JP2000092239A - Communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication terminal which efficiently copes with the change of a line network to which it is connected and used even if the communication terminal consists of a main body part having a communication operating part and a call connecting part. SOLUTION: This communication terminal 1000 comprises a main body part 1001 having a communication operating part 1010 which manages control of the entire device and also performs a communication operation and a call connecting part 1013 which is connected to a line network 1019 and also manages a call connection function. Here the terminal has command status interfacing means (C/Si/f) 1011 and 1018 which exchange a command and a status between the main body part 1001 and the call connecting part 1013 and a communication signal interfacing means (communication signal i/f) 1012 which exchanges a signal to be communicated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal comprising a main body for controlling the entire apparatus and a call connection for controlling a call connection function.

[0002]

2. Description of the Related Art Conventional communication terminals include, for example, telephones, communication terminals equipped with a G3 facsimile communication mode,
Most communication terminals and the like using a data modem are connected to a PSTN (Analog Public Line).

When a conversation or communication operation is performed by these communication terminals, it is necessary to start the communication operation after connecting to the destination terminal via the PSTN. That is, when a connection is to be made from the own terminal, a calling operation is performed to the PSTN, and when the partner terminal answers, a conversation or communication is started. When connecting from the destination terminal, the destination terminal performs a call operation,
When the terminal receives and responds to the incoming call signal, it starts conversation and communication.

On the other hand, in recent years, ISDN (Integra
ted Services Digital Netw
ork: integrated service digital network) can be used as much as the PSTN, and the use of ISDN for connecting to the Internet is particularly remarkable.

In the future, a high-speed and high-performance network such as a broadband ISDN is planned.

[0006] Even in the case of these high-performance line networks, it is necessary to connect calls by calling, receiving, answering, and the like as described above in order to perform conversation and communication operations.

[0007] The call connection section of the conventional communication terminal, which operates the call connection by connecting to the above-mentioned line network, is built in the main body and is connected to one fixed line network such as PSTN. are doing.

FIG. 11 is a block diagram showing the internal configuration of a conventional communication terminal. In the figure, reference numeral 1101 denotes a communication terminal, and the communication terminal 1101 includes a CPU (Central Processing Unit) 1102, a ROM (Read Only Memory) 11
03, SRAM (static random access memory) 1104, DRAM (dynamic random access memory) 1105, display unit 1106, operation unit 110
7, reading unit 1108, recording unit 1109, communication operation unit (MODEM: modem) 1110, and call connection unit 1111
, And the call connection unit 1111 is connected to the line 1112.

In the case of the PSTN, the call connection unit 11
As a function of 11, a function of closing a DC loop, a function of converting from four wires to connect to a two-wire line 1112 (two wires and four wires), a function of monitoring a DC loop, and a function of monitoring an incoming call Etc. The call connection unit 1111 is directly connected to the CPU 1
It is controlled by 102.

[0010] With the diversification of circuit networks, a communication terminal capable of performing a call connection operation by connecting to two or more circuit networks, for example, one or both of PSTN and ISDN has been announced. ing.

FIG. 12 is a block diagram showing the internal configuration of such a conventional communication terminal. Referring to FIG.
A communication terminal 1201 includes a CPU (central processing unit) 1202, a ROM (read only memory) 1203, an SRAM (static random access memory) 1204, a DRAM (dynamic random access memory) 1205, and a display unit. 1201, an operation unit 1207, a reading unit 1208, a recording unit 1209, a communication operation unit (MODEM: modem) 1210, a first call connection unit 1211, and a second call connection unit 1212.
Of the first line (for example, PSTN) 1
213, the second call connection unit 1212 connects to the second line (IS
DN) 1214.

Then, the first call connection unit 1211 connects to the first line 1213 to perform a call connection operation. The functions of the first call connection unit 1211 include a function of closing a DC loop, a function of converting from four wires to connect to the first two-wire line 1213 (two wires and four wires), and a function of connecting a DC loop. It has a monitoring function, a function for monitoring incoming calls, and the like. Further, the second call connection unit 1212 connects to the second line 1214 to perform a call connection operation. That is, it has an S / T interface function or a U point interface function and a D channel connection function. First
The call connection unit 1211 and the second call connection unit 1212 are directly controlled by the CPU 1202.

On the other hand, a call connection unit for performing the above-described call connection operation and a communication operation unit for performing the communication operation are integrated, and the communication terminal is connected to the main unit, ie, the data input / output device for communication. In some cases, it is configured.

FIG. 13 is a block diagram showing the internal configuration of such a conventional communication terminal. In the figure, 1300
Is a communication terminal, and the communication terminal 1300
1 and a call connection / communication integrated unit 1311.

A main unit 1301 includes a CPU (Central Processing Unit) 1302, a ROM (Read Only Memory) 13
03, SRAM (static random access memory) 1304, DRAM (dynamic random access memory) 1305, display unit 1306, operation unit 130
7, reading unit 1308, recording unit 1309, and general-purpose i /
f (interface) 1310.

