JPH03175868A - Multiple information transmission system - Google Patents

Abstract

PURPOSE:To simplify constitution by permitting an intra-station device to transmit information on plural channels to a terminal equipment by means of a multiplex signal and permitting a terminal-side to select a desired signal. CONSTITUTION:When call detection circuits 9 and 23 detect the vacancy of a subscriber line 20, they operate relays A and B and the information transmission of a multiplex transmission circuit 26, an amplifier 25, contact points a1 and a2, a terminal-side line 22, contact points b1 and b2 and a reception circuit 11 is formed. The circuit 26 outputs the signal of an information channel as a multiplex signal MS and the circuit 11 receives it. A desired channel is set in a selection circuit 13 and a selection signal S is supplied to the circuit 11. The circuit 11 selects the channel corresponding to the signal S among the signals MS. The circuit 23 detects a call signal IR and restores the relay A while the circuit 9 is transmitting sound. Then, a sound information output operation stops. When a telephone set 4 makes origination while an sound information output is operated, the circuits 9 and 23 detect off-hook and the relays A and B are restored. Thus, constitution is simplified and the fault rate of a system is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multiplex information transmission system that utilizes the idle time of subscriber lines of a telephone exchange.

(Prior art) The subscriber line idle time utilization service method is disclosed in, for example, a patent application filed by the same applicant as the present applicant, and Japanese Patent Application No. 81-818.
! 3, it is constructed by connecting a terminal device to the terminal side of a telephone line that connects the telephone exchange and the terminal, and an in-office device to the inside of the office. The in-office device has a plurality of information channels depending on the type of information to be sent to the terminal device. In the conventional subscriber line idle time utilization information transmission system, a channel selection signal for selecting a desired information channel is sent from a terminal device to an in-office device during line idle time, and the in-office device selects a channel according to the selection signal. Select 1. The information is configured to be sent to the terminal device.

(Problems to be Solved by the Invention) The conventional system is such that a terminal device sends a channel selection signal to an in-office device to select an information channel. That is, both devices have a channel selection function,
It is necessary to send and receive control information between the devices, and the circuit configuration is therefore complicated. As a result, the failure rate is relatively high, repairs take time, and service quality deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to provide an information transmission system for a subscriber line idle time service that eliminates this drawback, simplifies the device configuration, and improves serviceability.

(Means for Solving the Problems) In the multiplex information transmission system that utilizes subscriber line idle time according to the present invention, the information channel selection function is provided only on the terminal device side.

In the multiplex information transmission method according to the present invention that utilizes subscriber line idle time, terminals are accommodated in a telephone exchange via telephone lines, in-office equipment is connected to the exchange side of the telephone line, and terminals are connected to the terminal side of the telephone line. is connected to a terminal device, the in-office device monitors the telephone line for blockage, and when the telephone line is free, multiplexes the signals of multiple information channels and sends them out to the telephone line. and selectively outputs a signal of a desired channel among these signals.

According to the present invention, the terminal device is connected to the exchange side of the telephone line accommodating the terminal in the telephone exchange, and the terminal device is connected to the terminal side of the telephone four-wire, and when the telephone line is idle, the signal of the plurality of information channels is The in-office equipment in the multiplex information transmission system that utilizes the idle time of the subscriber line to selectively output signals of desired channels from the terminal equipment includes a connecting means for connecting the terminal side of the telephone line, and a connecting means for connecting the terminal side of the telephone line; The exchange! i! ! a call detection means connected to the machine side and the connection means to detect incoming/outgoing calls and availability on the telephone line; a multiplex transmission means to which signals from a plurality of information channels are input, multiplex the signals and output the signals to the connection means; When the call detecting means detects that the telephone line is vacant, it causes the connecting means to connect the terminal side of the telephone line to the multiplex transmitting means, whereby the multiplex transmitting means transmits the multiplexed signal to the telephone line. When the call detecting means detects an outgoing or incoming call on the telephone line, it causes the connecting means to release the telephone line, and the terminal equipment receives the multiplexed signal. Then, the signal of the desired channel among the signals is selectively output.

Further, according to the present invention, the telephone exchange is connected to the terminal side of the telephone line that accommodates the terminal, and the in-office equipment is connected to the exchange side of the telephone line, and among the signals of the plurality of information channels inputted to the in-office equipment, In a terminal device in a multiplex information transmission system that utilizes subscriber line idle time to selectively output a signal of a desired channel when the telephone line is idle, the in-office equipment monitors the telephone line for idle time. , when the telephone line is idle, the signals of the plurality of information channels are multiplexed and sent to the telephone line, and the terminal device is connected to the terminal side of the telephone line and detects the incoming and outgoing calls and the idleness of the telephone line. a selection means for selectively specifying one of the plurality of information channels; and a receiver for receiving the multiplexed signal and separating and outputting the signal of the information channel specified by the selection means from the received signal. and a connecting means connected to the terminal side of the telephone line, for connecting the telephone line to the receiving means when the telephone call detecting means detects that the telephone line is vacant; When the receiving means receives the multiplexed signal from the telephone line, the receiving means separates and outputs the signal of the information channel specified by the selecting means. When an outgoing or incoming call is detected, the connection means releases the telephone line, thereby selectively outputting a signal of a desired channel among the multiplexed signals.

