JP2573242B2 - Communication terminal device - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial application field) The present invention relates to an improvement of a communication terminal device used in, for example, ISDN.

(Prior Art) In recent years, various communication network systems have been developed with the progress of communication technology and diversification of communication modes. Among them, a digital integrated service network (ISDN) has been developed.
es digital network). This ISDN provides telephone, data, facsimile communication and various communication processing services in a single digital communication network. A communication system using this ISDN is configured as shown in FIG. 5, for example. That is, this system is a digital circuit switching network 1
Network, packet switching network 2, common line signaling network 3, etc.
It has a DN exchange 4 and a subscriber line 5 for this ISDN exchange 4.
And a communication terminal device 6 such as a telephone device, a facsimile device, and a voice mail device in the user's home. Then, a plurality of communication channels are time-division multiplexed for each subscriber line 5, and desired communication is performed between the communication terminal devices by selectively using these communication channels. For example, for a basic interface with a transmission speed of 192 kbit / s, 64k
Two B-bits per second and one D-channel at 16 kbits / second are time-division multiplexed, and data and the like are transmitted using these channels.

By the way, in this type of system, a home bus is provided between the home line terminating device 7 connected to each subscriber line 5 and the terminal device 6, so that in the case of a basic interface, up to eight communication terminals are used. The device 6 can be connected. Then, a sub-address as terminal identification information is set in each of these communication terminal devices 6, and when an incoming call occurs on the home bus, the sub-address sent from the calling side in each communication terminal device is replaced with the sub-address of its own device. When the two sub-addresses match with each other, only the communication terminal device performs the incoming call operation.
Therefore, the calling side inserts a desired subaddress into the call control message and sends it out, so that the calling side can communicate with a desired terminal among a plurality of communication terminals connected to one subscriber line 5. it can.

However, conventional communication terminal devices used in this type of system generally require the subscriber to manually enter the setting of the sub address when the device is turned on and store it in RAM or write it in ROM beforehand. It is done by. For this reason, the subscriber has to set the sub-address each time the apparatus is turned on, and it is difficult to change the sub-address. On the other hand, in order to solve these problems, it is conceivable to write the sub-address in the RAM with the power supply backup, but it is still the same to use the memory as in the case of using the above-mentioned RAM and ROM. Since a control sequence for inputting the sub-address must be prepared, there is a problem that the load on the control circuit is increased.

(Problems to be Solved by the Invention) As described above, in the conventional device, the sub-address is stored in the memory such as the RAM or the ROM, so that the operation of setting the sub-address is troublesome and the change of the sub-address is difficult. It cannot be easily performed, and furthermore, a control sequence for setting a sub-address is required, so that there is a problem that a load on a control circuit increases.
Focusing on this point, the present invention eliminates the need for a sub-address setting operation each time the power is turned on, and simplifies the setting operation by making it easy to change the sub-address. A communication terminal device capable of reducing a load on a circuit and further enabling a user to easily switch between a conditional call operation with a subaddress and an unconditional call operation without a subaddress as needed. It is assumed that.

[Structure of the Invention] (Means for Solving the Problems) As shown in FIG. 1, the present invention provides an identification information setting switch A capable of variably setting identification information and holding the set identification information. And information collating means B. The sub-address is set by the identification information setting switch A, and when an incoming call occurs, the identification information held by the identification information setting switch A is discriminated by the identification information collating means B. The identification information is read and collated with the identification information sent from the calling terminal, and an identification information valid switch is provided. When the identification information valid switch specifies that the collation of the identification information is valid, the identification information described above is used. Incoming call operation is performed after the collation of the ID information is performed, and the incoming call operation is performed unconditionally when it is specified that the collation of the identification information is invalid. A.

(Operation) As a result, even if the power is turned off, the sub-address can be securely retained and can be easily set by operating the switch, so that the setting operation of the sub-address can be simplified, and the control circuit can identify the identification information. Setting switch A
Since it is only necessary to read the identification information held in the sub-address, the control sequence for setting the sub-address becomes unnecessary, and the load on the control circuit can be reduced correspondingly.