The call connection / communication integrated unit 1311 includes a communication operation unit (MODEM) 1312 and a call connection unit 1
The call connection unit 1313 has a connection 313 and a general-purpose i / f (interface) 1314. The communication operation unit 1312 and the call connection unit 1313 are general-purpose i / f (for example, PCMCIAi / f) 1314, 131
0 and is directly controlled. The functions of the call connection unit 1313 include a function of closing a DC loop, a function of converting from four wires to connect to the first two-wire line 1315 (two wires and four wires), a function of monitoring a DC loop, It has a function to monitor incoming calls.

[0017]

As described above, since the network is diversified, the communication terminal does not need to prepare a portion for connecting to the network and performing a call connection operation according to the network. Not be.

However, for example, in the case of a communication terminal in which a call connection unit and a communication operation unit are integrally formed, the only way to change the line network to be used is to replace the communication terminal itself. A plurality of communication terminals are prepared. When a user installs a network different from the network used up to now, the user must purchase a new communication terminal corresponding to the new network. Alternatively, a terminal adapter corresponding to a new line network may be prepared, but the terminal adapter is expensive and requires labor for connection.

Communication terminals that can connect to two or more circuit networks are convenient because the user can select which network to connect to. However, two or more call connection units are available. Must be provided, the cost increases accordingly, and if there is an unused call connection unit, the communication terminal becomes highly redundant.

Further, even in a communication terminal in which a call connection unit and a communication operation unit are integrally formed, there is no other way than to exchange the communication terminal itself when changing a line network to be used. Multiple devices will be prepared,
When a user installs a network different from the network used so far, the user must prepare a new communication terminal corresponding to the new network.

Even when the user can easily exchange the integrated call connection operation / communication operation unit, it is convenient to change the type of communication operation to be operated simultaneously with the type of the network to be connected. However, if you want to change the type of line network but do not need to change the type of communication, you will have multiple integrated call connection and communication operation units with the same communication function, which will increase costs. The unused call connection operation / communication operation unit is wasted.

The present invention has been made in view of the above-mentioned problems of the above-described conventional technology, and has as its object the configuration including a main body having a communication operation section and a call connection section. An object of the present invention is to provide a communication terminal that can efficiently cope with a change in a line network to be connected and used while being a communication terminal.

[0023]

In order to achieve the above object, a communication terminal according to the present invention is connected to a main body having a communication operation section for controlling the entire apparatus and having a communication operation section and a communication network, and In a communication terminal configured by a call connection unit that manages a call connection function, a command / status interface unit for exchanging commands and status between the main unit and the call connection unit, and a communication signal for exchanging a communication signal Interface means.

Further, in order to achieve the above object, a second aspect is provided.
The communication terminal according to claim 1 is a communication terminal according to claim 1,
The main unit includes request command carrying means for sending a request command for requesting a functional operation of the call connection unit by the command / status interface means.

Further, in order to achieve the above object, a third aspect is provided.
The communication terminal according to claim 1 is a communication terminal according to claim 1,
The call connection unit includes a detection unit that detects a state of a line network connected to the call connection unit, and a notification unit that notifies a detection result of the detection unit to the main body by the command / status interface unit. Features.

[0026] In order to achieve the above object, a fourth aspect of the present invention is provided.
The communication terminal according to claim 1 is a communication terminal according to claim 1,
The main unit includes a communication control unit that performs a communication operation by controlling the communication operation unit and the communication signal interface unit when a call is connected by the call connection unit.

[0027] In order to achieve the above object, the present invention provides a fifth aspect.
The communication terminal according to claim 1 is a communication terminal according to claim 1,
The call connection unit includes a connection unit that connects the communication signal interface unit to a communication channel of a network when receiving a communication channel connection request from the main unit.

Further, in order to achieve the above object, the present invention provides a method for manufacturing a semiconductor device comprising:
The communication terminal according to claim 1 is a communication terminal according to claim 1,
The call connection unit is a call connection unit, and has a switching unit that can exchange the call connection unit depending on the type of communication line.

According to another aspect of the present invention, there is provided a computer system comprising:
The communication terminal according to any one of claims 1 to 5 or 6, wherein the communication terminal is a facsimile machine.

[0030] Further, in order to achieve the above-mentioned object, claim 8
The communication terminal according to claim 7, wherein
The facsimile apparatus is an ISDN (Integrat)
edServices Digital Network
k: an integrated service digital network) connected G3 facsimile machine.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

(First Embodiment) First, the first embodiment of the present invention will be described.
The embodiment will be described with reference to FIGS. FIG.
1 is a block diagram showing an internal configuration of a communication terminal (here, an ISDN-connected G3 facsimile apparatus) according to the first embodiment of the present invention. In the figure, reference numeral 1000 denotes a communication terminal; , The main body 1001,
And a call connection unit 1013.

The main body 1001 includes a CPU (Central Processing Unit) 1002, a ROM (Read Only Memory) 10
03, SRAM (static random access memory) 1004, DRAM (dynamic random access memory) 1005, display unit 1006, operation unit 100
7, a reading unit 1008, a recording unit 1009, a communication operation unit (here, MODEM) 1010, and a command status interface (C / Si / f) 1011.

