JPH02268059A - Terminal adaptor - Google Patents

Abstract

PURPOSE:To attain communication with an external communication terminal equipment through the use of a signal transmission line of the system by using a terminal adaptor provided with a terminal feeding section, a tone generating section, a terminal state detection control section, a communication control section and a line exchange section. CONSTITUTION:The same electric condition and signal condition is given to a terminal feeding section 27 when a communication terminal equipment connects directly to a communication line not through an adaptor 2. When an incoming from an external equipment 6 is detected by a communication network terminator 4 and informed to a communication control section 22 of the adaptor 2, a tone generating section 25 generates a tone by a tone signal generating circuit 25b when a terminal equipment 3 is able to be sent to an external terminal equipment and generates a call signal at a call signal generating circuit 25a of the internal communication terminal equipment 3. A terminal state detection section 24 detects the closing/opening of a channel with a current of the terminal feeding section 27. A communication control section 22 applies command communication between a communication network terminator 4 and a main set 5 via a transmission/reception circuit 22a. A line exchange section 23 receives power from the feeding section 27 even when the communication terminal equipment 3 cannot receive power (opening of line exchange section 23) from the external communication network 8. The information is communicated even at a terminal equipment without any communication set specific to the system by the adaptor.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a small-scale information communication system in which internal communication terminals are connected to a signal transmission line in a home at multiple points. This invention relates to a terminal adapter for using a non-functional communication terminal as an internal communication terminal in this system.

BACKGROUND ART FIG. 5 shows an example of the configuration of a conventional internal communication terminal connected to a small-scale communication system accommodating a public telephone line. l is a signal transmission path, and is a signal transmission path for control signals in the system. A certain control channel 1a and external communication #18 telecommunications episode! It consists of an information channel tb which is a signal transmission path for information communication between an external communication terminal 6 connected via I7 and an internal communication terminal 3 connected at multiple points to a signal transmission path 1 in the system. Reference numeral 9 denotes a telephone terminal among conventional internal communication terminals dedicated to the system, and is composed of a system interface block 91 that performs communication functions unique to the system, and a communication terminal block 92 that has functions unique to internal communication terminals.

The system interface block 91 is a transmitting/receiving circuit 91
A communication control unit 912 having a communication network terminal device 4.2a is connected to the system via a control channel la of a signal transmission path l. Performs leap command communication with the main device 5,
Acquire the right to use information channel 1b necessary for information communication,
A main control unit 91 with a CPU 911 that performs processing for connecting the information channel acquired by the switching circuit 913a of the line switching unit 913 to the communication terminal block 92 controls the communication control unit 912 and the line switching unit 913, and also controls the communication Information regarding outgoing and incoming calls is exchanged with the communication terminal CPU 92 of the terminal block 92. The communication terminal block is composed of unique functions for communicating (calling) with the external communication terminal 6, including a hook switch 922 that configures a communication path, and a dial sending circuit 923 that sends out a selection signal when making a call. , a ringing tone generation circuit 924 that generates a ringing tone when a call arrives, a telephone circuit 926 that amplifies the voice of a telephone call, etc., and a microphone 928 for transmitting and receiving calls. Speaker 927. and these #
It is composed of an inter-terminal CPU 921 that performs I control.

Problems to be Solved by the Invention General communication terminals used in telecommunication lines are composed only of the communication terminal block of the internal communication terminal shown in the conventional example, and are used by being directly connected to the telecommunication line. . According to the conventional internal communication terminal connection means configured as described above, a general communication terminal that does not have a system interface block that is directly connected to a telecommunications line and used for communication with an external communication terminal can be used as an internal communication terminal within the system. It was impossible to use it as Furthermore, in order to use a general communication terminal as an internal communication terminal in a system, it is necessary to modify it so as to combine a communication terminal block and a system interface block included in the communication terminal. This leads to an increase in the cost of internal communication terminals, and when a new communication system is introduced in the home to communicate information with external communication terminals, the communication terminals that were used before the system was introduced cannot be used at all. There were such issues.

