JPS6321384B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a multi-terminal control device in a telephone switching network, and more particularly to an automatic selection termination device for a plurality of terminals.

Technical Background The simplest method for controlling multiple terminals of this type is manual switching. For example, in the case of telephone and facsimile, the method is to first make a telephone conversation, confirm with each other that they want to switch to facsimile, and then both parties operate a manual switch. That is, it is a manual switching method.

As an example of a second method that improves this, an automatic facsimile answering device or a terminal switching control device that can connect many types of devices (for example, a
042675) etc. These systems distinguish between incoming calls to the telephone and incoming calls to other terminals by automatically answering a facsimile or other type of terminal if the telephone does not answer within a certain period of time after receiving the call.

Furthermore, as another method of the third method, there is a ringless facsimile call. (For example, Nippon Telegraph and Telephone Public Corporation Telecommunication Research Institute Research and Practical Application Report Vol. 29 No.
1P24) This is a method that uses a 1300Hz tone as the calling signal for a facsimile, instead of using the conventional 16Hz.

Conventional Technology and Problems With the conventional manual switching method, facsimile communication is not possible when the called party is absent, and even in cases where human intervention is not required, such as when receiving a facsimile call, a person is required to answer the call once. There were other drawbacks. In addition, in the terminal switching control device as an example of the second method described above, which is an improvement on this manual switching method, when a call is made to the telephone of this device and the other party waits to answer, a terminal other than the telephone responds. If the phone is closed, you may be charged but unable to make calls.
In addition, since it is not possible to identify which terminal the call is coming from when the bell rings, it is inconvenient to pick up the receiver even when there is no need for someone to answer, such as when receiving a call to a facsimile machine, etc., similar to the manual switching method described above. There is. Furthermore, in the third method described above, incoming calls to a telephone ring the bell, and incoming calls to a facsimile are automatically received without ringing, which solves the problem of the previous example, but adds a new ringing signal of 1300 Hz. Therefore, it was necessary to modify the switching equipment, and it was not an economical method.

Purpose of the Invention The present invention provides a charge-free response to an incoming call (which closes a loop without charge, and is used for a toll-free trunk such as number 104), a terminal type identification signal, or a signal. The feature is that after identifying the receiving terminal based on the absence of a call, the receiving side responds and charges are made.The purpose is to automatically selectively receive calls to multiple types of terminals without modifying the existing telephone exchange network. It is in the realization.

Embodiment of the Invention FIG. 1 shows an example in which the multiple terminal control device of the present invention is applied to a telephone switching network, where 1 is a telephone;
2 and 3 are different types of terminals other than telephones,
For example, 2 is a facsimile transceiver (hereinafter abbreviated as facsimile), and 3 is a keyboard printer.
4 is a multiple terminal control device according to the present invention, 5 is a pair of subscriber lines (hereinafter referred to as subscriber lines), 6 is an exchange,
7 is a relay network. The multiple terminal control device 4 according to the present invention thus connects the subscriber line 5 and the multiple terminals 1.
It is installed between 3 and 3 to control the incoming and outgoing calls of multiple terminals, and is generally installed in the subscriber's premises.