The CPU 1002 controls the entire communication terminal 1000 including the call connection unit 1013. RO
M1003 stores a program for controlling the main unit 1001. The SRAM 1004 stores parameters and data necessary for the operation of the communication terminal 1000 and the operation of the CPU 1002, and is backed up by a battery. A DRAM 1005 stores image data for facsimile communication. The display unit 1006 displays the state of the communication terminal 1000,
This is for displaying images to be transmitted and received by facsimile. The operation unit 1007 is for the user to perform an operation for designating the operation of the communication terminal 1000 and to register parameters and the like. A reading unit 1008 is for reading a facsimile transmission original or a copy original. The recording unit 1009 prints out a facsimile reception original, a copy original, or a file original. The communication operation unit 1010 includes the call connection unit 10
13 and a communication signal i / f 1012 (for example, an analog signal line) to perform a facsimile communication operation. The C / Si / f 1011 is used to input a command that connects to the call connection unit 1013 and issues a request to the call connection unit 1013, and a status detected by the call connection unit 1013. f.

The call connection unit 1013 includes a CPU (Central Processing Unit) 1014, a ROM (Read Only Memory) 1015, an SRAM (Static Random Access Memory) 1016, a line connection unit 1017, and a command status interface (C / Si / f) 1
018. The line call connection unit 1017 is connected to the line network 1
019. Also, C / Si / f1018
Are connected to C / Si / f 1011 of the main body 1001.

The CPU 1014 controls the call connection unit 1013. The ROM 1015 stores the call connection unit 10
13 is stored. The SRAM 1016 includes the CPU 1014 and the call connection unit 1
It stores parameters and data necessary for the operation of O13. The line connection unit 1017 is connected to a line network (here, I
SDN) 1019 to control call connection (here, I
SDN channel control) and is connected to the communication operation unit 1010 of the main unit 1001 via the communication signal i / f 1012 to communicate a B-channel signal (here, a G3 analog signal) for communicating with the other party's communication terminal. / F101
2 to the communication operation unit 1010. C / Si / f 1018 is the C / Si / f
It is connected to the Si / f 1011 and receives a command indicating a request from the main unit 1001 and outputs a status detected by the call connection unit 1013 to the main unit 1001.

In this embodiment, specifically, communication terminal 1000, which is a G3 facsimile machine,
An example is shown in which communication such as G3 facsimile transmission and reception is performed when a call is received from the communication terminal 1000, and the call is disconnected from the communication terminal 1000 when the communication is completed.

Hereinafter, communication terminal 100 according to the present embodiment
0 will be described with reference to FIGS.

FIG. 2 shows communication terminal 10 according to the present embodiment.
FIG. 3 is a diagram showing the flow of signals and the like in the main unit 1001, call connection unit 1013, and circuit network 1019 in FIG.
FIGS. 5 to 7 are flowcharts showing the flow of the operation of the main unit 1001, and FIGS. 5 to 7 are flowcharts showing the flow of the operation of the call connection unit 1013.

First, the operation of the main body 1001 will be described with reference to FIGS.

In step S301 of FIG. 3, the main body 1001 is connected to the call connection unit 101 by C / Si / f 1011.
Then, it is determined whether or not the status of “call notification” from step 3 has been input. If it is determined that “incoming call notification” has been input, main unit 1001 identifies necessary information included in “incoming call notification”, and determines in step S302 whether incoming call reception is possible. Determine whether or not. And it is not in a state where facsimile communication can be performed, such as performing other operations, out of recording paper, out of recording toner / ink, or failure.
The function is not available due to the contents of the "call notification" (64 kHz unrestricted information transfer capability without data communication function was received)
If the main unit 1001 determines that the incoming call cannot be accepted for some reason, for example, it means that the main unit 1001 cannot accept the incoming call by C / Si / f 1011 in step S303. An “incoming call response non-request” command is output to the call connection unit 1013, and the process proceeds to step S312. Also, when it is determined in step S301 that the "call notification" from the call connection unit 1013 is not input, the process proceeds to step S312.

In step S312, the main unit 100
1 determines whether or not there is a “call request” by a user's operation of the operation unit 1007 or the like. When it is determined that there is a “call request”, the process proceeds to step S313 in FIG.
If it is determined that there is no “call request”, the process returns to step S301.

On the other hand, if the main unit 1001 determines in step S302 that the incoming call can be accepted, the process proceeds to step S304 in which C / Si / f1
011 to the call connection unit 1013 to output a "call response request" command, which means to accept the call.
The process proceeds to the next step S305.

In step S305, the main unit 100
1 outputs a “communication channel connection request” command requesting to connect the communication channel of the line connection unit 1017 to the communication signal i / f 1012 by the C / Si / f 1011 to the call connection unit 1013, and in the next step S306, The communication operation unit 1010 is started. As a result, the main unit 1001 performs a communication operation in the next step S307, that is, the ITU recommendation T.30. Step 30 is performed, and the next step S
Proceed to 308.

In step S308, the main unit 100
1 judges whether or not the communication operation has been completed. If it is determined that the communication operation has been completed, the next step S3
At 09, the "communication channel release request" command for requesting to release the connection between the communication channel of the line connection unit 1017 and the communication signal i / f 1012 by the C / Si / f 1011 and the call to the line network 1019 (ISDN) are disconnected. A call disconnection request command for requesting
After the output to step S3, the process returns to step S301.