Further, by providing an identification information valid switch separately from the identification information setting switch so that the user can specify whether or not the identification information is to be collated, it is of course possible to make a call only when the subaddress matches. In addition, it is possible to obtain an effect that all incoming calls can be received as needed.

Embodiment FIG. 2 shows a configuration of a communication terminal device according to an embodiment of the present invention. In this embodiment, the case where the basic interface of ISDN is applied will be described.

This device has a line interface 12 for separating a B channel for transmitting voice data multiplexed on a subscriber line 10 and a D channel for transmitting control information. The channel is introduced into the telephone circuit 13 and the D channel is introduced into the control circuit 15, respectively. The telephone circuit 13 has a digital-to-analog conversion unit, converts the voice signal input from the transmitter 14a of the handset 14 into digital voice data, outputs the digital voice data to the line interface 12, and is supplied from the line interface 12. The converted voice data is converted into an analog signal and output from the handset 14b of the handset 14.

On the other hand, the control circuit 15 includes, for example, a microcomputer as a main control unit, and outputs a ringing signal for an incoming call to the sounder 16, and outputs a contact signal of the hook contact 17, a key signal of the dial keypad 18, and a sub-address valid. The operation signal of the switch 19 and the set numerical information of the sub-address setting switch 20 are input. The sub-address valid switch 19 is for designating whether or not to perform sub-address collation. The sub-address setting switch 20 is composed of, for example, a multi-digit dial switch that can select and specify “0” to “9”.
Used to specify the sub address of the own device.

The control circuit 15 includes a sub-address collating unit 15c and a sub-address validity determining unit 15d, in addition to a calling / incoming call control unit 15a for performing call control and incoming call control for the network and a communication control unit 15b for performing various controls during communication. And The sub-address checking means 15c checks the incoming sub-address sent from the calling side at the time of the incoming call with the sub-address of the own apparatus set by the sub-address setting switch 20, and when the two addresses match, the calling and incoming call control means
15a is to perform incoming call control. The sub-address validity determining means 15d determines whether or not the sub-address is valid from an operation signal of the sub-address validity determining means 15d at the time of an incoming call. is there.

Next, the operation of the device configured as described above is controlled by a control circuit.
The description will be given according to the 15 control procedures. First, in the standby state, the subscriber operates the sub-address setting switch 20 to set the sub-address of the own device, and sets the sub-address valid switch 19 to either valid or invalid. still,
Since the setting by these switches does not require the control of the control circuit 15, the sub-address and its validity / invalidity can be set at any time in any state of the device.

On the other hand, in this standby state, the control circuit 15 monitors the outgoing call and the incoming call in steps 3a and 3b, respectively, as shown in FIG. When an incoming call occurs in this state, the control circuit 15 first proceeds to step 3c.
Inputs an operation signal of the sub-address valid switch 19, and determines from the operation signal whether or not the sub-address is valid in step 3d. If it is determined that the subaddress is valid, the process proceeds to step 3e, where the subaddress for specifying the called terminal sent from the calling terminal, that is, the called subaddress is detected. The reception sub-address is inserted into a control message sent by the D channel and transmitted. FIG. 4 shows an example of the structure of the control message. The control message is composed of a common part in which a call number and a message type are inserted, and an individual part in which other individual information is inserted. Inserted into the part.

When the control circuit 15 detects the destination sub address,
Move on to step 3f where the sub address setting switch
The sub-address of the own device set in step 20 is inputted, and this sub-address is collated with the received destination sub-address (step 3g). If the addresses match, the process proceeds to step 3h, where a ringing tone is generated from the sounder 16 to notify the subscriber that an incoming call has occurred.At step 3i, the subscriber waits for an off-hook, and the subscriber goes off-hook. For example, this is detected from the contact signal of the hook contact 17 and the control is shifted to the call control. On the other hand, if the sub-addresses do not match, the control circuit 15 determines that there is no incoming call to its own device, shifts to step 3j, performs a negative response process, and returns to the standby state.

