JPH11191814A - Communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make communication processing efficient after the arrival of an incoming call in the communication terminal equipment of a called party by utilizing a caller telephone number display service. SOLUTION: A facsimile equipment main body 10 is provided with a signal processing section 11, an incoming call history storage section 13b in an RAM 13, and a telephone number detection section 19a in a processor 19. The telephone number detection section 19a analyzes a line signal from a telephone exchange 32 at the arrival of a call to detect a caller telephone number. An incoming call history table in the telephone number detection section 19a stores many destination telephone numbers and data relating to a class code denoting a type of an opposite party communication terminal equipment corresponding to the telephone number. A type of an opposite terminal is accurately predicted before the arrival of an incoming call based on the caller telephone number detected at the arrival of an incoming call by refereferring to the incoming call history table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device capable of efficiently performing a facsimile communication and a telephone call using a source telephone number display service.

[0002]

2. Description of the Related Art In a communication terminal device (for example, a facsimile device) using a telephone line, after a line is closed between a calling side and a called side, the calling side transmits source information such as its own telephone number. Is transmitted to the called party.

[0003]

Incidentally, Nippon Telegraph and Telephone Corporation (NTT) has been conducting a trial of a caller's telephone number display service in a specific area, and since 1998 this service has been called "Number Display.""Will be implemented nationwide. This caller telephone number display service means that an NTT telephone exchange, which has received a connection request from a calling telephone, sends a calling telephone number to a called telephone in advance (before the line is closed). ), And the caller's telephone handset remains on-hook while the caller's telephone number is displayed on a display provided on the telephone. This allows the called user to:
By looking at the displayed source telephone number, it is possible to select whether or not to answer the call with the ringing ring.

[0004] Incidentally, a similar service has already been implemented in North America as "Caller-ID".
According to the caller ID, as shown in FIG. 5, when transmitting an intermittent call signal C1 (oscillation period: 2 seconds / suspension period: 4 seconds) to the called side based on the calling by the calling side. During the suspension period of the calling signal C1, data on the telephone number of the calling side is simultaneously provided as a 1200 bps modem signal C2. Then, the communication terminal device on the called side extracts and analyzes the modem signal C2 from the line signal C0,
The user of the called side can know the telephone number of the calling side before receiving the call (before the line is closed).

[0005] It is an object of the present invention to provide a communication terminal device which can use the above-mentioned caller telephone number display service to make the communication processing of the called communication terminal device after receiving a call more efficient. To provide.

[0006]

According to a first aspect of the present invention, there is provided a telephone number detecting section for analyzing a line signal from a telephone exchange at the time of an incoming call to detect a telephone number of a calling side, and corresponding to the other party's telephone number. A communication terminal device comprising: a determination unit for determining a type of a communication terminal to be communicated;

[0007] "At the time of receiving a call" means a state in which a line signal (including a call signal) from the telephone exchange has reached the communication terminal device on the called side, but the telephone line has not been closed. . According to the communication terminal device of the first aspect, the telephone number detecting unit detects a telephone number of the calling side by analyzing a line signal from the telephone exchange when receiving a call. The determining unit determines the type of the partner communication terminal corresponding to the telephone number. The storage unit stores the result of the type determination by the determination unit together with the other party telephone number.
As described above, since the other party's telephone number and the type of the other party's communication terminal corresponding to the other party's telephone number are stored in the storage unit, at the time of the incoming call before the line is closed, the telephone number is detected by the telephone number detecting unit. It is possible to determine whether or not the telephone number has already been stored in the storage unit. If the detected telephone number matches the telephone number already stored in the storage unit, the type assigned to the telephone number is used as a clue to determine the type of the calling communication terminal (for example, whether it is a telephone or a facsimile machine). ) Can be accurately predicted.

On the other hand, when the telephone number detected by the telephone number detecting section is not stored in the storage section, the detected telephone number of the other party and the result of the type determination are additionally registered in the recording section. Data volume can be enhanced. It goes without saying that the frequency at which the type prediction of the calling communication terminal device succeeds is affected by the excessive storage amount of data relating to the other party's telephone number and the type code stored in the storage unit.

According to a second aspect of the present invention, in the communication terminal device according to the first aspect, the determination unit determines whether or not the calling side is a non-voice terminal after the line is closed. Assigning a first type representing a facsimile machine to the detected telephone number, otherwise giving a second type representing a telephone,
Further, it comprises a type assigning means for judging whether or not the facsimile communication procedure is established after the line is closed and assigning a third type when the procedure is not established.