On the other hand, if it is determined in step S308 that the communication operation has not been completed, the process proceeds to step S308.
At 310, it is determined whether there is a “call disconnection notification” from the call connection unit 1013 via C / si / f1011. If it is determined that there is no “call disconnection notification”, the process returns to step S308. If it is determined that there is a “call disconnection notification”, the communication operation is terminated in step S311 and the process proceeds to step S309.

If it is determined in step S312 that there is a "call request", the process proceeds to step S313 in FIG.
In step S314, a "call request" command including information such as the destination number is output, and in the next step S314, it is determined whether or not "call connection notification" is present. If it is determined that there is a "call connection notification", the process proceeds to step S305 in FIG.

Next, the operation of the call connection unit 1013 will be described with reference to FIGS.

In step S501 of FIG. 5, it is determined whether there is an incoming call from the line network 1019 to the line connection unit 1017. If it is determined that there is an incoming call, that is, if a SETUP (call setting) signal is received from the ISDN, the line connection unit 1017 detects this and the next step S50.
2, the call connection unit 1013 is connected to C / Si / f 1018
To output a "call notification" status to the main unit 1001, and the process proceeds to the next step S503.

At this time, the status of the “call notification” includes, for example, information transfer capability (voice, digital, etc.), information speed (6
SETUP (call setup) such as 4 kbs and 384 kbs)
And information necessary for the main body 1001.

In step S503, the call connection unit 10
13 judges whether or not a request for “incoming call notification” has been accepted by C / Si / f 1018. And
If it is determined that the request for the “incoming call notification” has not been received, that is, if the “incoming call response non-request” command has been received, the process proceeds to step S504 to perform a call disconnection process on the line network 1019, ie, DISCONNECT (cutting)
A signal is sent to ISDN, and the process proceeds to step S508.
On the other hand, if it is determined that a request for “incoming call notification” has been received, that is, if a “received call response request” command has been received, call connection processing is performed on the line network 1019 in step S505, that is, ALERTING. A (call) signal or a CONNECT (response) signal is transmitted to the ISDN, and a CONNECT ACKNOWLEDGE (response confirmation) signal is received from the ISDN, and the process proceeds to the next step S506.

In step S506, the call connection unit 10
In step S13, it is determined whether or not a “communication channel connection request” command has been received from the main unit 1001 via the C / Si / f 1018. If it is determined that the “communication channel connection request” command has been received, the communication channel of the line connection unit 1017 is connected to the communication signal i / f 1012 in the next step S507. That is, ISDN
B channel is connected to the communication signal i / f 1012 and, consequently, the communication operation unit 1010.
The main unit 1001 including the communication terminal 10 can perform a communication operation with the communication terminal of the other party through the B channel of the ISDN. In step S507, the line connection unit 101
After the communication channel No. 7 is connected to the communication signal i / f 1012, the process proceeds to step S509 in FIG.

On the other hand, if it is determined in step S501 that there is no incoming call from the line network 1019, it is determined in step S508 whether or not there is a "call request" from the main unit 1001. If it is determined that there is a “call request”, the process proceeds to step S513 in FIG.
If it is determined that there is no “call request”, the step S
Go to 501.

On the other hand, if the call connection unit 1013 does not receive the “communication channel connection request” command from the main unit 1001 in step S506, the count may be counted up by the timer counter function of the CPU 1014 and the error may be terminated.

After the processing in step S507 in FIG. 5 is completed, in step S509 in FIG.
No. 3 determines whether a “communication channel release request” command and a “call disconnection request” command have been received from the main unit 1001 via the C / Si / f 1018. When it is determined that the “communication channel release request” command and the “call disconnection request” command are received, in the next step S510, the communication channel of the line connection unit 1017 and the communication signal i /
Release the connection of f1012 and open the network (ISDN) 101
9 to perform a call disconnection procedure. That is, the ISDN B channel and the communication signal i / f 1011, and thus the communication operation unit 1
The connection with 010 is released. Also, the line connection unit 1017
DISCONNECT of ISDN D channel procedure
T (cut), RELEASE (open), RELEASE
COMPLETE (opening completion) is exchanged, and the process returns to step S501 in FIG.

On the other hand, in step S509,
When it is determined that the “communication channel release request” command and the “call disconnection request” command are not received, step S511 is performed.
In, it is determined whether the call has been disconnected from the line network 1019. If it is determined that the call has been disconnected from the line network 1019, the main unit 1 is determined in step S512.
001, the “call disconnection notification” status is output, and the process returns to step S509.

If it is determined in step S511 that the call has not been disconnected from the line network 1019, the process returns to step S509.

If it is determined in step S508 in FIG. 5 that there is a "call request" from the main unit, the process proceeds to step S5 in FIG.
In step 13, a call is made to the line network 1019 based on information such as the destination number included in the "call request", and in the next step S514, it is determined whether or not the call has been successfully connected to the line network 1019 until the call can be connected. If it is determined that the call connection has been established, a “call connection notification” status is output to the main unit 1001 in the next step S515, and
The process returns to step S506 in FIG.