FIG. 2 shows an example of the internal configuration of the multi-terminal control device 4 according to the present invention, in which 8 is an incoming call detector connected to the subscriber line 5 through a relay contact a, and 10 is an incoming call detector 8 connected to the subscriber line 5 through a flip-flop ₉₁ . 11 is a relay A connected to the output of the flip-flop 9 ₁ through an OR gate 36 ₁ , 12 is a relay C connected to the timer 10 through a flip-flop 9 ₂ , 13 is a contact c ₁ ,
Type identification signal receivers 19 and 20 are connected to subscriber line 5 through b ₁ and a, and their outputs are connected to relays D at 17 and relay E at 18 through flip-flops 9 ₃ and 9 ₄ . Reference numeral 14 denotes an identification request signal transmitter/partner abandonment detector connected to the subscriber line 5 through contacts b _{1 and} a;
_{The output of flip-flop 9 1 ,}
Connected to reset terminals 9 ₂ , 9 ₃ , 9 ₄ , and 9 ₅ . Reference numeral 15 denotes a non-charge answering device connected to the subscriber line 5 through contacts _b1 and a and used in a toll-free trunk such as number 104, for example. 16
is a loop detector which is connected to the subscriber line 5 through contacts b ₁ and a, and to the telephone 1 or facsimile 2 or keyboard printer 3 through contacts b ₃ and C ₂ or d or e, and its output is connected to contact b ₂ to the reset terminals of flip-flops 9 ₁ , 9 ₂ , 9 ₃ , 9 ₄ , 9 ₅ . 17 and 18 are relays D and E connected to the type identification signal receiver 13 through flip-flops 9 ₃ and 9 ₄ . 21 is a response detector 22 and contacts b ₃ and c ₂ or d or e
It is an activation signal generator connected to a telephone 1 or a facsimile 2 or a keyboard printer 3 through the terminal. 23 is a relay B connected to the output of the response detector 22 through a flip-flop ₉₅ . 2
5 is a call detector 3 through a flip-flop 9 ₆ , an or gate 36 ₃ , and an AND gate 24 ₁ , 24 ₂
This is relay I connected to 5 ₁ and 35 ₂ . 26,
27 and 28 are flip-flops 9 ₇ and 9, respectively.
₈ , 9 ₉ , and relays H, G, and F connected to call detectors 35 ₃ , 35 ₂ , and 35 ₁ through AND gates 24 ₃ , 24 ₂ , and 24 ₁ . 29 has an output connected to the subscriber line 5 through a reverse detector 30, a loop detector 31, and a contact a, and a dial switch 3.
This is a selection signal transmitter whose input is connected to 4. 3
0 is a loop detector 31, connected to the subscriber line 5 through contact a, and a reverse detector connected to telephone 1 or facsimile 2 or keyboard printer 3 through contacts h, c ₂ or g, d, or f, e; Its output is connected to the reset terminal of flip-flop ₉₆ through OR gate ₃₆₂ .
31 is a loop detector, which is connected to the subscriber line 5 through contact a and also connected to the reverse detector 30, the output of which is sent to flip-flops 9 ₇ , 9 ₈ , 9 _{9 .}
and is connected to the reset terminal of ₉₆ via the OR gate ₃₆₂ . 32 is an identification request signal receiver; 33
is a type identification signal transmitter and is connected to the subscriber line 5 through a contact i, a reverse detector 30, a loop detector 31, and a contact a. The output of the identification request signal receiver 32 is connected to the input of the type identification signal transmitter 33. The signal type input of the type identification signal transmitter 33 is as follows:
Flip-flop 9 ₈ , 9 ₉ , AND gate 24 ₂ ,
24 ₁ to call detectors 35 ₂ , 35 ₁ . The call detectors 35 ₃ , 35 ₂ , 35 ₁ have contacts h,
It is connected to the telephone 1 or facsimile 2 or keyboard printer 3 through c ₂ or g, d or f, e. 37 is an incoming call lamp connected to the incoming call detector 8 through the flip-flop ₉₁ , and 38 is a call response lamp connected to the output of the reverse detector 30.

The present invention is characterized by being composed of the following four functional sections each consisting of each of the above-mentioned constituent elements.