[0010] According to the communication terminal device of the second aspect, the telephone number detected by the telephone number detection unit is assigned a first type (a facsimile device) based on whether the calling side is a non-voice terminal. ) Or a second type (representing a telephone), and the detected telephone number and the type are stored in the storage unit as a pair. By repeating the detection of the calling side telephone number, the assignment of the type, and the registration in the storage unit, the amount of data stored in the storage unit is increased,
Alternatively, it is possible to always update (renew) already stored data with the latest information. Also, it is determined whether or not the facsimile communication procedure is established, and if the procedure is not established, the third type is assigned, so that even if the calling communication terminal device cannot easily distinguish between the facsimile device and the telephone, It is possible to respond.

It is to be noted that the determination of whether or not the terminal is a non-voice terminal and the subsequent assignment of the first or second type in the second aspect of the present invention are as follows:
S7 and S8 in the flowcharts of FIGS. 2 and 3 described below.
And S18. The determination as to whether or not the facsimile communication procedure has been established and the assignment of the third type are based on the processes in S22 and S23.

According to a third aspect of the present invention, in the communication terminal device according to the first or second aspect, the result of the type determination stored in the storage unit is determined by an operation from an operation unit provided in the communication terminal device. It can be changed.

According to the communication terminal device of the third aspect, the user can change the type stored in the storage unit to manual by operating the operation unit. Therefore, the degree of freedom in responding to the situation increases.

The advantage of this is particularly great in the communication terminal device according to the second aspect. That is, since the user can replace the type by his / her own judgment, it becomes possible for the human side to follow the part where the machine has not succeeded in automatically determining the type of the calling communication terminal. The convenience of the terminal device is improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a main body 10 of the facsimile apparatus includes a signal processing unit 11 including a central processing unit (CPU), a read-only memory (ROM).
12, a random access memory (RAM) 13 as a writable and readable storage unit, a reading unit 14, a recording unit 15,
A display unit 16, an operation unit 17, a monitor speaker 18, a modem processor 19, a network control unit (NCU) 20, and a timer T are provided.

The apparatus main body 10 is provided with an attached telephone 31. The handset (so-called handset) is removed from the attached telephone 31 (off-hook state)
A hook switch 31a is provided for detecting whether the hook is engaged (on-hook state). The hook switch 31a provides a hook state detection signal according to the state of the handset to the signal processing unit 11 of the apparatus main body 10.

The ROM 12 in the apparatus main body 10 stores various control programs for controlling the apparatus main body 10. The signal processing unit 11 controls each unit constituting the apparatus main body 10 according to the various control programs. The signal processing unit 11 includes a determination unit 11a. The determination unit 11a compares a telephone number detected by the modem processor 19 in a specific case described later with a telephone number registered in the RAM 13. In addition to functioning as a number comparing means for comparison, it also functions as a type assigning means for assigning a specific type code to a telephone number detected by the modem processor 19 as described later.

The RAM 13 as a storage unit includes an image data storage unit 13a and an incoming call history storage unit 13b.
The image data storage unit 13a is a memory area reserved for temporarily storing received image data and image data read by the reading unit 14. The incoming call history storage unit 13b is a memory area reserved for storing an incoming call history table (see FIG. 4).

As shown in FIG. 4, the incoming call history table includes fields for "other party telephone number", "registration type", and "latest incoming date and time". It is registered. “Registration type” indicates whether the other communication terminal corresponding to the telephone number is a telephone or a facsimile machine. When the partner communication terminal is a facsimile machine, a type code of “FAX” (first type code) is recorded. When the partner communication terminal is a telephone, a type code of “TEL” (second type code) is recorded. ) Is recorded, and if the other party's communication terminal is both a telephone and a facsimile machine, or if it is not clear whether the communication terminal is a telephone or a facsimile machine, "TEL / FA"
The type code of “X” (third type code) is recorded.
The RAM 13 also temporarily stores various information other than the image data and the incoming call history.

The timer T starts counting based on a start command from the signal processing unit 11, and notifies the signal processing unit 11 of the elapsed time thereafter. For example, the timer T measures the elapsed time from the start of outgoing call or the detection of a specific signal in an external call or the like. Note that the time-up time of the timer T can be set from the signal processing unit 11, and when the elapsed time from the start of the count reaches the set time-up time, the timer T times up the signal processing unit 11. Outputs a signal indicating that the operation has been performed.

