CML relay 201
Switch to fax side (modem side). Next, in step S903, the CNG signal (1100H
Check if z) is detected. Step S90
If a CNG signal is detected in step 3, the process proceeds to step S904 to perform reception processing. If a CNG signal is not detected in step S903, the process returns to step S902.

If the polarity is detected in step S901, it is determined that the telephone line is connected, and the flow advances to step S905 to switch the switch 214 to the resistor 2
Switch to 13-a side so that tone detection circuit 207 can detect FC signal (1300Hz) from F-net
If an FC signal (1300 Hz) is detected in step S906, step S
The process proceeds to step 907 to perform an automatic reception process, and if not detected, the process proceeds to step S908. In step S908, whether there is an incoming call is checked by the call signal detection circuit 216. If there is an incoming call, the process proceeds to step S907 to perform automatic reception processing. If no incoming call is detected, the process proceeds to step S90.
Return to 1.

As described above, after the incoming call is detected in step S908, the CNG signal may be detected, and the reception process may be performed when the CNG signal is detected.

The reception processing in steps S904 and S907 is the same as that in FIG.

As described above, according to this embodiment, the type of the line connected to the line connection terminal is determined based on the polarity of the line connected to the line connection terminal, and the operation of the facsimile apparatus is determined according to this determination. Since it is changed, automatic reception can be performed reliably.

(Embodiment 4) In this embodiment, the type of the line connected to the line connection terminal (whether an ordinary telephone line is connected or a wireless telephone such as a PHS Is automatically determined whether or not a cellular cable for connection is connected).

In this embodiment, the discrimination control is performed by detecting an audible sound (tone signal) transmitted from the telephone line. From the telephone line, a continuous tone signal of about 400 Hz or an intermittent tone signal of about 400 Hz is transmitted as an audible sound.

This audible sound (tone signal) is detected by a tone detection circuit 207 of the facsimile apparatus.
The NCU described in FIG. 4 may be used, or the NCU described in FIG. 8 may be used.

FIG. 10 is a flowchart for performing facsimile reception by audible sound detection in this embodiment.

In the standby state, the CML relay 201 is connected to the telephone (T1, T2).

In step S1001, it is checked whether or not an audible sound (tone signal) is detected by the tone detection circuit 207. At this time, if a telephone line is connected to the line connection terminal 218, an audible sound (tone signal) can be detected, and if a cellular cable is connected via an earphone terminal of a PHS (mobile phone), an audible sound (tone signal) can be detected. Tone signal) is not detected.

If no audible sound (tone signal) is detected in step S1001, the flow advances to step S1002 to turn on the P relay 202 and switch the CML relay 201 to the fax side (modem side). Next, in step S1003, it is checked whether a CNG signal is detected by the modem 217 capable of detecting a tone signal. C in step S1003
If an NG signal is detected, the process proceeds to step S1004 to perform reception processing. If a CNG signal is not detected, step S1002
Return to

If a tone signal is detected in step S1001, it is determined that a telephone line is connected to the line connection terminal, and the flow advances to step S1005.
The switch 214 is switched to the resistor 213-a side so that the tone detection circuit 207 can detect the FC signal (1300 Hz).

Then, in step S1006, the FC signal (130
If 0 Hz) can be detected, the flow proceeds to step 1007 to perform an automatic reception process. If the FC signal cannot be detected, the flow proceeds to step S1008 to detect an incoming call by the call signal detection circuit 216. If an incoming call can be detected in step S1008, an automatic reception process is performed in step S1007.
If no incoming call is detected, the process returns to step S1001.

After the incoming call is detected in step S1008, the CNG signal may be detected, and the reception process may be performed when the CNG signal is detected.

The receiving process in step S1004 and the receiving process in step S1007 are the same as those in FIG.

In this embodiment, the tone signal detecting circuit 2
Although the audible sound (tone signal of about 400 Hz) from the telephone line is detected by 07, the tone signal detection function of the modem 217 may be used.

