JPH08321894A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To provide a facsimile equipment capable of eliminating the charging of unnecessary telephone charge with respect to the incoming call at the time of absence and effectively receiving facsimile. CONSTITUTION: Time until the facsimile equipment automatically responds to the incoming call is set to be long. Then, when a slave telephone set 10 is off-hooked before the facsimile equipment responds, CNG is detected by circuits 4 and 5 monitoring a line signal in a noncontacting manner or through high impedance to a telephone line and when CNG is detected, the line is switched to the side of the facsimile equipment for facsimile communication. On the other hand, when CNG is not detected, the incoming call is judged to be a normal call so that the facsimile equipment is never operated. When the slave telephone set 10 is not off-hooked during a prescribed time, the facsimile equipment responds to the call to start facsimile communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a FAX / TEL automatic switching function in a facsimile machine.

[0002]

2. Description of the Related Art Conventionally, as a technique for automatically switching between a facsimile machine and a telephone for an incoming call,
There were two modes: FAX / TEL automatic switching mode and answering machine connection mode.

In the FAX / TEL automatic switching mode, when a call signal is detected, the facsimile device first captures a line and detects CNG, and at the same time, a pseudo call signal and a pseudo call signal are sent to a child telephone connected to the facsimile device. It calls with a bell sound. If CNG is detected during the call of the sub-phone, the call of the sub-phone is stopped and FA
When X-communication is performed and the sub-phone is off-hook while the sub-phone is being called, it is detected and the line is switched to the sub-phone side.

In the answering machine connection mode, the answering machine is connected to the slave telephone terminal of the facsimile machine. When an incoming call is received, the facsimile machine waits for the answering machine to start up. On the other hand, a non-contact or high-impedance line signal monitor circuit detects CNG, and when CNG is detected, the line is switched to the facsimile machine side to perform FAX communication.

In addition to the above, as reception modes of the facsimile apparatus, there are an automatic reception mode in which a FAX communication is unconditionally performed when an incoming call is received, and a manual reception mode in which no operation is performed even when an incoming call is received.

[0006]

However, in the above-mentioned conventional example, when the user mainly uses the facsimile apparatus as a telephone, the following problems occur.

First, in the FAX / TEL automatic switching mode, when an incoming call arrives, the facsimile machine always seizes the line, and thus the caller is always charged with a call charge. Especially when the user is absent, the call fee will be charged even though the call cannot be made with the other party.
And the call charges will be incurred for the time that the user is called.

In the answering machine connection mode, when the user is absent, facsimile reception cannot be performed unless the answering machine is connected to the facsimile machine and the answering machine is not activated.

In the manual reception mode, as a matter of course, there is an inconvenience that the facsimile reception cannot be performed when the user is absent.

It is an object of the present invention to provide a facsimile apparatus which eliminates unnecessary call charges for incoming calls when absent and allows effective facsimile reception.

[0011]

DISCLOSURE OF THE INVENTION The present invention provides a sub-telephone terminal for connecting a sub-telephone, a call signal detecting means for detecting a call signal, an off-hook detecting means for detecting an off-hook of the sub-phone, and a sub-phone. In a facsimile machine having monitor means for monitoring a line signal during a call by a high impedance or non-contact, and a CNG detecting means connected to the monitor means, when a call signal is detected, an automatic response is made after a predetermined time. When the CNG is detected by the CNG detecting means when the slave telephone is off-hook before the predetermined time has elapsed, the facsimile communication is automatically started.

[0012]

In the present invention, the time until the facsimile machine automatically responds to an incoming call is set long, and if the slave telephone is off-hook before the facsimile machine answers,
CNG is detected by a circuit that monitors the line signal in a non-contact or high-impedance manner with respect to the telephone line, and if CNG is detected, the line is switched to the facsimile device side to perform facsimile communication. Also, CNG
If is not detected, it is determined that the call is a normal call, and the facsimile apparatus does not perform any operation. If the child phone is not hooked off for a predetermined time, the facsimile device responds and performs facsimile communication.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of a facsimile receiving section showing an embodiment of the present invention.

This facsimile apparatus detects a control section 1 for controlling the entire facsimile, a call signal detection section 2 for detecting a call signal from an exchange, and an on-hook / off-hook of a child telephone 10 connected to the facsimile apparatus. A hook detection unit 3, a high-impedance transformer 4 for monitoring a line signal during a call on the child phone 10, and a CNG detection unit 5 for detecting CNG.
A CML relay 6 for switching the telephone line between the child telephone side and the facsimile side, a transformer 7 for separating the line side and the FAX receiving section 8 side, and a FAX receiving section 8 including a modem.
And a timer 9 for measuring time for signal detection.

In the above configuration, when the call signal is detected by the call signal detection unit 2, the time until the facsimile machine responds is set to be long, and the slave telephone 10 is off-hook before the facsimile machine responds. In this case, the high-impedance line monitor circuit (transformer) 4 and the CNG detector 5 detect the CNG, and if the CNG is detected, the CML relay 6 is switched to the facsimile side to perform the facsimile reception. If the child phone 10 is not hooked off within a predetermined time, the facsimile machine automatically responds.

The operation of this embodiment will be described below with reference to the flowchart of FIG.

First, in S101, when the call signal detection unit 2 detects a call signal, a timer (timer T1) for measuring the time until the facsimile automatically responds is started in S102.

In steps S103 and S104, the hook detector 3 detects off-hook of the sub-phone 10 for a predetermined time, and if the sub-phone is off-hook before the predetermined time elapses (before the timer T1 times out), the step S
In step S105, the timer T1 is reset, and in step S106 a timer T2 for measuring the time for newly detecting CNG is started.