The reading section 14 reads an image on a document and outputs black and white binary image data (image data). The recording unit 15 is composed of an electrophotographic printer, and records received image data and image data read by the reading unit 14 on recording paper.

The display 16 is a liquid crystal display (LC).
D) and the like to display various information such as the operation state of the apparatus. The display unit 16 can also display data stored in the incoming call history storage unit 13b so that the user can check the contents of the incoming call history table.

The operation unit 17 includes various operation keys (not shown) such as a ten key (including * and # keys) 17a for inputting a telephone number and the like, a one-touch dial key, and a start key for starting a facsimile communication operation. ). Further, the user can change (rewrite), delete and add data stored in the incoming call history table by operating the keys of the operation unit 17. For example, the other party telephone number “444-4444” in the incoming call history table of FIG.
Type code "TEL / FAX" currently assigned to
Can be changed to either “TEL” or “FAX” at the user's discretion. Further, when the other party's telephone number is changed, the number related to the change can be changed to a new number by key operation.

The monitor speaker 18 emits a ringing sound and a key pressing sound in response to a call from a partner terminal via the telephone line L or a pressing operation of a key such as a numeric keypad. N
The CU 20 is a type of line interface for connecting the facsimile machine body 10 and the attached telephone 31 to an external telephone exchange 32 via the telephone line L. NCU
The basic function 20 is to close and open the telephone line L and detect transmission and reception of dial pulses corresponding to the telephone number and the fax number of the communication terminal 33 (telephone or facsimile machine).

When the other communication terminal 33 is calling and calling me (the facsimile apparatus of the present case), the telephone exchange 32 sends a line signal C0 as shown in FIG. As described above, the line signal C0 includes the call signal C1 having a predetermined oscillation frequency and the modem signal C2 superimposed during the suspension period of the call signal C1.
Thus, data (caller information) relating to the telephone number of the calling side is carried.

The NCU 20 includes a calling signal detection circuit 21, a transformer 22, a switching circuit 23, and an AC coupling unit 24.
It has. The call signal detection circuit 21
2 detects the call signal C1 sent to the facsimile apparatus via the telephone line L,
The signal processing unit 11 is notified that 1 has been detected.

The transformer 22 is arranged at the so-called folded end of the telephone line L, and its primary coil connects the pair of telephone lines L. The secondary coil of the transformer 22 is connected to the modem processor 19. The transformer 22 allows an analog carrier (signal) to be exchanged between the telephone line L and the modem processor 19.

The switching circuit 23 is provided in the middle of the telephone line L, and closes and opens the telephone line L based on a command from the signal processing unit 11. An AC coupling unit 24 is provided in parallel with the switching circuit 23. The AC coupling unit 24 is a series circuit of a resistor and a capacitor,
Even when the telephone line L is opened by the switching circuit 23, an AC analog carrier (for example, the line signal C0) is allowed to be transmitted and received between the modem processor 19 and the attached telephone 31 and the telephone exchange 32.

The modem processor 19 itself has a CP
U, ROM, RAM and the like (not shown) are built in, and can process and analyze signals like a microcomputer. The functions of the modem processor 19 include a function of detecting and generating a protocol signal (for example, a CNG signal) necessary for executing a facsimile communication procedure, a function of generating a push tone signal corresponding to a telephone number of a destination, and , And a function of modulating and demodulating the modem signal C2 and transmission / reception data. Further, in the modem processor 19, a telephone number detecting unit 19a including its own CPU, ROM and RAM is constructed. The telephone number detector 19a detects the modem signal C2 from the analog carrier (the line signal C0 in this case) provided via the transformer 22, analyzes the signal and analyzes the signal to obtain data relating to the telephone number (source information). To the signal processing unit 11
To provide.

In this case, the incoming call procedure and the incoming call after the incoming call when the external communication terminal 33 is on the calling side and the facsimile machine (10, 31) in FIG. There is a feature in updating the history table. This point will be mainly described with reference to the flowcharts of FIGS. The procedure from S6 (meaning of step 6, hereinafter the same) to S17 in FIG. 2 relates to automatic telephone / facsimile switching. Further, the procedure after S20 in FIG. 3 after affirmative (YES) determination in S3 in FIG. 2 relates to incoming call control based on the type code stored in the incoming call history table.