As described above, according to communication terminal 1000 according to the present embodiment, C is a command / status interface means for exchanging commands and status between main unit 1001 and call connection unit 1013.
/ Si / f 1011 and 1018, and a communication signal i / f 1012 which is a communication signal interface unit for exchanging signals to be communicated.
013 for requesting the function operation of the
Has a means for detecting the state of the line network 1019 connected to the main unit 1001 and notifying the detection result from the call connection unit 1013 to the main unit 1001. When the call is connected by the call connection unit 1013, the main unit 1001 Controlling the communication operation unit 1010 and the communication signal interface means to perform a communication operation;
When receiving the communication channel connection request from the main unit 1001, the call connection unit 1013 has means for connecting the communication signal interface unit to the communication channel of the line network 1019, and performs communication by detecting an incoming call from the line network 1019. In the operation example of releasing the line from the communication terminal side,
The call connection unit 1013 specializes in the function of only the call connection operation, and does not need to perform any operation for communication during the B channel connection. That is, the main unit 1001 and the call connection unit 1013
Processing load can be optimally distributed, and meanwhile, a versatile interface enables efficient operation. Therefore, it is possible to realize a compact communication terminal with low redundancy and low cost.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

The internal configuration of the communication terminal according to the present embodiment is the same as that of FIG. 1 of the above-described first embodiment. In addition, since the operation flow of the main unit and the call connection unit in the communication terminal according to the present embodiment is the same as that of FIGS. 3 to 7 of the first embodiment described above, these drawings are used. explain.

FIG. 8 shows main unit 1001 and call connection unit 1 in communication terminal 1000 according to the second embodiment of the present invention.
013 is a diagram showing the flow of signals and the like in the circuit network 1019.

Hereinafter, communication terminal 100 according to the present embodiment will be described.
0 will be described with reference to FIGS.

First, the communication terminal 1000 is connected to the line network 1019.
The detailed description of the operation for performing communication such as G3 facsimile transmission and reception in response to an incoming call from is the same as that of the above-described first embodiment. That is, in the call connection unit 1013, FIG.
The operation from step S501 to step S507 in FIG.
To step S307 to perform facsimile communication (transmission or reception).

When the call is disconnected from the communicating terminal or from the line network 1019 during facsimile communication, first, at step S509 in FIG. 6, the call connection unit 1013 sets the C / Si / No “communication channel release request” command and “call disconnection request” command are received from the main unit 1001 via f1018, and the process proceeds to step S5.
At 11, the call is disconnected from the line network 1019. That is, the line connection unit 1017 is a line network (ISDN) 1019
A DISCONNECT signal is received. Then, the call connection unit 1013 detects it and proceeds to step S5.
In 12, the main body 100 is formed by C / Si / f 1018.
1 to output a "call disconnection notification" status.

On the other hand, in step S308 of FIG.
The main unit 1001 does not end the communication operation, and proceeds to step S31.
0, call connection unit 1 via C / Si / f 1011
Upon receiving the “call disconnection notification” status from 013, the main unit 1001 terminates the communication operation in step S311. That is, the communication operation unit 1010 that performs communication
Stop the operation of.

Subsequently, at step S309, C / S
A “communication channel release request” command requesting that the connection between the communication channel of the line connection unit 1017 and the communication signal i / f 1012 be released by the i / f 1011 and the line network (IS
A “call disconnection request” command requesting a response to the disconnection of the call with the DN (DN) 1019 is output to the call connection unit 1013, and the entire operation of the main unit 1001 in the communication terminal 1000 according to the present embodiment ends.

Finally, in step S509 of FIG. 6, when the call connection unit 1013 receives a "communication channel release request" command and a "call disconnection request" command from the main unit 1001 via the C / Si / f 1018, the call connection unit 1013 proceeds to step S5.
In 10, the connection between the communication channel of the line connection unit 1017 and the communication signal i / f 1012 is released, and the line network (ISD
N) Perform call disconnection procedure for 1019. That is, ISD
The connection between the N B channels and the communication signal i / f 1012, and thus the communication operation unit 1010 is released. Also, the DISC of the ISDN D channel procedure is
ONNECT (cut), RELEASE (open), RE
Exchanges LEASE COMPLETE (release completed).

[0069] Communication terminal 100 according to the present embodiment is described above.
0, the entire operation of the call connection unit 1013 ends.

As described above, according to communication terminal 1000 of the present embodiment, communication is performed by detecting an incoming call from line network 1019, and in the operation example of opening the line from line network 1019, Main unit 1001 and call connection unit 10
13 can be optimally distributed and meanwhile can operate efficiently with a versatile interface. That is, it is possible to realize a low-cost, low-cost, and compact communication terminal that suppresses an increase in cost.

(Third Embodiment) Next, the third embodiment of the present invention will be described.
The embodiment will be described with reference to FIG.

The internal configuration of the communication terminal according to the present embodiment is the same as that of FIG. 1 of the above-described first embodiment, and will be described with reference to FIG. In addition, since the operation flow of the main unit and the call connection unit in the communication terminal according to the present embodiment is the same as that of FIGS. 3 to 7 of the first embodiment described above, these drawings are used. explain.

In the present embodiment, communication terminal 1000, which is a G3 facsimile apparatus, makes a call to line network 1019, performs communication such as G3 facsimile transmission and reception, and terminates the communication. The following shows an example of cutting off.

FIG. 8 shows main unit 1001 and call connection unit 1 in communication terminal 1000 according to the second embodiment of the present invention.
013 is a diagram showing the flow of signals and the like in the circuit network 1019.

