JPS58218264A - Information transmission system - Google Patents

Abstract

PURPOSE:To transmit a specific information, by realizing the transmission of an intermittent signal for an emergency call by using a timer circuit for a specified period of time in an information transmission system where a time division multiple simultaneous conversation is possible to perform. CONSTITUTION:If a specific information is requested to be transmitted while performing conversation, a control timer 19 actuates forcibly an information transmission/conversation switching relay 3 for a specified period of time at a controlled place B to switch relay contacts 3a-3c so that the 2nd tone signal 20 is transmitted. At a controlling place A, the tone signal 20 is detected by the 2nd tone detector 18 to operate the relay 3 as the transmission request of the specific information, and its relay contacts 3a and 3b are switched so that the specific information can be transmitted. After that, the controlled place B transmits the specific information, and the control place A receives the information.

Description

[Detailed Description of the Invention] The present invention relates to a four-division multiplex multi-channel intercom operator capability information transmission system that uses a transmission line to transmit essential information even while making a C call. It is.

Heretofore, there has been a known information transmission system of this type, which is a town division multiplex communication power system, as shown in FIG. In Figure 1, the control station is A, and the controlled station is B, which is a six-circuit block configuration, and the circuits are the same. In FIG. 1, 1 is a phantom handset, 2 is a hook switch that works with the handset 1, 3 is a relay for information transmission and call switching, and 3a and 3b are the relays 3. 16.
Disconnector 6 for connecting to the line with the 4゜5ne Tsukuda amplifier
．． 1 is connected to the ``C transmission line t''. (Then, when the calling switch 8 is pressed, the tone fi1 is sent from the Elitone transmitter 9. 10 is a reband pan filter, 11 is an amplifier for the called tone signal,
A buzzer 13 is connected to a tone detector 12 and sounds for a called group. There are 14 Neri modulators and 15 Phantom modulators.

The operation of the conventional information transmission system constructed in this manner will be described below. That is, in FIG. 1, when the handset 1 is picked up while talking, the hook switch 2 linked to the handset 1 is closed. An energizing current flows through relay 3. Therefore, the output contacts 3a and 3b of the relay 3 are switched in the opposite direction to that shown in the figure, and the output terminals 3a and 3b of the relay 3 are switched to the transmission Mt via the handset 1 contacts 43a and 3b, the amplifier 4.5 and the disconnectors 6 and 7. A line is formed. When the switch 8 is closed together with this 1, a tone signal is generated from the tone oscillator 9, and the switch 8 and the amplifier 5
Similarly, the tone code is sent to the transmission 121t via the disconnector 7.The operation of the called side is almost the same, and the operation of the called side will be explained with reference to FIG. .

The transmitted tone signal reaches the divider 6 via the transmission path t, and is amplified by the amplifier 4 to a predetermined polarization level. Next, a necessary information frequency is extracted by a band-pass filter 10 and passed through an amplifier 11 and a tone detector 12 to make a beech sound. When the called party picks up the handset 1, as mentioned above,
The receiver 1 is now connected to the transmission line t for the first time. In this way, the handset 1 and the line are connected to enable the transmission of specific information.

However, in the various conventional circuit systems mentioned above, the U transmission line is connected to the handset during a call, so it is impossible to transmit specific information during a call. .

The present invention has the power to eliminate the conventional absenteeism as described above, and if necessary, even if a call is in progress, the tone number can be sent arbitrarily to notify the callee of specific information. The purpose of the present invention is to provide an information transmission method that automatically switches lines in Erie Town and reliably transmits specific information.

Hereinafter, one embodiment of the present invention will be explained in FIG. In the figure, the control station A and the controlled station B have slightly different circuit configurations, and they transmit specific information and control the controlled station H, which is effective only during a call. 4 control timer 19 has 1 control.

When transmission of a specific alarm is requested during a call, for example, the control timer 19 forces current to be passed through the information transmission/call switching relay 3 for one second every 10 seconds and connects the relay 3 at C7. A3a, 3b.

3c is switched to the opposite direction as shown in the figure, and the second tone @ No. 20 is sent out. Then, at the control center A, the transmission line t,
The tatone Tsukuda 3 passes through the control station's separator 6 and amplifier 4, passes through the bandpass filter 16, is amplified by the amplifier 17 (:'), is detected by the second tone detector 18, f1fc, and then sends specific information @request. Activate the relay 3 as shown in the figure in the opposite direction 1: W a 3 a', 3 b.

3c to enable transmission of specific information.

(During a call, intermittent current is forced to flow through the information transmission/call switching relay 3 at controlled station B from the control timer 19 in order to transmit specific information 3a, 3b, 3c.
Each relay contact shown in the figure is switched in the opposite direction to send out a tone signal for a second tone number 20. Then, at the control station A, the transmission line t and the disconnector 6 of the control station A are connected. □ Amplifier 4, a pass filter 1-6, an amplifier 17t- to which the tone signal is detected.The tone signal is detected by the second tone detector 18.n, this second tone For the operation of the detector 1B, a current is applied to the relay information transmission/call switching relay 3, and the relay 3 is connected A3a.

By switching 3b in the opposite direction to that shown in the figure, it is possible to twist and transmit information. After this, the control station A is forced to send out specific information from the controlled station B, and then the control station A is forced to receive the information. Of course, it will be impossible to make phone calls during this time, but it will only be possible to transmit urgent and specific information between the six groups (T'1), so it will be practically impossible.

'ifc, return to the call. Controlled station B has finished sending the specific information. Control station A has finished receiving the specific information.

In the above embodiment, the case of a control station and a controlled station with a 1:1 ratio as a counter force type was explained, but the same applies when the relationship between the control station and the controlled station is 1:n. It has the effect of (The power in the case of the 1:n method is reduced by the ratio of interruptions of specific information during a call, so the influence on the call is further reduced.

As described above, according to the present invention, as a method for interrupting specific information (emergency information, etc.) in a telephone call of an information transmission device, a timer circuit for a predetermined period is used to make an emergency call to the extent that it does not interfere with the telephone call. Since it is possible to transmit FM frequency signals (1), it is possible to control the transmission of specific information by automatically detecting As the power of NFCQ division multiplexing increases, it has the effect of sweeping information transmission power.

[Brief explanation of the drawing]

The first control station and the controlled station are shown in common. It is a block diagram of a transmission power type. 1... Handset, 2... Hook switch, 3...
Information transmission/call switching relay, 4, 5... amplifier, 6,
7, 1...Disconnector, 8...Call switch, 9...Tone transmission! , 10...Band pass filter, 11...
- Amplifier, 12... Tone detector, 13... Calling buzzer, 14... Belly tuner, 15... Modulator, 16.
・Band pass filter for second tone detector, 17・
...Amplifier for tone detector 2, 18...Second tone detector, 19...Control timer circuit section, 20.
...Second tone generator. Hiko, the same symbol in the figure shows the corresponding part. Representative Tsukuda Kuzuno - (11 people) Figure 1 Figure 2

Claims (1)

[Claims] A relay is provided for switching between information transmission and call information, and the relay is energized to perform four-division multiplex simultaneous communication between the control center and the controlled station in a deaf-type information transmission system. A large control timer for forcibly interrupting the information transmission and call switching relay during a call to transmit specific information; and a tone declination angle detector for detecting a tone declination angle, and a relay in the control center is switched from a telephone call to a tone declination according to the detection by the tone declination detector. information transmission method.