An object of the present invention is to provide a terminal adapter that solves the above problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a method for providing a communication terminal with electrical conditions and signal conditions similar to those when the communication terminal is directly connected to a telecommunications line. A terminal adapter is provided with a terminal power supply section, a tone generation section, a terminal state detection control section, and a communication control section 9 line switching section that executes communication functions in the system in place of the communication terminal when the communication terminal is not present. Connect between general communication terminals and system signal transmission paths.

Operation By using the terminal adapter according to the means described in -F of the present invention, even if it is a communication terminal for a general telecommunications line that does not have a communication function specific to the system, it can be connected to an external communication terminal using the signal transmission path of the system. It becomes possible to communicate information between the two.

Embodiment No. 11m shows the configuration of an embodiment of the terminal adapter of the present invention and an example of the system configuration when applied to an HBS.

In FIG. 1, l is a signal transmission path, and a control channel 1a is a signal transmission path for control signals in the system;
An information channel that is a signal transmission path for information communication between the external communication terminal 6 connected via the telecommunications line 7 of the external communication network 8 and the internal communication terminal 3m connected at multiple points to the signal transmission path l in the system. It consists of lb. 4 is a communication w4 terminal device, which connects the telecommunications line 7 and the information channel l.
It has functions such as line switching 9, outgoing control 9, and incoming call control, which are necessary for information communication between internal communication terminals in the system and external communication terminals via b. Further, 5 is a main device, which has functions such as managing the use of information channels and managing terminals within the system. Reference numeral 2 denotes a terminal adapter of the present invention, which is connected to the control channel 1a and the information channel 1b of the signal transmission line 1. Further, a communication terminal 3 for a telecommunications line, such as a standalone telephone, is connected to the terminal adapter 2 via a two-wire cable. The configuration of the internal communication terminal 3 is a telephone based on the configuration of the communication terminal block of the internal communication terminal 9 shown in FIG. Reference numeral 22 of the terminal adapter 2 is a communication control unit having a transmitting/receiving circuit 22a, and performs command communication between the communication w4 termination device 4 and the main device 5 via a control channel. Reference numeral 23 denotes a line switching section having a switching circuit 23a for connecting the information channel and the internal communication terminal 3. 27 is a terminal power supply unit, and even when the connected internal communication terminal 3 cannot receive power from the external communication w48 (for example, when the exchange circuit 23a is open), the power supply is superimposed. It becomes possible to receive power supply through the circuit 27a. (At this time, the communication path switch 28 is on the B side.) 24 is a terminal state detection unit, and an off-hook detection circuit 24b detects that the internal communication terminal 3 changes from an on-hook state to an off-hook state (communication path open); It is composed of an on-hook detection circuit 24a that detects a change to an on-hook state (communication path opening). The off-hook detection circuit 24b detects the current flowing from the terminal power supply section 27 when the internal communication terminal 3 opens the communication path with the communication path switch 28 set to the B side.

On the other hand, in the on-hook detection circuit 24a, the communication path switch 2
When 8 is on the M side and the exchange #123a is connected and receiving power from the external communication w48, a current interruption due to the communication path opening at the internal communication terminal 3 is detected. Reference numeral 25 denotes a tone generator, which detects when an incoming call from the external communication terminal 6 is detected by the communication network terminal device 4 and notifies the communication control unit 22 of the terminal adapter 2 in the system configuration procedure via the control channel 1a. , a calling signal generating circuit 25a that generates a discharge signal to the internal communication terminal 3, and a tone signal generating circuit 25a that generates a tone signal to inform the internal communication terminal 3 of the state such as whether the call is possible or not when the internal communication terminal 3 attempts to make a call to the external communication terminal. It is composed of a circuit 25b. Further, 26 is a dial receiving section, which includes a dial receiving circuit 26a.