As described above, according to the present embodiment, the type of the line connected to the line connection terminal is determined by detecting the audible sound (tone signal) from the telephone line, and the facsimile apparatus is operated in accordance with the determination. Since the operation is changed, automatic reception can be performed reliably.

(Embodiment 5) In this embodiment, when the setting of the line connected to the line connection terminal by the operation key of the operation unit of the facsimile apparatus is wrong (for example, when the user is connected to the line connection terminal) After performing the settings when the line being used is a cellular cable connected to the earphone terminal of the PHS (set to the deemed voice communication mode),
An example will be described in which a warning is issued to the user when a telephone line is connected by mistake).

In this embodiment, the NCU described with reference to FIG. 8 is used, and a method similar to that of the third embodiment is used (the polarity detection circuit 80).
1), the line connected to the line connection terminal 218 is determined.

FIG. 11 is a flowchart of a warning operation in the facsimile apparatus of this embodiment.

In the standby state, it is checked whether or not a setting for setting the “deemed voice communication mode” to be ON / OFF has been input through the operation unit 105 (step S1101).
If it is determined in step S1101 that the deemed voice communication mode is set, the process advances to step S1102 to turn on the P relay 202 and switch the CML relay 201 to the fax side (modem side). Next, in step S1103, it is checked whether a line is connected to the line connection terminal 218. If the line is not connected, the process returns to step S1102,
When the line is connected, the process proceeds to step S1104, and the polarity detection circuit 801 detects the polarity. This polarity detection circuit 801 is configured by a photocoupler and detects the polarity of a line. Reference numeral 802 denotes a resistor, which is 1.1 MΩ in this embodiment.
It is. Reference numeral 803 denotes an output of the polarity detection circuit. If the line polarity is L1 is positive and L2 is negative, 803-a = L, 803-b
= H, L1 is negative, and L2 is positive, 803-a = H, 8
03-b = L, and when there is no DC component and no polarity, as in the case where a cellular cable is connected using the PHS earphone terminal, both 803-a and 803-b become H. Therefore, by monitoring this output, it can be determined whether the connection to the line connection terminal 218 is a telephone line or whether a cellular cable is connected using an earphone terminal of a PHS or a mobile phone.

In step S1104, if the polarity is detected, the line connection terminal 2 is set in spite of the fact that the deemed voice communication mode is set by operating the operation unit 105.
Since a telephone line is connected to step 18, step S 1
At 105, the user is urged to issue a warning (a visible warning by the LCD unit, an audible warning by the speaker unit, etc.).

If no polarity is detected in step S1104, a CNG signal is detected in step S1110, and if a CNG signal is detected, reception processing is performed in step S1111.

If the deemed voice communication mode is not set in step S1101, the tone signal detection circuit 207 is set to detect the FC signal (1300 Hz). If the FC signal is detected in step S1107, the reception is performed. If processing is performed and no FC signal is detected, step S1
At 109, an incoming call is detected. If an incoming call is detected in step S1109, a reception process is performed. Also in the present embodiment, the CNG signal may be detected after the incoming call is detected in step S1109, and the receiving process may be performed when the CNG signal is detected.

As described above, according to the present embodiment, a warning can be issued to the user when the setting by the operation unit and the type of the line actually connected are different.

(Embodiment 6) Also in this embodiment, when the setting of the line connected to the line connection terminal by the operation key of the operation unit of the facsimile apparatus is wrong (for example, when the user is connected to the line connection terminal) After performing the settings when the line being used is a cellular cable connected to the earphone terminal of the PHS (set to the deemed voice communication mode),
An example will be described in which a warning is issued to the user when a telephone line is connected by mistake).

In this embodiment, an audible sound (tone signal: continuous tone signal or intermittent tone signal of about 400 Hz) from the telephone line is detected by the modem 217 and the line connection terminal 218 is detected.
The line connected to is determined.