Hereinafter, communication terminal 100 according to the present embodiment will be described.
0 will be described with reference to FIGS. 3 to 7 and FIG.

First, when it becomes necessary to perform a calling operation from the communication terminal 1000 by an operation of the operator of the communication terminal 1000, in step S301 of FIG.
01 confirms that “call notification” from the call connection unit 1013 has not been input by the C / Si / f 1011, and in step S 312, determines that there is a call request,
In step S313 of FIG. 4, C / Si / f101
1 outputs a “call request” command to the call connection unit 1013, which means that a call operation is performed. Information necessary for the call connection unit 1013 to make a call, such as the connection number of the destination communication terminal, the call type, and the type of communication, is added to the “call request” command and transmitted to the call connection unit 1013. .

In step S501 of FIG. 5, the call connection unit 1013 confirms that there is no incoming call from the line network 1019, and in step S508, the C / Si / f 1018
When a "call request" command is input from the main unit 1001, the necessary information is identified, and step S51 in FIG.
At 3, the call originating operation is performed for the line network 1019. That is, a SETUP (call setting) signal is assembled using information necessary for making a call, and the ISDN
Sends a SETUP (call setting) signal to the terminal.

In step S514 in FIG. 7, the line connection unit 1017 establishes a connection between the line network (ISDN) 1019 and CALL.
PROCEEDING (call setting acceptance), ALER
TING (call), CONNECT (response), CO
When the NACK ACKNOWLEDGE (response confirmation) is exchanged (or), the line connection unit 1017 is connected to the ISD
N receives a CONNECT (response) from N), it recognizes that the call connection has been established, and the call connection unit 1013 transmits the C / Si / f
After outputting the “call connection notification” status to the main unit 1001 by 1018, the operation described in the first embodiment is performed. That is, in steps S506 and S507 in FIG. 5, and in steps S509 and S510 in FIG. 6, a communication channel is connected to the communication signal i / f 1012 in response to a request from the main unit 1001,
Release the connection and disconnect the call.

In step S 314 of FIG. 4, main unit 1001 transmits call connection unit 101 using C / Si / f 1011.
After inputting the "call connection notification" from step 3, the first
The operation described in the embodiment is performed. That is, FIG.
In steps S305 to S309, each request is output to the call connection unit 1013, and the communication operation unit 1010
Start and stop to perform communication operation.

As described in detail above, according to communication terminal 1000 according to the present embodiment, in the operation example of calling and communicating from communication terminal 1000 to line network 1019 and releasing the line from the terminal, Unit 1001 and call connection unit 101
3, the processing load can be optimally distributed, and meanwhile, a versatile interface can operate efficiently. That is, it is possible to realize an inexpensive and compact communication terminal with low redundancy and low cost.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described.
The embodiment will be described with reference to FIG. Note that the internal configuration of the communication terminal according to the present embodiment is the same as that of FIG. 1 in the above-described first embodiment, and thus the description will be made with reference to FIG. In addition, since the operation flow of the main unit and the call connection unit in the communication terminal according to the present embodiment is the same as that of FIGS. 3 to 7 in the first embodiment described above, these drawings are used. explain.

In this embodiment, communication terminal 1000, which is a G3 facsimile apparatus, makes a call to line network 1019, performs communication such as G3 facsimile transmission and reception, and disconnects the call from line network 1019. Is shown.

Hereinafter, communication terminal 100 according to the present embodiment will be described.
0 will be described with reference to FIGS. 3 to 7 and FIG.

FIG. 10 shows communication terminal 1 according to the present embodiment.
000, a call connection unit 10013,
FIG. 9 is a diagram illustrating a flow of signals and the like in a network 1019.

The call operation and communication operation from communication terminal 1000 to line network 1019 according to the present embodiment are the same as those described in the third embodiment.
This is the same as the embodiment of FIG. Further, in the present embodiment, the operation of disconnecting the call from the line network 1019 is the same as in the above-described second embodiment.

As described in detail above, according to the communication terminal 1000 of the present embodiment, in the operation example of making a call from the communication terminal 1000 to the line network 1019 and communicating, and opening the line from the line network 1019 side. Also, the processing load of the main unit 1001 and the call connection unit 1013 can be optimally distributed, and the versatile interface can operate efficiently between them. That is, it is possible to realize an inexpensive and compact communication terminal with low redundancy and low cost.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described.
An embodiment will be described. Note that the internal configuration of the communication terminal according to the present embodiment is the same as that of FIG. 1 in the above-described first embodiment, and thus the description will be made with reference to FIG. However, in the above-described first embodiment, the line connection unit 1017 operates by connecting to the ISDN, but in the present embodiment, the line connection unit 1017 operates by connecting to the PSTN (public telephone network). And

That is, the line connection unit 1017 has a function of connecting to a line network (PSTN in this case) 1019 to close a DC loop, and a function of converting from four wires to connect to a two-wire network 1019 (two wires). -4 wire conversion), a function of monitoring a DC loop, a function of monitoring an incoming call from the network 1019,
Communication operation unit 1010 of main unit 1001 and communication signal i / f
A communication signal (here, a G3 analog signal) for communicating with the destination communication terminal by connecting at 1012 is converted to a communication signal i / f 101.
And has a function of relaying to the communication operation unit 1010 via the communication unit 2.