FIG. 2 shows how the terminal adapter of the present invention is used to connect HBS.
An example of the sequence and operation of the terminal adapter when a telephone is connected as an internal communication terminal and a call is made from the telephone to a telephone on the public telephone network is shown below. In FIG. 2, circuits related to each operation of the terminal adapter are shown in parentheses.

When the telephone is on-hook, the terminal adapter's communication path switch is connected to the B side, and the current supplied from the terminal power supply unit raises the phone's hook (off-hook) to form a communication path, and the flowing current is detected as off-hook. Detected by the circuit. When off-hook is detected, a tone signal is sent from the tone signal generation circuit to the telephone, prompting the telephone user to send a selection signal (dial). The dial reception circuit receives the dial from the terminal, and if the dial number is O, it is determined that the call is to the public telephone network, and the exchange circuit connects the information channel and the communication path, and the communication path switch is set to the M side. Connect to.

Next, the terminal adapter sends a "1 channel request" command to the MBC through command communication via the control channel, and acquires the right to use the information channel to be used as a communication path within the system (r channel use permission J). Then N
A request is made to T to make a call to the public telephone network ("Call request 1"), and the right to use the public telephone line to which NT is connected is obtained (r line can be captured). Next, instruct the public telephone line to be connected to the information channel for which the license was previously obtained (
"Information channel connection" and "Information channel connection possible 1)
This establishes a communication path for the telephone to the public telephone network. After that, you dial the other party's phone number from your telephone, and depending on the other party's response, you enter into a conversation state. At that time, the terminal adapter uses an on-hook detection circuit to detect that the current supplied from the public telephone network and flowing through the communication path is cut off by lowering the phone's hook (on-hook). When on-hook is detected, it notifies the MBC and NT that the use of the information channel and the public telephone line is terminated ("line use end 1 and r channel use end"), and the exchange circuit separates the information channel and the communication path and switches the communication path switch to B. side and perform off-hook detection. It also instructs NT to cut off information channels and public telephone lines (r
Opening of information channels J).

Figure 3 shows HBS using the terminal adapter of the present invention.
The following shows an example of the sequence and operation of the terminal adapter when a telephone is connected to the public telephone network and a call is received from a telephone on the public telephone network.An incoming call from the public telephone network is detected by the NT, and the terminal adapter is notified by the control channel command. (“Incoming call J”).When the terminal adapter receives the notification of the incoming call, it sends a 16-16 call to the telephone using the ringing signal generation circuit.
Sends an intermittent H2 signal. This ringing signal causes the telephone bell to ring. The sequence from going off-hook with the telephone to entering a conversation state to ending the conversation by on-hook is the same as that described in FIG. 2, and will therefore be omitted.

FIG. 4 shows an example of the sequence and operation of the terminal adapter when an extension call is made between two types of telephones connected to the HBS using the terminal adapter of the present invention. When the dialed number sent after going off-hook with the telephone is 8, terminal adapter n determines that the call is an extension call to the telephone to which terminal adapter 8 is connected, and
After acquiring the right to use the information channel ("Channel request 1 and r channel usage permission 1"), connect the information channel and speech path using the exchange circuit, and send r extension call 1 to the terminal adapter 8 to instruct the information channel connection. I do("
Channel connection 1 and "Channel connection available"). The terminal adapter 8 sends a ringing signal to the connected telephone by the ringing signal generation circuit, and when it detects that the telephone is off-hook, it notifies the terminal adapter n that it has responded (r extension call response 1 and (Confirmation of incoming call response), both telephones enter an extension call state. When the terminal adapter detects that the telephone is on-hook, it notifies the terminal adapter to which the other party's telephone is connected that the extension call has ended (r Extension call termination J), and performs call termination processing (r Information channel configuration ” and “Channel usage termination 1).

Effects of the Invention According to the terminal adapter of the present invention, it is possible to connect a communication terminal used in a public telephone line to a small-scale communication system in the home such as an HBS without any modification or the like. It becomes possible to provide communication services using the functions that the system has.