FIG. 12 is a flowchart of a warning operation in the facsimile apparatus of the present embodiment.

In the standby state, it is checked whether or not the setting for setting the “deemed voice communication mode” to be ON / OFF is input through the operation unit 105 (step S1201).
If it is determined in step S1201 that the deemed voice communication mode is set, the flow advances to step S1202 to turn on the P relay 202 and switch the CML relay 201 to the fax side (modem side). Next, in step S1203, it is checked whether a line is connected to the line connection terminal 218. If the line is not connected, the process returns to step S1202,
When the line is connected, the process proceeds to step S1204, where the modem 217 detects an audible sound (tone signal) from the line.

In step S1204, when an audible sound (tone signal) from the line is detected, a telephone line is connected to line connection terminal 218 even though the deemed voice communication mode is set by operating operation unit 105. Since the connection is established, a warning (visual warning by the LCD unit, audible warning by the speaker unit, etc.) is prompted to the user in step S1205.

If no audible sound (tone signal) is detected in step S1204, CNG is detected in step S1210.
Signal detection is performed, and if a CNG signal is detected, reception processing is performed in step S1211.

If it is determined in step S1201 that the mode is not set to the deemed voice communication mode, the process proceeds to step S1201.
In step 6, the tone signal detection circuit 207 is set to detect an FC signal (1300 Hz). If an FC signal is detected in step S1207, reception processing is performed. If no FC signal is detected, an incoming call is detected in step S1209. Perform If an incoming call is detected in step S1209, reception processing is performed. Also in the present embodiment, the CNG signal may be detected after the incoming call is detected in step S1209, and the receiving process may be performed when the CNG signal is detected.

As described above, according to the present embodiment, a warning can be issued to the user when the setting by the operation unit and the type of the line actually connected are different.

[0086]

As described above, according to the present invention,
Even if another communication device is connected or a normal telephone line is connected, communication can be reliably performed.

Further, with a simple configuration, it is possible to connect another communication device, and it is possible to reliably perform communication when the other communication device is connected.

[Brief description of the drawings]

FIG. 1 is a diagram when a facsimile apparatus embodying the present invention is connected to a PHS.

FIG. 2 is a system diagram when a facsimile apparatus embodying the present invention performs communication using a PHS.

FIG. 3 is a block diagram showing a configuration of a facsimile apparatus embodying the present invention.

FIG. 4 is an NCU of the facsimile apparatus according to the first embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a modem.

FIG. 5 is a flowchart at the time of reception of the facsimile apparatus according to the first embodiment of the present invention.

FIG. 6 is a flowchart at the time of reception of a facsimile apparatus embodying the present invention.

FIG. 7 is a flowchart at the time of reception by the facsimile apparatus according to the second embodiment of the present invention.

FIG. 8 is an NCU of the facsimile apparatus according to the third embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a modem.

FIG. 9 is a flowchart at the time of reception of the facsimile apparatus according to the third embodiment of the present invention.

FIG. 10 is a flowchart at the time of reception by the facsimile apparatus of Embodiment 4 of the present invention.

FIG. 11 is a flowchart at the time of reception by the facsimile apparatus of Embodiment 5 of the present invention.

FIG. 12 is a flowchart at the time of reception by the facsimile apparatus of Embodiment 6 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 PHS 5 Cable 11-1 to n Operation key 12 Display 13 Speaker

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Naoto Akimoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Tomoyuki Takeda 3- 30-2 Shimomaruko, Ota-ku, Tokyo Incorporated (72) Inventor Akira Yamaguchi, 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takehiro Yoshida 3-30-2, Shimomaruko, Ota-ku, Tokyo Canon Inc. F term (reference) 5C062 AA02 AA30 AA32 AA37 AC35 AE14 5C075 AB06 AB08 BB04 CA01 5K101 KK01 LL01 LL12 QQ11 RR22 UU01 UU05 UU06 UU11 UU20

