JPH04176249A - Isdn composite terminal equipment - Google Patents

Abstract

PURPOSE:To allow the operator to easily grasp it that a user network interface is busy by annunciating it from an external speaker that the user network interface is busy. CONSTITUTION:A tone generating circuit 7 is provided and the tone is sounded from an external ancillary speaker 8, and when the ISDN line is busy by other data transmission function than a digital telephone set section 2 and the operator hooks off a handset, a tone representing a busy line is generated by the tone generating circuit 7 and the tone is sounded from the external speaker 8. Thus, the user easily grasps it that the user network interface is busy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ISDN composite terminal device, and more particularly to an ISDN composite terminal device having the function of a digital telephone as a composite terminal.

[Conventional technology]

ISDN (Integrated Digital Services Network) as a digital line network is expected to provide various information and communication services based on various media such as voice, image data, and other communication data.

Such an integrated service network connects multiple ISs to one subscriber line.
DN terminals can be connected and used, and moreover, the user can operate a plurality of these terminals at the same time.

For example, the basic user interface of an ISDN line can connect up to eight terminals, such as digital telephones or data communication terminals, to two B channels and one D channel. According to the B channel 6 4
If the information transfer function of all Kbps is divided and used, it is also possible to transmit data using eight such individual terminals at the same time.

That is, in ISDN, 1-to-n wiring (lotus wiring) is specified as one of the wiring forms in the basic interface, and the ISDN basic interface (64Kbps
With the interface consisting of 2B (information channel) + 16Kbps ID (signal channel), up to 8 terminals can be connected to one line, and if you use the communication channel B channel with the above-mentioned transfer capacity, 2 of them can be connected.
Both tables can be used at the same time.

Typical examples of ISDN terminals include digital telephones as described in "2. There are also compound terminals, and such compound terminal devices can also have up to eight data transmission functions and can be connected to one basic user interface.

[Problem that the invention is trying to solve]

However, if one attempts to configure each of the ISDN composite terminal devices with one data transmission function to the maximum function (64, Kbps) of the B channel, only two of the multiple data transmission functions will operate simultaneously. Can not. Therefore, if the operator of the terminal does not have any means to easily know whether the user interface to which the terminal is connected is in use, it will be inconvenient and impractical for the operator to use.

Conventionally, ISDN composite terminal devices do not have a means for allowing an operator to easily know that the user/wireless interface is in use.

An object of the present invention is to provide an improved TSDN composite terminal device that can eliminate the inconvenience of "double connection."

[Means and effects for solving the problems] The present invention provides an ISD which has a combination of a digital telephone and a data transmission function other than the digital telephone and is connected to an ISDN line.
N compound terminal, and if the digital telephone cannot be used due to the use of the ISDN line by a data transmission function other than a digital telephone, a person who picks up the handset of the digital telephone can connect the terminal. This makes it easy to recognize that the user interface is in use.

Further, the present invention provides an ISD with three or more data transmission functions.
An ISDN composite terminal connected to N line, which has two data transmission functions, and when the line is occupied, when the start switch of another data transmission function is pressed, the terminal connects. This makes it easy to recognize that the user/rope interface is in use.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of an ISDN composite terminal according to an embodiment of the present invention.

In the same figure, in the device of this embodiment, the operator
An operation panel section 1 for performing predetermined input operations to operate the N terminal device, a digital telephone section 2 having a digital telephone function, and a data transmission section having a data transmission function other than the digital telephone, 2 in the illustrated example. It has one data transmission section (I) 3° (■) 4, an ISDN line interface circuit 5, a main control section 6, a tone generation circuit 7, and an external speaker 8.

The data transmission unit (D, (n), 3.4. has functions such as a facsimile or a personal computer, and is connected to the B channel (64, K b p
It is a data transmission unit that transmits and receives data as necessary using the digital telephone unit 2.
It is connected to the SDN line interface circuit 5. The IS
The DN line interface circuit 5 connects these digital telephone section 2 and data transmission section (I) 3. Data transmission section (II)
An interface circuit that can simultaneously connect up to two of the three of 4 to an ISDN line for communication, and is
Connected to N line.

In this way, this embodiment is a composite terminal device that is connected to an ISDN line and has a total of three functions: a digital telephone and a data terminal. Interface circuit 5, digital telephone section 2, data transmission section (I) 3, and data transmission section (■
) 4 are connected to each other via a control bus and a data bus, and the operation panel section 1 is also connected to the main control section 6 via these buses. ”2 The main control unit 6 is a CPU
RO that stores programs for controlling terminal devices
It consists of RA, M, etc. prepared as a work area in order to execute the program stored in M and ROM.
The main control unit 6 controls the entire device by the CPU based on a program stored in the ROM.

