JPH02248149A - Communication network terminator having incoming call terminal identification function - Google Patents

Abstract

PURPOSE:To give an incoming call to a corresponding communication terminal equipment by allowing a communication network terminator to discriminate a kind of a caller communication terminal equipment from an incoming call from the communication terminal equipment connecting to an external electric communication line. CONSTITUTION:An incoming call detection circuit 62a of an incoming call detection section 62 detects an incoming call signal from an electric communication line 2 and sends the signal to a CPU 61a of a main control section 61, then the CPU 61a closes a channel closing circuit 66a of an incoming call terminal identification control section 66 and the terminal equipment is communicated with the communication terminal equipment of an external communication network 3. A sent incoming call terminal identification signal is detected in this state. The incoming call terminal identification signal represents the type of the communication terminal equipment and the type is detected by a tone detection circuit 66b. Moreover, when the caller terminal equipment is a communication terminal equipment not sending the signal of a specific frequency, one of PB dial signals defining the type of the communication terminal equipment in advance is sent from the communication terminal equipment. This is received by a PB demodulation circuit 66c of the communication terminator 6 and analyzed and identified by the CPU 61a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to small-scale information communication systems such as those used in homes, and in particular, to accommodate a plurality of communication terminals connected at multiple points to a signal transmission path within a home. In a communication system in which each communication terminal communicates via a common telecommunications line, it has a function to identify which communication terminal in the host system an incoming call from an external telecommunications line is directed to. It relates to communication network termination equipment.

BACKGROUND OF THE INVENTION FIG. 6 shows an example of the configuration of a conventional communication network termination device accommodating a public telephone line. In FIG. 6, reference numeral 1 indicates a signal transmission path, including a control signal channel 1a which is a signal transmission path for control signals in the system, and a telecommunications line 2 of an external communication network 3.
The information signal channel 1b is a signal transmission path for information communication between an external communication terminal connected via the system and a communication terminal connected at multiple points to the signal transmission path 1 in the system. Reference numeral 5 denotes a communication network terminal device, which is connected to an external communication network 3 via the telecommunications line 2.

When the incoming call detection circuit 52a of the incoming call detection unit 52 detects an incoming signal (16Hz intermittent signal) from the telecommunication line 2 and sends it to the CPU 51a of the main control unit 51, the CPU 51a receives a control signal by the transmission/reception circuit 55a of the communication control unit 55. A control command is sent to the communication terminal via channel 1a. 54 is a line switching unit having a switching circuit 54a, which connects the information signal channel 1b and the telecommunication line 2 in response to an incoming call response from the communication terminal that has received the notification, and connects the communication terminal connected to the signal transmission line 1. An information transmission path between communication terminals of the external communication network 3 is established. Reference numeral 53 denotes a calling control unit, which includes a dialing circuit 53b for sending a selection signal (dial signal) to the external communication network 3, and a line polarity detection circuit 53a for detecting a response from the other party.

Problems to be Solved by the Invention In the conventional communication network terminating device having the above configuration, when a plurality of communication terminals capable of receiving calls are connected to a signal transmission path, when an incoming call is received from a telecommunications line, the Since it is not possible to determine which communication terminal in the system the incoming call should be given to, the communication network terminal equipment uses a -broadcast command to notify the incoming call and receives the response from the communication terminal that responded first. The method was to accept the call and give the incoming call.

In this case, for example, a fax machine connected to the same system that is in automatic call receiving mode may answer an incoming call from an external telephone while you are away. Failures such as mismatched connections may occur.

The present invention has been made in view of the above problems, and is an incoming call that can give an incoming call from a communication device of an external communication network to an appropriate communication terminal within the system in a small-scale communication system using multipoint connections. The purpose of the present invention is to provide a communication network terminal device having a terminal identification function.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a communication path closing method for closing a communication path of a telecommunications line in response to an incoming call detected by an incoming call detection unit in a communication network terminal device. Function 9 Communication channel closing circuit Tone detection function that detects tone signals sent from the calling side communication device via the air line or incoming calls using PB double signals sent from the other party's communication device via the external communication network The configuration includes a receiving terminal identification control unit having a PB signal demodulation function that detects a terminal identification signal, and a communication path closing circuit temporarily responds to an incoming call from an external communication terminal. The incoming call is sent to the corresponding communication terminal in the system by detecting a signal of a specific frequency or a defined incoming terminal identification signal sent from the terminal using a 1-tone detection circuit or a PB demodulation circuit. There is.