Incoming call detector 8, flip-flop 9 ₁ , OR gate 36 ₁ , relay A11, OR gate 36 ₄ , relays H, G, F26-28, flip-flop 9
₇ , 9 ₈ , AND gates 24 ₁ to 24 ₃ , and call detectors 35 ₁ to 35 ₃ . a call detection unit that controls the outgoing connection of the subscriber terminal based on logic with the output of the incoming call detector that detects blockage, an identification request signal receiver 32, a type identification signal transmitter 33, and call detectors 35 ₁ , 35 ₂ , AND gates 24 ₁ , 24 ₂ , flip-flops 9 ₉ , 9 ₈ , relay I 25, flip-flop 9 ₆ , OR gate 36 ₃ , reverse detector 30, and OR gate 36 _2. In the outgoing connection of the terminal, the output of a type identification signal transmitter that transmits a type identification signal of the calling non-telephone subscriber terminal to the called side in response to a type request signal from the called side; a non-telephone subscriber terminal origination connection control unit that controls connection from the non-telephone subscriber terminal based on logic with a DC reverse signal from the exchange in response to a response from the side; an identification request signal transmitter/party abandonment detector 14; Non-charging response device 15, incoming call detector 8, flip-flop 9 ₁ , or gate 3
6. In the incoming call connection to the subscriber terminal consisting of relay A11, timer 10, flip-flop 9 ₂ , relay C12, activation signal generator 21, and response detector 22, the transmission path with the other party's calling terminal is set. , which identifies whether the calling terminal is a non-telephone type or a telephone based on the presence or absence of a type identification signal from the calling terminal, and controls the connection with the corresponding called subscriber terminal. From the billing response unit, identification request signal sender/partner abandonment detector 14, type identification signal receiver 13, flip-flops 9 ₃ , 9 ₄ , relays D, E 17, 18, activation signal generator 21, response detector 22 In incoming connections to said different types of non-telephone subscriber terminals configured,
By the output of the type identification signal receiver that receives the type identification signal from the called terminal, the output of the activation signal generator is activated by inputting a response signal from the corresponding non-telephone subscriber terminal on the called side. and a non-telephone subscriber terminal incoming call connection control section that controls incoming call connection to the non-telephone subscriber terminal.

Next, referring to FIG. 2, a description will be given of a call originating from the telephone set 1. When the handset of telephone 1 is raised, a DC loop of telephone 1 is formed, and contacts c ₂ ,
A call is detected by the call detector 35 ₃ through h,
Its output changes from low to high. If there is no incoming call at this time, the output of the flip-flop ₉₁ connected to the incoming call detector 8 is high, so the output of the AND gate ₂₄₃ also changes from low to high, and the output of the flip-flop ₉₇ is inverted to low. 2
Relay A of 11 becomes operational through relay H of 6 and two OR gates 36 ₄ and 36 ₁ .
Contacts a and h operate, and telephone 1 contacts c ₂ , h,
Reverse detector 30, loop detector 31, contact a
It is connected to the subscriber line 5 through. Thereafter, a dial tone is sent from the exchange 6, a selection signal is sent by dialing the telephone 1, and if the other party answers, the call can be made. When the telephone call is over, the handset of the telephone 1 is put down, and the loop detector 31 detects that the current flowing through the subscriber line has changed from about 50 to 20 mA to 0 mA, and outputs a high pulse. Therefore, the flip-flop ₉₇ connected to this output is reset, and the flip-flop ₉₇ connected to this output is reset.
The output changes from low to high, 26 relays H and 11 relays A become inactive, and the multi-terminal control device 4 returns to its initial state.

Next, calling from the facsimile 2 will be explained. Since the facsimile 2 makes a call, when the loop is closed, the call detector 35 ₂ passes through contacts d and g.
The output of the call detector ₃₅₂ changes from low to high, and the output of the flip-flop ₉₈ changes from high to low through the AND gate ₂₄₂ .
As a result, relay G of 27 and relay A of 11 are activated through OR gates 36 ₄ and 36 ₁ , and AND gate 24 ₂ and OR gate 3 are activated.
Through ₆₃ , the output of flip-flop ₉₆ changes from high to low, and relay I of 25 operates. By operating the contacts g and a, the facsimile 2 is connected to the subscriber line 5 through the contacts d and g, the reverse detector 30, the loop detector 31, and the contact a.
Generally, the facsimile 2 does not have a selection signal sending function, so pressing the dial switch 34 activates the selection signal sender 29 and sends out the selection signal using a PB signal or dial pulse. When the multi-terminal control device 4 on the called side receives a call, it responds without charge and sends out an identification request signal, as will be explained later. This identification request signal transmitter 14 has a frequency of, for example, 1750±100Hz, 300bit/sec or 170±100Hz.
Code that is FS signal such as 400Hz, 1200bit/sec,
For example, an ENQ or the like may be sent, or a voice band tone signal, such as a 1750 Hz, 1 second tone, etc. may be sent. These are for a certain period of time, for example, 3
It is assumed that transmission is performed for 1 second every second, and when there is no signal, the type identification signal, which is a response to the identification request signal, is transmitted from the originating side. Of course, if these two signals use different frequency bands, they can be transmitted and received at the same time, but here we will discuss the case where they are transmitted at a constant period for a constant time. In particular, as this identification request signal transmitter 14,
400Hz amplitude modulated at 16Hz, 1 at 3 seconds period
If the caller is sent from a regular telephone, this signal is the same as the ringback tone sent from the exchange during a call to the other party, so the caller from a regular telephone can receive a call from a regular telephone even during a call to this multi-terminal control device. This has the advantage that the caller is in the same state as during a call, and the caller does not feel strange.