First, when the signal processing section 11 is not performing a transmitting operation, the signal processing section 11 is in a standby state, and waits for detection of a call signal C1 (S1). When the call signal C1 is detected by the call signal detection circuit 21 (that is, an incoming call), the signal processing unit 11 causes the modem processor 19 to capture the modem signal C2 and the telephone number detection unit 19a to transmit the data of the source telephone number. Receive the offer (S2). Then, the determination unit 11a (number comparison unit) in the signal processing unit 11 compares the provided source telephone number with each of the other party telephone numbers registered in the incoming call history table, and determines whether there is a match. Is determined (S3).

If the source telephone number does not match any of the other telephone numbers registered in the incoming call history table, the signal processing unit 11 determines whether or not there is a free memory area in the incoming call history storage unit 13b (ie, whether there is an incoming call). It is checked whether there is room for additional registration in the history table (S4). If there is no free space in the memory of the incoming call history storage unit 13b, the signal processing unit 11 deletes the incoming call history data with the oldest time stamp to create a free space in the memory (S5). For example, assuming that the incoming call history table shown in FIG. 4 is already full, the registration data relating to the other party's telephone number “111-1111” with the oldest incoming call date and time (13:00 on January 1) is deleted.

After the processing in S4 or S5, the telephone line L is closed by the switching circuit 23 (S6). Then, the signal processing unit 11 determines whether or not the modem processor 19 has detected a calling tone signal (CNG signal) (S7). The CNG signal is 110 for 0.5 seconds.
It is a tone signal of 0 Hz and is a signal indicating that the calling side is a non-voice terminal (that is, a facsimile machine).

When a CNG signal is detected in S7, the signal processing section 11 (determination section 11a) registers the source telephone number detected in S2 in the incoming call history table together with the type code of "FAX" and the incoming call date and time. (S8).
Thereafter, facsimile communication (reception of image data) is performed according to a standard method (S9), and after the communication is completed, the telephone line L is released (S10), and the reception processing is terminated.

If no CNG signal is detected in S7, that is, if the calling side is a telephone, the signal processing unit 11
Makes the monitor speaker 18 ring a pseudo bell (S1).
1). At the same time, the timer T is started (S12), and it is determined whether or not the attached telephone 31 is off-hook (S1).
3). The determination in S13 is continued until the timer T times out (S13, S14). Note that the timer T
When the time is up, the pseudo bell ringing by the monitor speaker 18 is stopped (S14a).

If the signal processing unit 11 detects that the attached telephone 31 has been off-hook by the signal from the hook switch 31a before the timer T expires, the sound of the pseudo bell from the monitor speaker 18 is stopped. (S15). Then, the call using the attached telephone 31 (S16) is continued until the attached telephone 31 is hooked (S16, S17).

After the end of the call in S16 or the time-up in S14, the signal processing unit 11 (determination unit 11a)
The source telephone number detected in step 2 is registered in the incoming call history table together with the type code of "TEL" and the incoming date and time (S18). Then, the telephone line L is released (S10).
The receiving process ends.

If the detected source telephone number matches one of the telephone numbers registered in the incoming call history table in the determination in S3, the incoming call date and time of the other telephone number in the incoming call history table are updated. (S3
a). Subsequent reception processing is performed according to the flowchart of FIG. In this case, the signal processing unit 11 (the determination unit 11
In a), first, it is determined whether or not the type code assigned to the other party telephone number that matches the detected source telephone number is “FAX” (S20).

When the type code is "FAX",
The telephone line L is closed (S21), and thereafter, it is determined whether a facsimile communication procedure is established (S22).
Whether the facsimile communication procedure is established or not is determined by a digital command signal (DCS) from the calling side facsimile apparatus.
Signal) has been transmitted. Then, when the facsimile communication procedure is established, facsimile communication (reception of image data) is performed as usual (S
9) After the communication is completed, the telephone line L is released (S10),
The receiving process ends.

On the other hand, if the facsimile communication procedure is not established in S22, the caller telephone number detected in S2 is registered in the incoming call history table together with the type code of "TEL / FAX" and the incoming call date and time ( S2
3). In this case, since the facsimile communication cannot be performed unless the facsimile communication procedure has been established, the signal processing unit 11 sets the signal processing unit 11 to S2 in order to treat it as an incoming call.
7 is performed. This will be described later.