Claims (18)

[Claims] 1. A communication device, comprising: a determination unit configured to determine whether a communication network is connected to an external device or another communication device; and a communication device configured to control the communication device according to the determination performed by the determination unit. A communication device comprising control means for setting a line closed state. 2. The communication device according to claim 1, wherein the communication device is configured to detect a first signal in an on-hook state, and to perform detection by the first detection unit in accordance with control by the control unit. A communication device comprising a determination unit for determining whether to perform the communication. 3. The communication device according to claim 1, wherein the communication device includes: a second detection unit configured to detect a second signal indicating data communication transmitted after the incoming call signal from the communication network; According to the control, the second signal is detected after the incoming signal is detected, or the second signal is determined without detecting the incoming signal. A communication device comprising a determination unit. 4. The communication device according to claim 1, wherein the determination unit performs the determination according to a setting by an operator. 5. The communication device according to claim 1, wherein the determination unit performs the determination based on a polarity of a communication line connected to the communication device. 6. The communication device according to claim 1, wherein the determination unit performs the determination based on whether a predetermined audible sound is transmitted from a communication line connected to the communication device. . 7. The communication device according to claim 1, wherein the communication device sets, by an operation of an operator, whether an external communication network is connected or another communication device is connected; A communication device for providing a predetermined notification when the setting by the device and the determination by the determination device are different. 8. A communication device, comprising: detection means for detecting a signal indicating data communication in an on-hook state; determination means for determining whether or not a communication network is connected via another communication apparatus; A communication device comprising: a determination unit that determines whether or not to perform the detection by the detection unit in accordance with the determination by: 9. A communication device, comprising: detecting means for detecting an incoming call; determining means for determining a state of the communication device; and performing communication in response to the detection by the detecting means in response to the determination by the determining means. A communication device comprising control means for controlling whether or not to start. 10. A method for controlling a communication device, comprising: a discriminating step of discriminating whether a communication network is connected to an external device or another communication device is connected; A method for controlling a communication device, comprising a control step of bringing the communication device into a line closed state. 11. The method according to claim 10, wherein the control method of the communication device includes: a first detection step of detecting a first signal in an on-hook state; and the first detection step according to control in the control step. A method for controlling a communication device, comprising: a determination step of determining whether or not to perform detection in step (a). 12. The method according to claim 10, wherein the control method of the communication device includes: a second detection step of detecting a second signal indicating data communication transmitted after an incoming call signal from the communication network; According to the control in the control step, it is determined whether to detect the second signal after detecting the incoming signal or to detect the second signal without detecting the incoming signal. A method for controlling a communication device, comprising a second determining step. 13. The method according to claim 10, wherein the determining step performs the determining according to a setting by an operator. 14. The control method for a communication device according to claim 10, wherein said determination step performs said determination based on the polarity of a communication line connected to said communication device. 15. The communication device according to claim 10, wherein the determination step performs the determination based on whether or not a predetermined audible sound is transmitted from a communication line connected to the communication device. Control method. 16. The method for controlling a communication device according to claim 10, wherein: a setting step for setting whether a communication network is externally connected or another communication device is connected by an operation of an operator. And a notification step of performing a predetermined notification when the setting in the setting step is different from the determination in the determination step. 17. A method for controlling a communication device, comprising: a detection step of detecting a signal indicating data communication in an on-hook state; a determination step of determining whether a communication network is connected via another communication device; A control method for a communication device, comprising: a determination step of determining whether to perform detection in the detection step according to the determination in the determination step. 18. A method for controlling a communication device, comprising: a detection step of detecting an incoming call; a determination step of determining a state of the communication apparatus; and a response to the detection in the detection step in accordance with the determination in the determination step. A method for controlling a communication device, comprising: a control step of controlling whether to start communication by using a communication device.