In addition, by connecting to the terminal adapter of the present invention, communication terminals that do not originally have an extension communication function can be connected to each other.
Extension communication within the system becomes possible.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the terminal adapter of the present invention and an example of the system configuration when applied to an HBS, and FIG. 2 is a diagram showing an example of a system configuration when the terminal adapter of the present invention is applied to an HBS as an internal communication terminal. Figure 3 shows an example of the sequence and operation of the terminal adapter when making a call to a telephone on the public telephone network after connecting. FIG. 4 is a diagram showing an example of the operation, and FIG. FIG. 5 is a diagram showing an example of the configuration of a conventional internal communication terminal connected to a small-scale communication system accommodating a public telephone line. l... Signal transmission path, 2... Terminal adapter, 2
3... Line switching section, 23a... Switching circuit, 24...
・Terminal status detection unit, 24a...on-hook detection circuit,
24b... Off-hook detection circuit, 25... Tone generating section, 25a... Calling signal generating circuit, 25b... Tone signal generating circuit, 26... Dial receiving section, 26a
...Dial receiving circuit, 27...Terminal power supply section, 27
a...Power superimposition circuit, 28...Communication path switch, 3
...Internal communication terminal.

Claims (2)

[Claims] (1) A communication network termination device connected to an external communication network via a telecommunications line to a signal transmission path having a control channel and one or more information channels, and performing information communication via the telecommunications line. In a small-scale communication system in which a plurality of internal communication terminals and a main device that manages the use of the information channel by the internal communication terminals and the internal communication terminals are multi-point connected, the internal communication terminals and the signal transmission path are a terminal power supply unit that is connected between the terminals and supplies power to the communication terminal; a calling signal sending function that sends a calling signal to notify the internal communication terminal that there is an incoming call from another communication terminal; and the internal communication terminal. a tone generating section having a tone signal generation function for generating a tone signal to be sent to the internal communication terminal; an off-hook detection function for detecting the closing of a communication path; and an on-hook detection function for detecting the opening of the communication path in the internal communication terminal; a detection unit, a communication control unit having a transmitting and receiving function for performing command communication with another device or communication terminal connected to the signal transmission path via the control channel, and the internal communication terminal and the information channel. a line switching section having a switching function for connection; and a main control section controlling the terminal power supply section, tone generation section, terminal status detection section, communication control section, and line switching section; providing the communication terminal with the same electrical conditions as those received from the telecommunication line when the internal communication terminal is directly connected to the telecommunication line, and detecting off-hook of the internal communication terminal in the terminal state detection unit; The communication control unit connects the information channel and the telecommunication line and the information channel and the internal communication terminal according to a predetermined sequence between the communication network terminal device and the main device via the control channel. A communication path is formed to enable information communication between an internal communication terminal and a communication terminal of the telecommunication line, and when the terminal status detection unit detects on-hook of the internal communication terminal, the communication control unit controls the communication path. A terminal adapter characterized in that the information channel and the telecommunication line and the information channel and the internal communication terminal are disconnected according to a predetermined sequence between the communication network terminal device and the main device via the channel. (2) Controlled by the main control unit, it is equipped with a dial reception unit having a dial reception function for receiving a selection signal in the form of a PB signal and/or a pulse signal sent from a connected internal communication terminal, and If the number of the selected selection signal is a predetermined specific number, the system determines that the call is to the connected telecommunications line, and the communication control unit of the system sends the signal to the communication network terminal via the control channel of the signal transmission path. The information channel and the telecommunication line and the information channel and the internal communication terminal are connected according to a predetermined sequence between the device and the main device, and information between the internal communication terminal and the communication terminal of the telecommunication line is established. A communication path is formed to enable communication, and if the number of the selection signal first sent from the internal communication terminal is the corresponding number, other internal systems within the system defined by the number of the received signal are It is determined that the call is to a communication terminal, and the communication control unit of the system transmits the information according to a predetermined sequence between the main device and other internal communication terminals in the system via the control channel of the signal transmission path. The terminal adapter according to claim 1, characterized in that it connects a channel and both communication terminals.