If the type code is not "FAX" in the determination in S20, the signal processing unit 11 (determination unit 11a) assigns the destination telephone number that matches the source telephone number detected in S2. Type code is "TEL / F
AX "is determined (S24).

If the type code is "TEL / FAX", the signal processing section 11 closes the telephone line L (S2).
5) It is determined whether or not the modem processor 19 has detected a CNG signal (S26). CNG in S26
When a signal is detected, the signal processing unit 11 performs facsimile communication (reception of image data) as usual (S9), and after the communication is completed, releases the telephone line L (S10) and ends the reception processing.

If no CNG signal is detected in S26, the signal processing section 11 causes the monitor speaker 18 to sound a pseudo bell (S27). At the same time, the timer T is started (S28), and it is determined whether or not the attached telephone 31 is off-hook (S29). The determination in S29 is continued until the timer T times out (S29, S3
0). When the timer T times out, the sounding of the pseudo bell by the monitor speaker 18 is stopped (S30).
a).

If the signal processing unit 11 detects that the attached telephone 31 has been off-hook by the signal from the hook switch 31a before the timer T expires, the sound of the pseudo bell from the monitor speaker 18 is stopped. (S31). Then, the call using the attached telephone 31 (S32) is continued until the attached telephone 31 is hooked on (S32, S33). Attachment phone 3 at S33
When 1 is on-hook and when the timer T times out in S30, the signal processing unit 11 releases the telephone line L (S10), and ends the reception processing.

The processes from S25 to S33 in FIG. 3 are standby operations for telephone or facsimile communication when the registration type is "TEL / FAX". S
In the determination at S24, if the type code assigned to the other party telephone number that matches the source telephone number detected at S2 is not "TEL / FAX", that is, the type code is "TEL" ( In this case, the signal processing unit 11 causes the monitor speaker 18 to ring the calling bell (S
34), it is determined whether or not the attached telephone 31 has been hooked off (S35).

In step S35, when the signal processing unit 11 detects that the attached telephone 31 has been off-hook by the signal from the hook switch 31a, the ringing of the calling bell is stopped (S36), and the telephone line L is closed. Yes (S3
7). Then, a call using the attached telephone 31 (S3
2) is continued until the attached telephone 31 is hooked on (S32, S33). When the attached telephone 31 is hooked on at S33, the signal processing unit 11 releases the telephone line L (S10), and ends the reception processing.

If the signal processing section 11 cannot detect the off-hook of the attached telephone set 31 in S35, the signal processing section 11 determines whether or not the call signal C1 is intermittently received (S38). As long as the call signal C1 is intermittently received, the signal processing unit 11 repeats the determination in S35 (S35, S38). On the other hand, when the intermittent reception of the call signal C1 is interrupted, the signal processing unit 11 determines that the transmission of the call signal C1 from the telephone exchange 32 has stopped, and stops the ringing of the call bell (S39). . In this way, the reception process is completed without closing the line.

The embodiment described above has the following effects. -Determination unit 1 of signal processing unit 11 in this communication terminal device
1a is a type assigning means, which is a telephone number detecting unit 1 at the time of an incoming call.
While assigning appropriate type codes to the telephone numbers detected by 9a, these are stored in the incoming call history storage unit 13b as appropriate.
For this reason, this communication terminal device has a RAM 1 as a storage unit.
3 can autonomously enhance the amount of data stored in the incoming call history storage unit 13b, or can always update the already stored data with the latest information.

Using the incoming call history table in the RAM 13 as a storage unit, the telephone number detecting unit 1
Based on the calling telephone number detected by 9a, the type of the other party's communication terminal can be grasped to some extent accurately.

The user of the communication terminal device operates the operation unit 1
By operating from 7, the type code in the incoming call history table can be freely changed according to the user's own intention. Therefore, it is possible to always make the registration type in the incoming call history table appropriate and to improve the efficiency of the receiving process. Further, since the setting of the type code can be changed, the convenience of the communication terminal device is improved.

The above embodiment can be modified and embodied as follows. In the above-described embodiment, when the communication device on the calling side is a facsimile device, the facsimile communication is performed without ringing (S3, S4, S6, S7, S8, and the flow of S9, S3, Flow of S20, S21, S22 and S9, and S3, S20, S24, S25, S26
In this case, the incoming call may be automatically received while the pseudo bell is sounded.

In the above-described embodiment, there are three types of type codes, but the fourth, fifth, or sixth type codes may be prepared according to the increase in the types of communication terminal devices using the telephone line L. Good.