The digital telephone section 2 includes a handset communication circuit system, a hook switch, and other necessary means, the details of which will be described later.

Communication is carried out under the control of the main control unit 6 through the interface circuit 5, digital telephone unit 2, data transmission unit (1) 3,
This is done through the data transmission section (■) 4. For example, in the case of telephone communication, after two terminals are connected via a cable, in reception, the telephone section 2 is connected via the interface circuit 5.
Furthermore, when transmitting from the own terminal, the voice information signal converted in the telephone section 2 is sent to the ISDN network through the interface circuit 5.

In the ISDN composite terminal device having the functions of a digital telephone and a data terminal as described above, this embodiment further includes a tone generation circuit 7 and is configured to transmit the tone from an attached external speaker 8. When the operator takes the handset off-hook while the ISDN line is in use using the data transmission function described above other than the digital telephone section 2, the tone generation circuit 7 generates a tone indicating that the line is in use, and It is configured to be transmitted from the speaker 8.

FIG. 2 shows an example of the configuration of the digital telephone section 2 in FIG. 1 for this purpose. In the drawing, digital telephone part 2
Handset 2J Hook switch 221 Call circuit 23. and a codec 24 that converts an analog signal into a digital signal (PCM code) or converts a digital signal from the interface circuit 5 into an analog signal. A tone generating circuit 7 for generating a predetermined tone necessary to indicate that the line is in use is connected to the control section 6, and the main control section 6 is also connected to the hook switch 22.

The main control unit 6 detects information on the closed state (off-hook) and open state (on-footer) of the hook switch 22, and if the line is unavailable, the main control unit 6 outputs a signal to the tone generation circuit 7. , the tone generation circuit 7 generates a predetermined tone and outputs it from the external speaker 8.

Next, the configuration of the tone generation circuit 7 is shown in FIG. As shown in FIG. 3, the tone generation circuit 7 includes a clock generation circuit 71, a frequency divider 72 that appropriately divides the frequency of the clock generated by the clock generation circuit 71, and outputs the clock signal output from the frequency divider 72. It consists of a signal level conversion circuit 73 that converts the signal level to a level suitable for input to the telephone communication circuit 23 shown in FIG. 2, and the frequency divider 72 is connected to the main control section 6 for control.

The control section 6 uses the hook switch 22 to detect off-hook and on-footer, and also to switch the digital telephone section 2 to T.
As a result of determining whether connection to the SDN line is possible, if connection is not possible, the frequency divider 72 is set to output a tone signal from the tone generation circuit 7, and the external speaker 8 is controlled to output a tone.

Therefore, the main control section 6 has a program storage section, and the program storage section stores programs related to communication with the digital telephone section 2. An example of this is shown in flowchart 1 in FIG.

As shown in the flowchart of FIG. 4, when the handset 21 of the digital telephone section 2 goes off-hook in a state where the user/wire interface is used by a data transmission function other than the digital telephone section 2 and the digital telephone section 2 cannot be used. A tone indicating that the line is unusable can be sent from the external speaker 7 to make the operator aware that the line is unusable.

FIG. 4 will be specifically explained below.

FIG. 4 is a flowchart illustrating the processing operation of the main control unit 6 in this embodiment regarding sending out a predetermined tone to notify the operator that the line is unusable when the line is unusable.

It is now assumed that the ISDN composite terminal device of this embodiment is in a standby state with its digital telephone unit 2. Moreover, at this time, the handset 21 is off-hook, and the above-mentioned data transmission section (I) 3. It is assumed that both data transmission units (■) 4 are not necessarily operating.

Now, in FIG. 4, first, in step 401, the hook switch 22 is always monitored when the digital telephone unit 2 is in a standby state, and when the handset 21 is taken off and off-hook, that is, in step 401 If the answer is Yes, the hook switch 22 is turned on as described above.
is in a closed state, so at this time the main control unit 6
Check if you can connect to the ISDN line. Specifically, when the data transmission unit (1) 3 and the data transmission unit (■) 4 are connected to the ISDN line via the interface circuit 5, the result of the determination in step 4.02 is NO. Therefore, the process advances to step 403.

In step 403, an appropriate tone is sent to the external speaker 8 in order to notify the operator that the digital telephone section 2 is unavailable.