Further, communication terminal 100 according to the present embodiment
0, the flow of the main unit 1001, call connection unit 1013, line network 1019 signal, and the like are the same as those in FIGS. 2 and 8 to 10 in the above-described first to fourth embodiments. Also, the flowchart showing the flow of the operation of the main unit 1001 and the call connection unit 1013 in the communication terminal 1000 according to the present embodiment is the same as that in FIGS. 3 to 7 in the above-described first embodiment. Only the parts unique to the present embodiment in each figure will be described.

First, in step S501 of FIG.
An incoming call from the line network 1019 normally receives a 16 kHz sine wave having a certain voltage level (for example, -48 V).
17 detects it, and in the next step S502,
The call connection unit 1013 outputs an “incoming call notification” status to the main unit 1001 via C / Si / f 1018.

At this time, no special information is included in the “call-in notification” status. However, there are a plurality of types of incoming calls connected to the PSTN, such as a non-ringing incoming call of a facsimile network, and the ability to detect them is provided by the line connection unit 101.
7, the type of the incoming call is included in the “incoming call notification” status as information and transmitted to the main unit 1001.

In step S503 of FIG. 5, when the call connection unit 1013 receives the "call-in response non-request" by the C / Si / f 1018, it does not make a call-in response to the line network 1019 in step S504. .

On the other hand, when an “incoming call response request” is received,
In step S505, call connection processing is performed on the network 1019, that is, a DC loop is generated for both the network 1019 by closing an electrical switch or the like.

In step S506 of FIG. 5, the call connection unit 1013 is connected to the main unit 10 via the C / Si / f 1018.
When a “communication channel connection request” command is received from the communication unit 101 in step S507, the line connection unit 101
7 is connected to the communication signal i / f 1012. Here, the 4-wire side of the 2-wire to 4-wire conversion circuit is connected to the signal line of the communication operation unit (MODEM) 1010, and the communication operation unit 1010 The main unit 1010 including the communication terminal can perform a communication operation with the communication terminal of the other party through the PSTN.

Here, the connection between the two-wire / four-wire conversion circuit of the line connection part 1017 and the communication operation part 1010
And the call connection unit 1013 may be always connected from the time of physical connection.

Further, in step S509 of FIG.
Upon receiving the “communication channel release request” command and the “call disconnection request” command from the main unit 1001 via the C / Si / f 1018, the call connection unit 1013 proceeds to the next step S
At 510, the connection between the communication channel of the line connection unit 1017 and the communication signal i / f 1012 is released, and the line network (IS
(DN) 1019. In other words, the DC loop generated with the line network 1019 by the line connection unit 1017 is released.

Next, if the call is disconnected from the destination terminal that is communicating during facsimile communication or from the line network 1019, the call is disconnected from the line network 1019 in step S511 in FIG. . That is, the DC loop generated by the line network (PSTN) 1019 is released, and when the release is detected by the line connection unit 1017, the call connection unit 1013 executes C / Si / f 1018 in the next step S512. The “call disconnection notification” status is output to the main unit 1001.

Then, in step S510 in FIG. 6, the line connection unit 1017 performs a call disconnection process on the line network 1019, that is, opens an electric switch or the like that has generated a DC loop together with the line network 1019.

Next, from the communication terminal 1000 to the line network 101
9, the call connection unit 1013 confirms that there is no incoming call from the line network 1019 in step S501 in FIG. 5, and in step S508, the C / Si
/ F1018 “call request” from main unit 1001
, The necessary information is identified, and in step S513 in FIG. 7, a call is made to the line network 1019. That is, a DC loop is generated together with the line network 1019 by closing an electric switch or the like, and a dial signal is transmitted to the line network 1019 using information necessary for making a call (ie, the number of the destination terminal).

In step S514 in FIG. 7, when line connection unit 1017 sends a dial signal to line network 1019, it recognizes that the call connection operation has been completed, and call connection unit 101
3 outputs a “call connection notification” status to the main unit 1001 by C / Si / f 1018.

As described above, according to communication terminal 1000 of the present embodiment, even if line network 1019 connected to communication terminal 1000 is different, no change is made.
The line connection unit 1017 can cope with the situation only by preparing a different call connection unit 1013. That is, the main body 1001
Without changing the function or configuration of the
Since the call connection units can be exchanged depending on the type of the line network to be connected using the versatile interface, inexpensive, compact, convenient communication with low redundancy when changing the type of the line network 1019 to be connected. A terminal can be realized. That is, it is possible to easily respond to diversified user needs.

(Other Embodiments) In another embodiment, a communication unit of the main body 1001 having a different communication function can be considered. In the above-described embodiment, the main body 10
Although the example in which G3 facsimile communication is performed as the function of the 01 side has been described above, the communication operation unit 1010 of FIG.
It is only necessary to add or replace the functions described above, and it is possible to connect a call connection unit compatible with ISDN or a call connection unit compatible with PSTN, and the communication terminal of the present invention can be easily realized.

In another embodiment, the main body 1
001 is digital data communication, and when a network to be connected and used is a digital network, when a higher-speed digital network is desired to be used, a call connection unit corresponding to the high-speed digital network is simply connected to the main unit. In addition, a communication terminal using the present invention can be easily realized.