The technical ideas other than those described in the claims which can be understood from the above disclosure include the following. Supplementary Note 1: In the communication terminal device according to any one of Claims 1 to 3, the determination unit includes a caller-side telephone number stored in the storage unit, the calling-side telephone number detected by the telephone number detection unit. Number comparing means for judging whether or not the number matches the number, and when the two match, if the type assigned to the matched partner telephone number is the first type indicating the facsimile apparatus, the facsimile Automatically receive an incoming call as communication, and if the type assigned to the matched partner telephone number is the second type representing a telephone, ring the call bell from the monitor speaker without closing the line (FIG. S3 of FIG. 2, S20, S21, S of FIG.
22, S24, S34).

According to this configuration, it is possible to quickly respond to a communication request from the calling side. Supplementary Note 2: In the communication terminal device according to any one of Claims 1 to 3, and after the line is closed, it is determined whether or not the calling side is a non-voice terminal, and the calling side is a non-voice terminal. Is provided with a signal processing unit for automatically performing facsimile communication and sounding a pseudo bell from a monitor speaker when the calling side is not a non-voice terminal (S7, S8, S1 in FIG. 2).
1).

According to this configuration, it is possible to quickly respond to a communication request from the calling side. Supplementary Note 3: In the communication terminal device according to claim 2 or 3, the type assigning means determines whether the calling side is based on whether a modem processor connected thereto detects a calling tone signal (CNG signal). It is determined whether or not the terminal is a non-voice terminal (see S7 in FIG. 2 and S26 in FIG. 3).

According to this configuration, the CN from the telephone exchange can be used.
Using the G signal, the type of the calling communication terminal can be easily determined.

[0057]

According to the first, second, and third aspects of the present invention, the communication terminal device is provided with the telephone number detecting unit, the determining unit, and the storing unit. In addition, the type of the calling communication terminal device can be accurately predicted at a certain frequency, and as a result, communication processing after the line is closed can be performed quickly and efficiently.

According to the second and third aspects of the present invention, since the determination unit of the communication terminal device has the type assigning means,
While assigning the appropriate type to the telephone number detected at the time of the incoming call,
These can be appropriately stored in the storage unit. Therefore,
It is possible to enhance the amount of data stored in the storage unit, or to constantly update data that has already been stored with the latest information, and to autonomously increase the capability of the communication terminal device.

According to the third aspect of the present invention, the type in the storage unit can be changed by an operation from the operation unit provided in the communication terminal device, so that the degree of freedom corresponding to the situation is increased. At the same time, convenience when the user uses the communication terminal device is enhanced.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a facsimile apparatus according to one embodiment.

FIG. 2 is a flowchart (first half) showing a processing procedure after an incoming call;

FIG. 3 is a flowchart (second half) showing a processing procedure after an incoming call;

FIG. 4 is an incoming call history table.

FIG. 5 is a diagram showing an outline of a line signal in a source telephone number display service.

[Explanation of symbols]

10: body of facsimile apparatus, 11: signal processing unit, 1
1a: determination unit (constituting type assignment unit and number comparison unit), 13: RAM (constituting storage unit), 13a: image data storage unit, 13b: incoming call history storage unit, 17: operation unit, 19: modem Processor, 19a: Telephone number detector, 31: Attached telephone (10, 31 constitute a communication terminal device), 32: Telephone exchange, C0: Line signal, C1 ...
Call signal, C2 ... modem signal.

Claims (3)

[Claims] 1. A telephone number detecting section for analyzing a line signal from a telephone exchange at the time of an incoming call to detect a telephone number of a calling side, and a determining section for determining a type of a communication terminal corresponding to the telephone number of the communication partner. And a storage unit for storing a result of the type determination by the determination unit together with the other party's telephone number. 2. The method according to claim 1, wherein the determining unit determines whether or not the calling side is a non-voice terminal after the line is closed, and in the case of a non-voice terminal, assigns a first type representing a facsimile apparatus to the detected telephone number. Otherwise, a type assigning means for assigning a second type representing a telephone, determining whether a facsimile communication procedure can be established after the line is closed, and assigning a third type if the procedure is not established, is provided. The communication terminal device according to claim 1. 3. The communication terminal device according to claim 1, wherein a result of the type determination stored in the storage unit can be changed by an operation from an operation unit provided in the communication terminal device.