For example, when selecting the tone as the busy tone currently provided by the public telephone network (4-00 Hz, ○N10FF repeated for 0.5 seconds), the main control unit 6 outputs a busy tone signal from the tone generation circuit 7. The frequency divider 72 is set so that The tone signal output by the tone generation circuit 7 is sent out as a tone by an external speaker.

In this way, according to the second structure, a digital telephone,
It has multiple data transmission functions such as facsimile, and IS
The composite terminal device connected to the DN line is configured to have a function of generating a tone and transmitting the tone to an attached external speaker 8, and the user interface is used by a data transmission function other than a digital telephone, and the digital telephone is Unavailable state indicates that the line is unavailable when the handset 21 is taken off-hook.
- can be transmitted from the external speaker 8, and the usage status of the terminal can be easily determined.

Next, after the above processing, the operator will put down the handset 21 after knowing this, so step 40
In step 4, we will judge it. That is, when the answer is YES and the handset 21 is put down, the hook switch 22 becomes open due to on-hook, and at that point, the tone generation circuit 7 is controlled to stop sending out the tone from the external speaker 8 (step 405). Then, the process proceeds to step 406, where the digital telephone section 2 is placed in a standby state.

In contrast to the above, if the line is available when the hunt cellar 1-21 goes off-hook, it is possible to make a call as usual.

That is, in the case where step 401 proceeds to step 402, if the answer is YES, and therefore the digital telephone section 2 can be connected to the ISDN line, that is.

If even one of the two B channels is unused, the process proceeds to step 407, where the digital telephone unit 2 is put into a talking state based on operations such as dialing from the operation panel unit 1, and step 408
and wait to see if the hook switch is turned on-hook. When the phone is on-hook (S408 YES), the process advances to S406, where the digital telephone section is placed in a standby state, and the process returns to S401.

A second embodiment of the present invention will be described with reference to the drawings.

In the first embodiment, a predetermined tone is sent out from an external microphone, but in the second embodiment, a tone generation circuit is installed in the digital telephone section, and the tone signal from the codec and the tone signal from the tone generation circuit are transmitted. By adding switching circuitry for selective control, a predetermined tone indicating line busy can be emitted from the receiver of the handset as well as the external speaker. This configuration diagram is shown in FIG. The difference from FIG. 1 is that in FIG. 1, the tone generation circuit was provided separately, but the tone generation circuit is now included in the digital telephone section 2.

The detailed configuration of the digital telephone section 2 is shown in FIG.

FIG. 6 shows an example of the configuration of the digital telephone section 2 in FIG.
is Huntset 1-21. It includes a hook switch 225, a communication circuit 23, and a codec 24 that converts an analog signal into a digital signal (PCM coat) or converts a digital signal from the interface circuit 5 into an analog signal. Further, a tone generation circuit 24 generates a predetermined tone necessary to indicate that the line is in use, and furthermore, a tone signal from the tone generation circuit 24 and an audio analog signal from the codec 25 are selectively switched. , and has a switching circuit 26 that sends out signals to a communication circuit 23. The tone generating circuit 24 is connected to the main control section 6, and the hook switch is also connected to the main control section 6, and the hook switch 22 is in a closed state (off-hook) and an open state (
on-hook) is given to the main control unit 6 as information,
If the line is unavailable, the main control section 6 sends a signal to the tone generation circuit 2/l, and the tone generation circuit 24 outputs a predetermined tone from an external speaker. The tone generating circuit 2/l has the same configuration as the first embodiment (FIG. 3). By configuring the tone generation circuit 24 in the digital telephone unit 2 and providing a switching circuit in this way, it is possible to generate a predetermined tone while the line is in use, not only from the external speaker 8 (and from the receiver 2 of the handset). will be able to send out.

A third embodiment of the present invention will be described with reference to the drawings.

In FIG. 7, a scoot switch 21 is pressed when the data transmission unit attempts to establish a line in the configuration of the first embodiment.
．． Start switch 31. Star 1 to switch 41 are added to detect whether the start switch of each data transmission section is pressed, and when the line is unavailable, the tone signal from the tone generation section 7 is output from the external speaker 8 as in the first embodiment. By sending out a busy tone from the speaker 8, it is possible to notify the user that the pressed data transmission section is unusable. Regarding control, the same control as in the first embodiment is performed, except that a plurality of switches are detected.

Furthermore, by storing a program in the ROM that allows the frequency or time interval of the busy tone to be set for each terminal, it is possible to transmit busy tones with different sounds from each data transmission section. With this configuration, the same effects as in the first embodiment can be obtained not only in the digital telephone section but also in other data transmission sections.