(Function) The multiplex information transmission method using subscriber line idle time according to the present invention has an in-office device connected to the inside of the telephone line,
It consists of a terminal device connected to the terminal side. In the in-office device, when the call detection means detects that the line is vacant, the multiplex transmission means is connected to the line. The multiplexing transmission means multiplexes the information of a plurality of channels and sends it out to the line as a multiplexed signal.

On the terminal device side, when another call detection means detects that the line is vacant, it connects the receiving means to the line. The receiving means receives the multiplexed signal from the line, separates a signal corresponding to the selection of the information channel by the selection means from the multiplexed signal, and outputs the information.

In this way, by providing an information channel signal multiplexing function in the in-office equipment and a channel selection function in the terminal equipment, the desired information can be received on the terminal side. becomes simple.

(Embodiment) Next, an embodiment of the multiplex information transmission system using subscriber line idle time according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a functional block diagram showing an embodiment of the multiplexed information transmission system of the present invention. The tree type is telephone exchange 1 and telephone 4j.
j! An in-office device 2 and a terminal device 3 are connected to a subscriber line 20 that connects the subscriber line 4. This system has a function in which the in-office device 2 sends a plurality of types of information to the subscriber line 20 using the idle time of the subscriber line 20, and the terminal device 3 selects the desired information from among them.

The in-office device 2 is placed in a telephone exchange, and the terminal device 2 is placed in a subscriber's premises. A subscriber line 20 connecting the two is a two-wire loop telephone line, which passes through an in-office device 2 and has switching contacts al and a2 of a relay A inserted in series in the two wires. In the in-office device 2, contacts al and a2 are in the illustrated recovery position under normal conditions. When relay A operates, subscriber line 20 is separated into exchange side line 21 and terminal side line 22. Line 21 is always connected to a call detection circuit 23, and line 22 is drawn into this circuit 23 and an amplifier 25 via operating contacts a1 and a2.

The call detection circuit 23 is a circuit that constantly monitors the signal of the subscriber line 20 from the line 21 and detects the incoming and outgoing calls of the telephone 4 and the availability of the line. When the circuit 23 detects a vacant space, it operates the relay A and activates the multiplex transmission circuit 26. The multiplex transmission circuit 2B has input terminals s1. t2~tl
This is a circuit that multiplexes the signals of n information channels input into the circuit and outputs it as a multiplexed signal MS.

Amplifier 25 amplifies and outputs multiplexed signal MS.

The signal MS is transmitted from the operating contacts a1 and a2 to the terminal side line 22.
is input into the terminal device 3 through . On the other hand, the call detection circuit 23
When detecting that the subscriber line 20 is vacant, it operates relay A to draw in the terminal side line 22 as well. During idle time, incoming calls from the exchange 1 to the telephone 4 are monitored, and outgoing calls from the telephone 4 from the line 22 are monitored. When an incoming/outgoing call is detected, relay A
is restored, the line 21 from the exchange 1 is extended to the subscriber line 20, and connection with the telephone 4 is established.

The terminal device 3 has a call detection circuit 9, which is always connected to the terminal side line 22 and is a circuit that detects the incoming and outgoing calls of the telephone 4 and the availability of the subscriber line 20. When a vacant space is detected, relay B is activated.

The terminal device 3 also has a receiving circuit 11, which receives the multiplexed signal MS from the subscriber line 20 by connecting the terminal side line 22 through the contacts bl and b2 of the relay B.

A selection circuit 13 is connected to the receiving circuit 11, and this circuit 2 is a circuit for a user to selectively set a desired channel among the n information channels 111 to 111. The signal S is output to the receiving circuit 11. The receiving circuit 11 separates the signal of the channel corresponding to the selection signal S from the received multiplexed signal MS and sends it to the speaker 1.
This is a circuit that outputs to 2.

As a result, the user is provided with the audio of the audio information service. When the call detection circuit 9 detects an incoming or outgoing call from the telephone 4, it restores the relay A, thereby stopping the output of audio information from the speaker 12.

Next, the operation of this embodiment will be explained. Each call detection circuit 23 and 9 of the in-office device 2 and the terminal device 3 connects to the subscriber line 20.
When a vacant space is detected, relays A and B are operated respectively, whereby multiplex transmission circuit 26 - amplifier 25 - operating contacts a1 and a2 - terminal side line 22 - operating contact b1
and b2--the information transmission path of the receiving circuit 11 is formed.

The multiplexing circuit 26 multiplexes signals of n information channels inputted to input terminals #1, II2 to #n, and outputs a multiplexed signal MS. The signal MS reaches the terminal device 3 through this information transmission path. The receiving circuit 11 of the terminal device 3 receives the multiplexed signal MS.

On the other hand, a channel desired by the user is set in the selection circuit 13, and a channel selection signal S representing it is input and supplied to the reception circuit 11. The receiving circuit 11 selects channel information corresponding to the selection signal S from the received multiplexed signal MS, and drives the speaker 12 with the audio information.