In the multi-terminal control device 4 on the calling side that is currently being explained, the I relay 25 is in the operating state and the contact i is closed as described above, so the identification request signal receiver 32 and the type identification signal transmitter 33 are in the operating state and the contact i is closed. is connected to the subscriber line 5 through contact i, reverse detector 30, loop detector 31, and contact a. When an identification request signal is returned from the other party in this state, it is received by the identification request signal receiver 32. The identification request signal receiver 32 receives the identification request signal, and when the signal is cut off, generates a transmission request pulse to the type identification signal transmitter 33. The type identification signal transmitter 33 is
When it receives this pulse, it sends out a signal corresponding to the calling terminal. This signal is 1750±100Hz,
300bit/sec, or 1700±400Hz, 1200bit/sec
FS signal or pushphone selection signal
PB signals etc. can be used. For example, when using PB signals, if the calling terminal is facsimile 2,
For example, 697Hz and 1209Hz signals corresponding to PB signal "1" are sent for 200ms, and if the calling terminal is keyboard printer 3, 697Hz corresponding to PB signal "2" is sent.
For example, we will send a 1336Hz signal for 200ms. When using FS, signals with different codes will be sent depending on the type of calling terminal. The identification of the calling terminal is stored in flip-flops 9 _{9 and} 9 ₈ connected to the F relay 28 and the G relay 27 _.
The output of the type identification signal transmitter 33 is connected to the type identification signal transmitter 33. When a call is made from facsimile 2, which is currently being explained, the output of flip-flop ₉₈ connected to G relay 27 is low, and the output of flip-flop ₉₉ connected to F relay 28 is high. When a transmission request pulse is received from the identification request signal receiver 32, the type identification signal transmitter 33 uses the aforementioned PB signal as the type identification signal.
Sends 697Hz and 1209Hz signals corresponding to “1” for 200ms. When this signal is received by the other party and the called party's facsimile is activated and the facsimile responds, the exchange 6 sends a DC reverse signal, the reverse detector 30 detects this, and this output changes from low to high, causing an OR gate. The flip-flop ₉₆ is reset through ₃₆₂ , the output of the flip-flop 96 changes from low to high, and the output of the flip-flop ₉₆ changes from low to high.
relay I is inoperative and contact i is open, causing identification request signal receiver 32 and type identification signal transmitter 33
is disconnected from the subscriber line 5, and the other party response lamp 38 lights up to notify the operator that the other party has responded. Seeing this, the operator operates the facsimile machine 2 to send and receive documents, and when the process is completed, the loop created by the facsimile machine 2 is released. Due to this loop opening, the current in subscriber line 5 is approximately 50mA.
It changes from ~20mA to 0mA, and the loop detector 31 detects this change and outputs a high pulse.
Therefore, the flip-flop ₉₈ connected to this output is reset, the output changes from low to high, and the currently operating 27 relays G and 11 relays A become inactive, leaving the multi-terminal control device 4 in its initial state. become.

When the calling terminal is the keyboard printer 3, the operation is the same as in the case of the facsimile 2, except that relay F, 28, operates instead of relay G, 27.

Next, incoming calls will be explained.