A fourth embodiment of the present invention will be described with reference to the drawings.

FIG. 8 shows the configuration of the fourth embodiment. The operation panel section 1 includes a data transmission section (I) 2. (II)
3゜(■)4 Switch and start. A start switch 1a and a mode switch 1b are attached.

Also, it is connected to the ①SDN line through the TSDN line interface 6. Other components include a tone generation circuit 7 that generates tones, an external speaker 8 that outputs busy tones, and a control section 5 that controls them.

Details of the operation panel section 1 are shown in FIG.

In Figure 9, mode switch 1 for switching modes
5. Data transmission section ('I) 2. (n) 3.
(m) L E indicating which of 4 is selected
D a , ], 2 , T-E D l:l.

13. It is composed of LEDc, 1.4, and a star 1 to switch 11 that starts the selected data transmission section, and selection is made using only one start switch 11 and mode switch 15, without using multiple start switches. . Regarding control, the same control as in the third embodiment is performed.

As described above, this embodiment has a combination of digital telephone and non-digital telephone data transmission functions, and has an ISDN
It is an ISDN composite terminal device connected to the line, and the terminal uses the above-mentioned I/O device with a data transmission function other than a digital telephone.
When the handset of the digital telephone goes off-hook when the digital telephone cannot be used due to the use of an SDN line, the handset of the digital telephone has a function to notify that the line is in use. This makes it possible for the person holding the terminal to grasp and recognize that the user interface to which the terminal is connected is in use, improving usability. When the multifunction terminal device connected to the ISDN line is equipped with a function that generates a tone and sends the tone to an external speaker, the usage status of the terminal can be more easily determined, and when the handset is off-hook,
By sending the sound quickly, it is possible to know whether the device is usable or not, and there are effects such as eliminating the need for unnecessary dial links, etc.

Further, according to this embodiment, it is an ISDN composite terminal device that has three or more data transmission functions in combination and is connected to an ISDN line, and the terminal has a data transmission function.

When one of the start switches of ■ and ■ is pressed, if the line is not available, it has a function to send out a predetermined tone from an external speaker to notify that the line is in use. Therefore, the usage status of the ISDN line can be more easily determined, and unnecessary dialing etc. can be avoided. Also, in this example, 3
Although we have described a composite terminal device having up to three data transmission functions, it is of course possible to realize a multifunction terminal device having three or more data transmission functions.

〔Effect of the invention〕

As explained above, according to the present invention, since the external speaker notifies that the user interface is in use, the operator can easily know that the user interface is in use.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a composite terminal device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of the digital telephone section in FIG. 1, and FIG. FIG. 4 is a flowchart of the processing operation in the device of the first embodiment; FIG. 5 is a block diagram showing the configuration of the compound terminal device according to the second embodiment; The figure shows an example of the configuration of the digital telephone section in FIG. 5, FIG. 7 shows an example of the configuration of the digital telephone section according to the third embodiment, and FIG. 8 shows the fourth embodiment. FIG. 9 is a block diagram showing a configuration of a composite terminal device according to an example device. FIG. 9 is a diagram showing an example of the configuration of an operation panel section according to a fourth example device. ■...Operation panel section 2...Digital telephone section 3...Data transmission section (I) 4...Data transmission section (1) 5...ISDN line interface 6...Main control section 8... - External speaker 31... Start switch (I) 41... Start switch (II) 22... Hook switch 24... Tone generation circuit 241... Clock generation circuit 242... Frequency divider 243... Signal level conversion circuit

Claims (1)

[Claims] (1) In an ISDN composite terminal device that has a combination of a digital telephone and a data transmission function other than the digital telephone and is connected to an ISDN line, a means for detecting a hook switch, a means for generating a tone, and a digital telephone When the detecting means detects that the handset of the digital telephone is off-hook while the ISDN line is being used by a data transmission function other than the above, a predetermined tone generated by the generating means and indicating that the line is in use is transmitted from an external speaker. An ISDN composite terminal device characterized by having means for. (2) An ISDN composite terminal device having a combination of three or more data transmission functions and connected to an ISDN line, comprising a first means for detecting each start switch, and a second means for generating a tone.
and a third means for controlling the first means and the second means.
When the start switch of another data transmission function is pressed while the ISDN line is being used by two data transmission functions, the third means outputs a predetermined tone indicating that the line is in use to an external speaker. An ISDN composite terminal device characterized by transmitting data from.