By the way, the telephone 4 is connected from the exchange 1 through the subscriber line 20.
When a call arrives at , a ringing signal IR is sent from the exchange 1 to the exchange line 21. Call detection circuit 2 of in-office device 2
3 detects the calling signal IR and restores the relay A if voice information is being transmitted at that time. On the other hand, the calling signal IR passes through contacts al and a2 and is input to the terminal device 3 and the telephone 4. In the terminal device 3, a call detection circuit 9
detects the calling signal IR, and if audio information is being outputted at that time, relay B is restored. This stops the audio information output operation.

When the telephone 4 makes a call while the terminal device 3 is outputting audio information, the call detection circuits 9 and 23 of the recovery devices 3 and 2 detect the off-footer state and restore the relays B and A, respectively. This repeating of relays B and A produces the same effect as the above-mentioned incoming call to telephone 4, and therefore the operation of transmitting voice information is stopped in the same manner as described above.

(Effects of the Invention) According to the present invention, an in-office device sends a signal in which information on multiple channels is multiplexed to a terminal device, and the terminal device side selects a desired signal from among those channels. has been done. Therefore, the transmission and reception of a selection signal from the terminal device to the in-office device and the channel selection function in the in-office device in the conventional system are unnecessary, the configuration is simplified, and the failure rate of the system is reduced.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a multiplex information transmission system that utilizes subscriber line idle time according to the present invention. l,. 2. 3. 4. 8.23°11. 13. 20. 2B. A, B,. Explanation of symbols for main parts, telephone exchange, in-office terminal equipment, telephone, call detection circuit, receiving circuit, selection circuit, subscriber line, multiplex transmission circuit, relay

Claims (1)

[Scope of Claims] 1. A terminal is accommodated in a telephone exchange via a telephone line, an in-office device is connected to the exchange side of the telephone line, a terminal device is connected to the terminal side of the telephone line, and The in-office equipment is
Monitor the telephone line for blockage, and when the telephone line is free,
multiplexing signals of a plurality of information channels and transmitting the signal to the telephone line, the terminal device receiving the multiplexed signal,
A multiplex information transmission system characterized by selectively outputting a signal of a desired channel among the signals, thereby making use of idle time on a subscriber line. 2. Connected to the exchange side of a telephone line that accommodates a terminal in a telephone exchange, a terminal device is connected to the terminal side of the telephone line, and when the telephone line is idle, a desired one of the signals of a plurality of information channels is connected. In an in-office device in a multiplex information transmission system that utilizes idle time of a subscriber line to selectively output a channel signal from the terminal device, the in-office device comprises a connecting means for connecting the terminal side of the telephone line; call detection means connected to the exchange side of the telephone line and the connection means to detect incoming and outgoing calls and availability on the telephone line; signals of the plurality of information channels are inputted and the signals are multiplexed to the connection means; and a multiplex transmission means for outputting an output to the multiplex transmission means, and when the call detection means detects that the telephone line is vacant, the call detection means causes the connection means to connect the terminal side of the telephone line to the multiplex transmission means, thereby The multiplex transmitting means transmits the multiplexed signal from the terminal side of the telephone line to the terminal device, and the call detecting means detects an outgoing call or an incoming call on the telephone line, and transmits the multiplexed signal to the connecting means. The telephone line is disconnected, and when the terminal device receives the multiplexed signal, it selectively outputs a signal of a desired channel among the signals, thereby reducing the idle time of the subscriber line. In-office equipment in a multiplexed information transmission system that uses 3. A telephone exchange is connected to the terminal side of a telephone line that accommodates a terminal, and an in-office device is connected to the exchange side of the telephone line, and a desired one of the plurality of information channel signals input to the in-office device is connected to the terminal side of the telephone line that accommodates the terminal. In a terminal device in a multiplex information transmission system that selectively outputs a channel signal when the telephone line is idle and utilizes the idle time of the subscriber line, the in-office device monitors whether the telephone line is blocked. and when the telephone line is idle, the signals of the plurality of information channels are multiplexed and sent to the telephone line, and the terminal device is connected to the terminal side of the telephone line to make and receive calls on the telephone line. and call detection means for detecting availability, selection means for selectively specifying one of the plurality of information channels, and receiving the multiplexed signal and selecting the signal of the information channel specified by the selection means. a receiving means for separating and outputting the received signal; and a connecting means connected to a terminal side of the telephone line, and connecting the telephone line to the receiving means when the call detecting means detects a vacant space; When the call detecting means detects that the telephone line is vacant, the telephone line is connected to the receiving means by the connecting means, and when the receiving means receives the multiplexed signal from the telephone line, the telephone line is connected to the telephone line. separating and outputting the signal of the information channel specified by the means, and when the call detecting means detects an outgoing or incoming call on the telephone line, causes the connecting means to release the connection of the telephone line; thereby, A terminal device in a multiplexed information transmission system that selectively outputs a signal of a desired channel among the multiplexed signals, thereby making use of idle time on a subscriber line.