[0104]

As described above in detail, according to the communication terminal of the first aspect of the present invention, it is possible to have a versatile interface between the main unit and the call connection unit, and the call connection is made possible. The unit can optimally distribute the processing load of the main unit and the call connection unit such that it has only the call connection function, and can perform optimal call connection processing efficiently. Therefore, by maintaining the same communication function in the main unit and configuring a plurality of call connection units according to various line networks, a plurality of communication terminals corresponding to different line networks can be realized. Thus, it is possible to realize a plurality of communication terminals having a low degree of redundancy, which suppresses a stoppage and meets a variety of needs.

According to the communication terminal of the second aspect of the present invention, the main unit has means for sending a request command for requesting the function operation of the call connection unit by the command status interface means. There is an effect that the status interface means can be used for general purpose.

According to the communication terminal of the third aspect of the present invention, the call connection unit transmits the detection result of the detection unit for detecting the state of the line network connected to the call connection unit to the command status interface unit. Therefore, the command status interface means can be used for a more general purpose.

According to the communication terminal of the fourth aspect of the present invention, when the call is connected by the call connection unit, the main unit controls the communication operation unit and the communication signal interface means to perform the communication operation. Therefore, the communication signal interface unit can be used for general purposes.

According to the communication terminal of the fifth aspect of the present invention, when the call connection unit receives the communication channel connection request from the main unit, the call connection unit connects the communication signal interface unit to the communication channel of the network. Therefore, there is an effect that the communication signal interface unit can be used more generally.

Further, according to the communication terminal of the sixth aspect of the present invention, a versatile interface can be provided while maintaining the communication operation section in the main body, that is, maintaining the same communication function in the main body. Utilizing, it is possible to exchange call connection units depending on the type of network to be connected, so that only by exchanging call connection sections, a plurality of communication terminals corresponding to different network can be realized, that is, By simply changing the call connection unit without changing the main unit, it is possible to realize a plurality of low-redundancy communication terminals that can suppress the startup corresponding to various needs of the user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of a communication terminal according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an operation sequence of the communication terminal according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a flow of an operation of a main unit in the communication terminal according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of an operation of a main unit in the communication terminal according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing an operation flow of a call connection unit in the communication terminal according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing an operation flow of a call connection unit in the communication terminal according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing an operation flow of a call connection unit in the communication terminal according to the first embodiment of the present invention.

FIG. 8 is a diagram showing an operation sequence of the communication terminal according to the second embodiment of the present invention.

FIG. 9 is a diagram showing an operation sequence of the communication terminal according to the third embodiment of the present invention.

FIG. 10 is a diagram showing an operation sequence of a communication terminal according to a fourth embodiment of the present invention.

FIG. 11 is a block diagram showing an internal configuration of a conventional communication terminal.

FIG. 12 is a block diagram showing an internal configuration of a conventional communication terminal different from FIG.

FIG. 13 is a block diagram showing an internal configuration of a conventional communication terminal different from FIGS. 11 and 12.

[Explanation of symbols]

1000 Communication terminal 1001 Main unit 1002 CPU (central processing unit) 1003 ROM (read only memory) 1004 SRAM (static random access memory) 1005 DRAM (dynamic random access memory) 1006 display unit 1007 operation unit 1008 reading unit 1009 recording Unit 1010 Communication operation unit 1011 C / Si / f (command / status interface) 1012 Communication signal i / f (communication signal interface) 1013 Call connection unit 1014 CPU (central processing unit) 1015 ROM (read only memory) 1016 SRAM (Static random access memory) 1017 Line connection unit 1018 C / Si / f (command status interface) 1019 lines

Claims (8)

[Claims] 1. A communication terminal comprising: a main unit having a communication operation unit which controls a whole apparatus and performs a communication operation; and a call connection unit which is connected to a line network and performs a call connection function. A communication terminal, comprising: command / status interface means for exchanging commands and status between the communication terminal and the call connection unit; and communication signal interface means for exchanging communication signals. 2. The communication terminal according to claim 1, wherein said main unit includes request command carrying means for sending a request command for requesting a function operation of said call connection unit by said command / status interface means. 3. The call connection unit includes: a detection unit that detects a state of a network connected to the call connection unit; and a notification unit that notifies the main unit of a detection result of the detection unit by the command / status interface unit. The communication terminal according to claim 1, comprising: 4. The communication device according to claim 1, wherein the main unit includes a communication control unit that performs a communication operation by controlling the communication operation unit and the communication signal interface unit when a call is connected by the call connection unit. The communication terminal according to claim 1, wherein: 5. The call connection unit according to claim 1, wherein said call connection unit has a connection unit for connecting said communication signal interface unit to a communication channel of a circuit network when receiving a communication channel connection request from said main unit. Communication terminal. 6. The communication terminal according to claim 1, wherein the call connection unit is a call connection unit, and has a switching unit that can exchange the call connection unit depending on a type of a communication line. 7. The communication terminal according to claim 1, wherein the communication terminal is a facsimile machine. 8. The facsimile apparatus according to claim 1, wherein the facsimile apparatus is an ISDN (I
integrated Services Digital
Network: Integrated Services Digital Network) Connection G
The communication terminal according to claim 7, wherein the communication terminal is a three-facsimile machine.