Effect of the present invention By using the above-mentioned means, in a system in which a plurality of communication terminals capable of receiving calls are connected to a signal transmission path, in response to an incoming call from a telecommunications line, a predefined message sent from a calling terminal is transmitted. The communication network terminal device detects the identification signal and identifies and determines the type of communication terminal to receive the call.
According to the result, it becomes possible to give an incoming call to a communication terminal of the same type as the originating terminal in the system, and it is possible to prevent a discrepancy between the originating terminal and the terminal that responded to the incoming call.

Embodiment FIG. 1 shows a configuration diagram of an embodiment of a communication network terminating device having an incoming terminal identification function according to the present invention.

In FIG. 1, 1 is a signal transmission path, and a control signal channel 1a is a signal transmission path for control signals in the system.
and an information signal that is a signal transmission path for information communication between an external communication terminal connected via the telecommunications line 2 of the external communication network 3 and a communication terminal multi-point connected to the signal transmission path 1 in the system. It consists of channel 1b. Reference numeral 6 denotes a communication network terminal device having a function of identifying a called terminal according to the present invention, and is connected to an external communication network 3 via a telecommunications line 2. When the incoming call detection circuit Ei2a of the incoming call detection unit 62 detects an incoming call signal (16Hz intermittent signal) from the telecommunication line 2 and sends it to the CPU 61a of the main control unit 61, the CPU 6
1a is a communication path closing circuit Ei6 of the receiving terminal identification control unit 66;
a is closed, and the state is in communication with the calling terminal of the external communication network 3. In this state, the receiving terminal identification signal sent from the calling terminal is detected. The called terminal identification signal indicates the type of communication terminal with which the calling terminal can communicate, and if the called terminal identification signal detected by the tone detection circuit Ef8b is a tone signal with a frequency of 1100 Hz, an incoming call is given. The communication device in the target system is a G3 fax, and if the 1800 Hz carrier signal is a 1800 Hz carrier signal, the main control unit 61 determines that it is a Japanese teletex and PC communication terminal compliant with CCITT Recommendation V, 27ter.

In addition, if the originating terminal is a communication terminal such as a telephone that does not transmit signals of a specific frequency, one of the PB dial signals 0 to 9, which has previously defined the type of communication terminal, is sent from the originating terminal. This is received by the PB demodulation circuit 66C of the communication network terminal device 6, and analyzed and identified by the CPU 61a.

In addition, in order to notify the calling communication terminal of the external communication network of the system status (for example, calling, no response, no terminal, etc.), the control codes of A, B, and C of the PB dial signal are transmitted by the PB transmission circuit 66d. send. Furthermore, even if the other party's communication terminal is a voice communication terminal such as a telephone, in order to correctly inform the calling side communication terminal of the system status, the voice synthesis circuit 66e converts the content corresponding to the control code of the PB dial signal into voice. Send by. A line switching unit 6 includes a transmission control unit 63 consisting of a line polarity detection circuit f33a and a dial transmission circuit 63b, and a switching circuit 64a.
Reference numeral 4 has the same functions as the transmission control section 53 and line switching section 54 shown in the conventional example of FIG. 6, so a description thereof will be omitted. The incoming terminal identification signal detected by the incoming terminal identification control unit 66 is sent to the CPU.
After the incoming call notification command is analyzed by the communication terminal 61a, the transmission/reception circuit 85a of the communication control unit 65 sends the incoming call notification command to which the identification number of the corresponding communication terminal in the system is attached to the communication terminal.

In response to the incoming call response from the communication terminal, information signal channel 1
b and the telecommunication line 2 are exchanged by the exchange circuit 64a of the control unit 64.
, and establishes an information transmission path between the communication terminal that responded to the incoming call within the system and the originating communication terminal of the external communication network 3.

FIG. 2 shows an example of a called terminal identification signal that is identified by a communication network terminal device having a called terminal identification function according to the present invention, and a terminal corresponding to each identification signal. The PB dial signal includes 'JUST-P', which can be identified by C8T and CNG, respectively.
It is also possible to reassign the C personal computer communication terminal and the G3 fax. FIG. 3 shows the sequence of incoming calls from a telephone on an external public telephone line to the HBS using the communication network termination device having the incoming terminal identification function of the present invention.
Give an example.

In Figure 3, the telephone on the calling side is a communication network terminal equipment (N
PB dial signal "2" is sent to T) (specifying telephone number 3). The communication network terminal device sends back a PB double signal "2" to the originating telephone, informing it that it has received the terminal identification signal, and transmits the telephone number on the HBS control signal channel.

Sends a command indicating that 3 is designated as an incoming call. After the telephone N003 that received the command performs the HBS information signal channel connection procedure between the home bus controller (WBC) and the NT, the incoming call that had been held at the NT until then is transferred to the telephone No.

3, and you can make a call.