First, when there is an incoming call from the subscriber line 5, the incoming call detector 8 detects a direct current inversion or a 16Hz bell signal,
Its output changes from low to high, flip-flop ₉₁ is set, and the output of flip-flop ₉₁ goes from high to low. As a result, relay A of 11 operates, timer 10 of approximately 3 seconds starts operating, and the outputs of AND gates of 24 ₁ , 24 ₂ , and 24 ₃ are fixed low, prohibiting calls from the terminal and receiving incoming calls. The incoming call lamp 37 indicating that the call is inside is lit. 1
Contact a is activated by the operation of relay A of No. 1, and the subscriber line 5 is disconnected from the incoming call detector 8, and the non-charging response device 15, the identification request signal transmitter, the callee abandonment transmitter 14, and the contact are connected through contact _b1 . It is connected to the type identification signal receiver 13 through _c1 . The non-charge answering device 15 is used as a toll-free trunk for incoming calls such as numbers 104, 105, and 100, and uses the same principle as that known for magic telephones, etc., and does not return DC reverse. In this method, a transmission path is set up with the other party while charging of the exchange 6 is stopped. This makes it possible to communicate with the other party without charge, so that if the output of the identification request signal transmitter 14, for example, a signal equivalent to the ring back tone described above, is sent as an identification request signal, it will reach the other party. If the called party is a telephone, no type identification signal will be sent to it, and therefore no output will be output from the type identification signal receiver 32. After about 3 seconds, timer 10 operates, the output of flip-flop ₉₂ changes from high to low, and 12 relays C operate. As a result, the contact c ₁ is opened, the type identification signal receiver 13 is disconnected, the contact c ₂ is switched, and the telephone 1 is connected to the activation signal generator 21 through the contacts c ₂ , b ₃ and the response detector 22. Ru. A level signal (16 Hz, 3 second cycle, 1 second transmission) output from the activation signal generator 21 causes the bell of the telephone 1 to ring, notifying the user of an incoming call. When the handset of the telephone 1 is picked up and answered, the response detector 22 detects the formation of a DC loop, its output changes from low to high, flip-flop ₉₅ is set, and the output of flip-flop ₉₅ changes from high to low. change,
23 relay B operates. This causes contact b ₁ ,
b ₂ and b ₃ are activated, and the telephone 1 is connected to the subscriber line 5 via the contacts c ₂ and b ₃ , the loop detector 16, and the contacts b ₁ and a. On the other hand, the exchange 6 starts billing in response to the billing response from the telephone 1 in the loop. After this,
When the handset of telephone 1 is placed, loop detector 1
It detects that the current flowing through 6 changes from about 50mA to 20mA to 0mA, and outputs a high pulse signal through contact _b2 . This pulse resets the flip-flops 9 ₁ , 9 ₂ , 9 ₅ , the 11 A relays, the 23 B relays, and the 12 C relays become inactive, and the multiple terminal control device 4 returns to its initial state.

If the calling side disconnects the call before the called side responds, the exchange side of the subscriber line 5 becomes open, and the impedance of the subscriber line 5 changes from about 600Ω to high impedance, so the identification request signal transmitter/party abandonment detection occurs. The device 14 detects abandonment of the other party by an increase in voltage or a decrease in current when sending the identification request signal, and outputs a high pulse. This pulse passes through contact b ₂ and sets flip-flops 9 ₁ and 9 ₂ , puts relay A 11 and relay C 12 inactive, and returns the multi-terminal control device to its initial state.

The other party is using a device other than a telephone, e.g. facsimile 2.
In this case, after the A relay is operated due to incoming call detection and the identification request signal is sent, for example, the PB signal "1" is received by the type identification signal receiver 13 as a facsimile type identification signal. As a result, the output 19 of the type identification signal receiver 13 changes from low to high, the flip-flop ₉₃ is set, and the relay D of 17 is set.
works. As a result, the contact d operates, and the activation signal generator 21 is connected to the facsimile 2 through the contacts d, b ₃ and the response detector 22. When facsimile 2 responds, response detector 22 detects a DC loop, relay B of 23 operates, and facsimile 2
is connected to the subscriber line 5 through contacts d and b ₃ , loop detector 16, and contacts b _{1 and} a, and a billing response is generated by the DC loop of facsimile 2, and a signal such as documents is sent from the originating facsimile. When the communication ends and the facsimile 2 receives an end signal from the originating facsimile and opens the loop, the output of the loop detector 16 causes the flip-flop 9 to
₁ , ₉₂ , ₉₃ , and ₉₅ are reset, relays 11 A, 12 relays C, 23 relays B, and 17 relays D become inoperative, and the multi-terminal control device 4 enters its initial state. If the caller abandons the call, use phone 1.
It works exactly as described in .