If the sub-address valid switch 19 is set to invalid rather than valid, the control circuit 15 determines that collation of the sub-address is not necessary, and proceeds directly from step 3d to step 3h. A ringing tone is generated from step 16, and thereafter off-hook monitoring and call control in step 3i are executed.

As described above, according to the present embodiment, the sub-address is set by providing the sub-address setting switch 20 for mechanically retaining the sub-address, so that the sub-address once set is retained even if the power of the apparatus is turned off. As a result, the subscriber does not need to perform the setting operation of the sub-address every time the power is turned on. Further, a sub-address setting control sequence is not required at all, whereby the load on the control circuit is greatly reduced, and the sub-address can be easily changed if necessary. Further, according to the present embodiment, the sub-address valid switch 19 is provided, so that it is possible not only to make a call when the sub-address matches but also to make a call for all incoming calls as necessary. Thus, for example, it is possible to set the terminal device closest to the subscriber's location to receive an incoming call, which is very convenient.

The present invention is not limited to the above embodiment,
For example, the configuration of the sub-address setting switch, the type of the communication terminal device (may be a facsimile device or a voice mail device), the control procedure and control contents of the control circuit, and the like can be variously modified without departing from the gist of the present invention. .

[Effects of the Invention] As described in detail above, according to the present invention, an identification information setting switch that can variably set identification information and holds the set identification information, and an identification information collating unit are provided. The sub-address is set by the information setting switch, and when an incoming call occurs, the identification information matching means reads the identification information held in the identification information setting switch and checks the identification information sent from the calling terminal. By doing so, the sub-address setting operation is not required each time the power is turned on, and the sub-address can be easily changed. This simplifies the setting operation, and furthermore, the control sequence for setting the sub-address. And a communication terminal device capable of reducing the load on the control circuit by eliminating the need.

Further, according to the present invention, an identification information validating switch is provided in addition to the identification information setting switch, and when the identification information validating switch specifies that the collation of the identification information is valid, the identification information is collated. Incoming call operation is performed, while on the other hand, when it is specified that the collation of the identification information is invalid, the incoming call operation is performed unconditionally, so that only when the subaddress matches as desired by the user, It is possible to provide a communication terminal device capable of receiving a call as well as receiving an incoming call if necessary.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of a communication terminal device according to the present invention, and FIGS. 2 to 4 are diagrams for explaining a communication terminal device according to an embodiment of the present invention. FIG. FIG. 3 is a flowchart showing a control procedure and control contents of a control circuit, FIG. 4 is a schematic diagram showing a configuration of a control message, and FIG. 5 shows an example of a configuration of an ISDN communication system. FIG. A: identification information setting switch, B: identification information matching means, 10: subscriber line, 12: line interface,
13 telephone circuit, 14 handset, 14a transmitter, 14b receiver, 15 control circuit, 15a call control means, 15b communication control means, 15c sub address collation means .., 15d... Sub-address validity determination means, 16... Sounder, 17... Hook contact, 18... Dial keypad, 19.

Continued on the front page (72) Inventor Takahiro Endo 3-1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (72) Inventor Takashi Saeki 3-1-1 Asahigaoka, Hino-shi, Tokyo 1 Inside the factory (56) References JP-A-63-245046 (JP, A) JP-A-62-6595 (JP, A)

Claims (1)

(57) [Claims] 1. A communication terminal device used in a communication system capable of transmitting identification information of a called terminal from a calling terminal to a called terminal at the time of a call. An identification information validating switch for designating and inputting the identification information; an identification information setting switch capable of variably setting the identification information and retaining the set identification information; and collating identification information from the designation input of the identification information validating switch. Determining means for determining whether the information is valid or invalid; at the time of the incoming call, when the collation of the identification information is determined to be invalid by the determining means, the call operation is performed unconditionally; If it is determined that the collation is valid, the identification information held in the identification information setting switch is read and collated with the identification information sent from the calling terminal, and both identification information are read. Means for performing an incoming call operation only when the information matches.