Figure 4 also shows that in the same call reception sequence, the communication terminal
PC communication terminal (J
UST-PC).

In Figure 4, when the NT closes the communication path and temporarily responds to the incoming call, the personal computer communication terminal (PC terminal) on the calling side
1800H2 carrier signal (C8T) is sent. The NT detects this and routes the incoming call to the PC terminal using the same procedure as the telephone of FIG.

FIG. 5 shows an example in which the communication terminal is a 03 fax in the same incoming call sequence. Similarly, in this case,
In NT, 1 100H sent from the originating fax machine
z) - detect the green signal (CNG).

Effects of the Invention According to the communication network terminal device having a called terminal identification function according to the present invention: A personal computer communication terminal (JUST-PC) that complies with CCITT Recommendation V, 27ter.

When communicating by connecting a G3 fax and other communication terminals such as telephones to the same HBS, the type of communication terminal on the calling side is determined when a call is received from a communication terminal connected to an external public telephone line. By determining this at the communication network terminal device, it becomes possible to use the result to provide an incoming call to the corresponding communication terminal within the system.

Furthermore, even when the originating terminal is a communication terminal such as a telephone that does not transmit signals of a specific frequency, and a plurality of communication terminals of the same type are connected to the system, the PB signal of the communication network termination device of the present invention By using the demodulation function to receive a terminating terminal identification signal in the form of a PB multiplied signal sent from a calling terminal, it becomes possible to give a terminating call to a specific communication terminal.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a communication network terminating device having a terminating terminal identification function of the present invention, and FIG. 2 shows an incoming call that is identified by a communication network terminating device having a terminating terminal identification function of the present invention Correspondence diagram between terminal identification signals and terminals corresponding to each identification signal, Part 3
The figure shows an example of an incoming call sequence from a telephone on an external public telephone line to an HBS using the communication network termination device having the incoming terminal identification function of the present invention. Figure 5 is a diagram showing the incoming call sequence when the communication terminal on the calling side is a 03 fax, and Figure 6 is a diagram showing the incoming call sequence when the communication terminal on the calling side is a 03 fax. FIG. 2 is a configuration diagram of a communication network terminal device accommodating a public telephone line. 1... Signal transmission line, 2... Telecommunication line, 3...
External communication network, 6... Communication network termination device, 66... Incoming terminal identification control unit, 66a... Communication path closing circuit, 66b
...Tone detection circuit, 66C...PB demodulation circuit, 6
6d...PB transmission circuit, 66e...Speech synthesis circuit.

Claims (3)

[Claims] (1) A signal transmission path connected to an external communication network via one or more telecommunications lines and having a control signal channel and one or more information signal channels, and a signal transmission path connected to the signal transmission path at multiple points. In a small-scale communication system accommodating a plurality of communication terminals that perform information communication via a connected common telecommunications line, a line switching unit that performs line switching between the information signal channel and the telecommunications line; a call control unit that makes a call to an external communication network; an incoming call detection unit that detects an incoming call from the external communication network; and a communication unit that closes a communication path of a telecommunications line in response to an incoming call detected by the incoming call detection unit. a called terminal identification control section having a tone detection function for detecting a tone signal sent from the communication device on the calling side via the electrical line after the communication path is closed; and control via the control signal channel. A communication control unit that sends and receives commands, and a main control unit that controls the line switching unit, the origination control unit, the incoming call detection unit, the incoming terminal identification control unit, and the communication control unit, and In response to an incoming call from a communication terminal, the communication channel closing function of the incoming terminal identification control unit temporarily responds to the incoming call, and uses a predefined incoming terminal identification signal sent from the originating communication terminal to identify the incoming call depending on the type of the signal. It is detected by the tone detection function of the incoming terminal identification control unit, and the main control unit notifies the corresponding communication terminal in the system by a command via the control signal channel, and the communication path closing function temporarily 1. A communication network terminal device having a called terminal identification function, which is characterized in that a call that has received an incoming call response is given to the corresponding communication terminal according to a predetermined procedure. (2) The incoming terminal identification control unit has a PB signal demodulation function that detects the incoming terminal identification signal based on the PB signal sent from the other party's communication device via the external communication network, and A predetermined procedure for notifying the communication terminal in the system corresponding to the PB signal number that there has been an incoming call via a control signal channel, and temporarily responding to the incoming call using the communication path closing function. Claim 1 is characterized in that it is given to the corresponding communication terminal by
A communication network terminal device having a called terminal identification function as described in Section 1. (3) Claim 1, characterized in that the receiving terminal identification control unit has a voice synthesis function that sends a voice synthesized message to the other party's communication device via a telecommunications line.
A communication network terminal device having a called terminal identification function according to item 1 or 2.