When an incoming call is made to the keyboard printer 3, the operation is the same as in the case of the facsimile 2, except that the E relay 18 operates instead of the D relay 17.

The above describes the operation when the multi-terminal control device 4 accommodates a telephone 1, a facsimile 2, and a keyboard printer 3. However, when another type of terminal is connected, relays, flip-flops, calling By adding a detector, it is possible to make and receive calls in exactly the same way. Also, a type identification signal, for example, PB signal "0" is assigned to the telephone set 1 housed in the multiple terminal control device 4, and a type identification signal transmitter 33 sends a telephone set to this subscriber line using a switch memory or the like. The number is sent after the type identification signal, and when the receiving side receives this, it is possible to send and receive calling party number information in two-way communication between the multiple terminal control device 4, and a calling party number display function is added. can.

The main components in this embodiment are configured, for example, as follows.

The call detectors 35 ₁ , 35 ₂ , 35 ₃ are, for example, a relay coil and a battery connected in series, or a photo coupler (such as a NEC PC).
A detector is used that connects a light emitting diode (such as 2001B), a battery, and a resistor in series, and detects a DC loop between relay contacts or by turning on a FET transistor to detect a call.

The loop detector 31 includes, for example, a light-emitting diode of a photocoupler (for example, NEC PC 2001B, etc.) inserted in series in the loop, detects the loop current by turning on and off the phototransistor, and detects the change of the phototransistor from on to off. Then, a detector is applied that starts a timer and outputs a pulse of about 1 ms.

The identification request signal transmitter 14 uses a signal of 300 bit/sec or
1200bit/sec modem (for example, Oki Electric 1200M-
1-F modem, etc.), and the output of a sine wave oscillator such as a Vienna Bridge oscillator circuit is intermittent with a CMOS analog gate or the like as a tone signal in the voice band. As the identification request signal, two sets of sine wave oscillators such as Wien Bridge oscillators are used to generate 400Hz and 16Hz sine waves, and a general amplitude modulator using transistors etc.
We use a circuit that modulates 400Hz at 16Hz, passes this signal through a CMOS analog gate, etc., and uses an oscillator circuit such as an inverter, capacitor, and resistor to intermittent the output of the oscillator, which is high for 1 second and low for 2 seconds. . The identification request signal receiver 32 uses 300 bit/sec or
A 1200 bit/sec modem receiver, or a tone receiver consisting of a filter, limiter, and rectifier circuit, or a 400Hz tone detector consisting of a 400Hz filter, limiter, and rectifier circuit, and a 400Hz tone detector consisting of a 400Hz filter, limiter, and rectifier circuit, and a tone receiver that operates for about 0.8 seconds when a tone is detected. A timer, an approximately 0.4-second timer that starts operating when the approximately 0.8-second timer has finished operating, and a flip-flop that remembers that the tone detection output was cut off while the approximately 0.8-second timer was operating.
A flip-flop that remembers that the tone detection output is turned off while the 0.4 second timer is running, and the combined output of these two flip-flops, approximately 0.8
A gate circuit for generating an output when the tone detection output is not cut off while the second timer is operating and the tone detection output is cut off while the approximately 0.4 second timer is running, and the tone detection output is cut off. It consists of a timer circuit that resets the flip-flop after about 0.1 seconds, and uses a circuit that detects the presence of a 400Hz signal for about 1 second. The starting signal generator 21 is a 16Hz signal generator made of a Wien Bridge oscillation circuit, for example.
A sine wave oscillator, an oscillator that generates a 1 second on, 2 second off signal consisting of an inverter, a capacitor, and a resistor, a CMOS analog gate that turns on and off the 16 Hz sine wave using this signal, and a CMOS analog gate that outputs approximately 70 V.
It can be configured with an amplifier that amplifies the signal. Response detector (2
2) For example, connect the coil and battery of a relay in series, or connect the light-emitting diode side of a photo cutter (for example, NEC PC2001B, etc.) in parallel with an AC bypass capacitor, and connect the battery and resistor in series. A device is applied that detects a DC loop by connecting a relay contact or turning on a phototransistor. The partner abandonment detector 14 uses, for example, the output voltage or output current of an identification request signal transmitter, which is rectified by a diode or the like and smoothed by a capacitor, and the output voltage of a rectifier circuit, and when the load of the identification request signal transmitter is approximately 600Ω. A voltage comparator circuit compares a reference voltage set in advance according to the output voltage of the rectifier circuit, and determines that the end of the subscriber line 4 is open based on whether the output of the rectifier circuit is higher or lower than the reference voltage. A detector that detects and outputs is applied.