Then, in S107 and S108, the CNG detector 5 detects the CNG for a predetermined time (until the timer T2 times out), and the CNG is detected within the predetermined time.
When G is detected, the process proceeds to S109, and facsimile reception is performed.

If the CNG is not detected within the predetermined time, it is determined that the call is a normal call and the CNG detection is stopped. This is because the voice is mistaken for CNG and F
This is to prevent shifting to the AX mode.

Further, in the above S103 and S104,
If the off-hook is not detected within the predetermined time, S11
At 0, the CML relay 6 is switched to the facsimile side, and S1
Proceeding to 11, the operation follows the facsimile reception procedure based on the ITU-T recommendation.

Further, the timer T1 is a T.T. of ITU-T for performing FAX communication. It needs to be shorter than the T1 timer recommended by 30 and needs to be decided according to actual use, but about 20 seconds seems to be appropriate.

Further, the above-mentioned incoming call mode, including the conventional answering machine connection mode, can be selected by the user as the telephone priority mode together with the FAX / TEL automatic switching mode and the manual receiving mode. Specifically, an incoming call mode selection key is provided so that the user can select by this operation.

As described above, the time until the facsimile machine automatically responds to an incoming call is set long, and if the child phone 10 is off-hook before the facsimile machine answers, the telephone line is not connected. By a circuit that monitors the line signal by contact or high impedance, C
NG is detected, and if CNG is detected, the line is switched to the facsimile device side for facsimile communication, and if CNG is not detected, it is determined that the call is a normal call and the facsimile device does not perform any operation. If the sub-phone 10 is not off-hook for a predetermined time, the facsimile device responds to perform facsimile communication, so that when the user is absent, the caller is Does not respond, it is possible to recognize that the other party is absent without incurring a call charge.
In addition, even if the facsimile machine responds after a lapse of a predetermined time, it is possible to determine that the other party is absent when the facsimile machine responds, so the call charge imposed on the caller is the minimum charge. .

Further, when an incoming call for facsimile communication is received and the user takes off the sub-phone 10 off-hook before the facsimile device answers, if the CNG is detected by the line monitor circuit, the facsimile communication is automatically performed. Since the process shifts to, it becomes possible to receive the facsimile without any special operation by the user. If the sub-phone 10 is not off-hook, the facsimile device responds after a predetermined time, so that the facsimile can be received even when the user is absent.

Even when an answering machine is connected to the slave telephone terminal, when an incoming call arrives, the answering machine answers before the facsimile machine answers. Therefore, the line monitor circuit and C
If CNG is detected by the NG detection circuit, it shifts to the facsimile reception mode, and if CNG is not detected,
An ICM (message of interest) will be recorded on the answering machine, and the facsimile machine and the telephone can be switched.

In the above embodiment, if the sub-phone is not off-hook for a predetermined time after the call signal is detected,
Although the system immediately shifts to the facsimile reception mode, the caller may be informed by a voice signal that the user is absent before shifting to the facsimile reception mode, and shifts to the facsimile reception mode.

[0028]

As described above, according to the present invention,
It is possible to eliminate unnecessary call charges for incoming calls when not present and to effectively perform facsimile reception.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Control part, 2 ... Call signal detection part, 3 ... Hook detection part, 4, 7 ... Transformer, 5 ... CNG detection part, 6 ... CML relay, 8 ... FAX reception part, 9 ... Timer, 10 ... Sub-phone.

Claims (5)

[Claims] 1. A slave telephone terminal for connecting a slave telephone,
A call signal detecting means for detecting a call signal, an off-hook detecting means for detecting an off-hook of a sub-phone, a monitor means for monitoring a line signal during a call by the sub-phone by high impedance or non-contact, and a monitor means connected to the monitor means. In a facsimile apparatus having a CNG detecting means, when a call signal is detected, an automatic response is made after a predetermined time, and when the slave telephone is off-hook before the predetermined time elapses, the CNG detecting means causes a CN
A facsimile machine characterized by automatically shifting to facsimile communication when G is detected. 2. The facsimile apparatus according to claim 1, further comprising means for variably setting a time until an automatic response is made. 3. A slave telephone terminal for connecting a slave telephone,
A call signal detecting means for detecting a call signal, an off-hook detecting means for detecting an off-hook of a sub-phone, a monitor means for monitoring a line signal during a call by the sub-phone by high impedance or non-contact, and a monitor means connected to the monitor means. In a facsimile apparatus having a CNG detecting means, when a call signal is detected, an automatic response is made after a predetermined time, and when the slave telephone is off-hook before the predetermined time elapses, the CNG detecting means causes the CNG detecting means to respond.
A facsimile machine having a call receiving mode for automatically shifting to facsimile communication when is detected, and mode selecting means for allowing a user to select this call receiving mode and other call receiving modes. 4. The facsimile apparatus according to claim 3, wherein the other incoming mode includes a FAX / TEL automatic switching mode and a manual receiving mode. 5. A subtelephone terminal for connecting a subtelephone,
A call signal detecting means for detecting a call signal, an off-hook detecting means for detecting an off-hook of a sub-phone, a monitor means for monitoring a line signal during a call by the sub-phone by high impedance or non-contact, and a monitor means connected to the monitor means. In a facsimile apparatus having a CNG detecting means, when a call signal is detected, an automatic response is made after a predetermined time, and when the slave telephone is off-hook before the predetermined time elapses, the CNG detecting means causes the CNG detecting means to respond.
FAX / TEL automatic switching method, which automatically shifts to facsimile communication when is detected.