Effects of the Invention As explained above, by applying the multiple terminal control device to the existing telephone switching network, multiple terminals can be controlled without modifying the existing telephone switching network or without changing the conventional billing system. Compared to the case of switching between multiple terminals such as a telephone and a facsimile, there is no need for someone to answer a facsimile call, and it is also possible to receive a call even when the user is not present. , it is possible to improve the sophistication of services and make effective use of subscriber lines.

[Brief explanation of the drawing]

FIG. 1 is an example of the application of the present invention to a telephone network, and FIG. 2 is an internal configuration diagram of an embodiment of a multiple terminal control device according to the present invention. 1... Telephone, 2... Facsimile, 3... Keyboard printer, 4... Multiple terminal control device, 5
...Subscriber line, 6...Switchboard, 7...Relay network, 8
... Incoming call detector, 9 ₁ to 9 ₉ ... Flip-flop, 10 ... Timer, 11 ... Relay A, 12 ...
... Relay C, 13 ... Type identification signal receiver, 14
...Identification request signal transmitter/partner abandonment detector,
15...Non-charge response device, 16...Loop detector, 17...Relay D, 18...Relay E, 1
9, 20... Output of type identification signal receiver, 21...
...Start signal generator, 22...Response detector, 23...
...Relay B, 24 ₁ to 24 ₃ ...And gate, 2
5... Relay I, 26... Relay H, 27... Relay G, 28... Relay F, 29... Selection signal transmitter, 30... Reverse detector, 31... Loop detector, 32... Identification Request signal receiver, 33...
Type identification signal transmitter, 34... Dial switch, 35 ₁ to 35 ₃ ... Call detector, 36 ₁ to 35 ₄
...Orgate, 37...Incoming call lamp, 38...
Other party response lamp.

Claims (1)

[Scope of Claims] 1. Multiple terminal control that accommodates a plurality of different types of subscriber terminals and subscriber lines, including telephones, in the subscriber hierarchy of a telephone exchange network, and controls incoming and outgoing calls from the subscriber terminals. In the device, the outgoing connection control of the subscriber terminal is performed based on the logic between the output of the call detector corresponding to each of the subscriber terminals and the output of the incoming call detector that detects whether the pair of subscriber lines is empty or blocked. and a call detection unit that detects calls from the calling non-telephone subscriber terminal to the called party in response to a type request signal from the called party in the outgoing connection between the different types of non-telephone subscriber terminals. Calling a non-telephone subscriber terminal that controls outgoing connection from the non-telephone subscriber terminal based on the logic of the output of a type identification signal transmitter that sends out a type identification signal and the DC reverse signal from the exchange in response to a response from the called party. In the connection control unit and the incoming call to the subscriber terminal, the transmission path with the other party's calling terminal is set by a non-charging response, and the calling party is determined by the presence or absence of a type identification signal from the other party's calling terminal. A non-charging response unit that identifies whether a terminal is a non-telephone type or a telephone type and controls connection with the respective corresponding called subscriber terminals, and an incoming call to each of the different types of non-telephone type subscriber terminals. In the connection, an activation signal generator is activated by inputting a response signal from a corresponding non-telephone subscriber terminal on the called side using the output of a type identification signal receiver that receives a type identification signal from the called side terminal. The output gives
comprising a non-telephone subscriber terminal incoming call connection control unit that controls incoming call connection to the non-telephone subscriber terminal, and each connection control operation is configured by a combination circuit of a logic element, a binary state element, and a switching element. A multiple terminal control device characterized by: