JPS6321385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a subscriber hierarchy of a telephone exchange network, in which a plurality of subscriber lines or a pair of subscriber lines are combined into a representative number, and a plurality of subscriber lines of different types including telephone sets. The present invention relates to a multiple terminal control device accommodating subscriber terminals.

Background of the Technology In the telephone exchange network, terminals such as facsimile and teletype machines that have an automatic call receiving function do not require any human intervention when receiving calls, so they can be used in a variety of new ways, such as communication during absences. However, since such communication between non-telephone terminals can only be carried out between terminals of the same type, it is necessary that the terminals on the calling and receiving sides be of the same type. For this reason, a terminal switching control device (for example, Japanese Patent Application No. 55-042675) has been proposed.
When a call is received, the phone first receives the call, and if the phone does not answer within a certain period of time, another terminal, such as a stroke drawing terminal, automatically answers, and a signal indicating that the stroke drawing terminal has responded is sent and received. This is a method of communicating by confirming each other's terminal types.

Prior Art and Problems In the conventional terminal switching control device, the selection of an incoming call to a telephone or a drawing terminal, etc. is determined based on whether the telephone responds within a certain period of time after receiving the call. Even when a call is received to a calligraphy terminal, etc., which does not normally need to be answered, a person must pick up the receiver and use an audible sound to determine whether the caller is a person or a calligraphy terminal, making the operation complicated. . In addition, when calling this terminal switching control device from a general telephone, if the person is absent or there is a delay in answering the call, a calligraphy terminal, etc. will respond, an audible signal will be sent, and charges will be charged. may give undesirable responses to others.

Purpose of the Invention In order to eliminate these drawbacks, the present invention provides a non-charge-free response (which closes the loop without charge, and is used for toll-free trunks such as 104) and a terminal type identification signal. The feature is that after identifying the called terminal by sending/receiving or the absence of a terminal type signal, a charging response is made on the called side, and its purpose is to automatically select multiple types of terminals without modifying the existing exchange network. It is to realize the incoming call.

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 terminal, 2 is a terminal other than the telephone, such as a facsimile,
3 is a multi-terminal control device according to the present invention, 4 and 5 are subscriber lines connected to a representative number, 6 is an exchange, and 7 is a relay network. A multi-terminal control device 3 according to the present invention is installed between the subscriber lines 4 and 5 inside the premises, the telephone terminal 1, and the facsimile machine 2, and controls incoming and outgoing calls from each terminal.

FIG. 2 shows an example of the internal configuration of the multi-terminal control device 3 according to the present invention, where 71 is an incoming call detector whose input is connected to the subscriber line 4 through contact a, and whose output 72 is the I/O port 20. connected to. 73 is a timer whose input is connected to the output 72 of the incoming call detector 71 and whose output 8 is connected to the I/O port 20. Reference numeral 9 denotes an identification request signal transmitter and a partner abandonment detector, which are connected to the subscriber line 4 through contacts b and a, and an output 10 of the partner abandonment detector 9 is connected to an I/O port 20.

Reference numeral 11 denotes a billing response device, which is connected to the subscriber line 4 through contacts b and a. 12 is an identification request signal receiver, the input of which is connected to the subscriber line 4 through contacts c and a.
, its output 13 is connected to I/O port 20 . 14 is a type identification signal receiver, the input of which is connected to the subscriber line 4 through contacts c and a, and the reception output 15,
16 is connected to the I/O port 20. 17 is a type identification signal transmitter whose output is connected to subscriber line 4 through contacts c and a, and transmission inputs 18 and 19 are connected to I/O port 20. 21 is a loop detector,
Subscriber line 4 or contact through contacts d ₂ , d ₁ , a
to the subscriber line 5 through d ₂ , d ₃ , g and also to the contact points e,
is connected to the telephone terminal 1 through f, and its output 22
is connected to the I/O port 20. 23 is a call detector whose input is connected to the telephone terminal 1 through contacts e and f, and whose output 24 is connected to the I/O port 20. 25 is a start signal generator, and response detector 2
6. Connected to the telephone terminal 1 through contact f. Output 27 of response detector 26 is connected to I/O port 20 . 28 is an incoming call detector, the input of which is connected to the subscriber line 5 through contact g, and the output 29
is connected to the I/O port 43. 30 is a timer whose input is the output 29 of the incoming call detector 28 and the output 3
1 is connected to the I/O port 43. Reference numeral 32 denotes an identification request signal transmitter and a partner abandonment detector, which are connected to the subscriber line 5 through contacts h and g, and an output 33 of the partner abandonment detector 32 is connected to the I/O port 43.
connected to. Reference numeral 34 denotes a non-charge answering device used in a toll-free trunk such as number 104, and is connected to the subscriber line 5 through contacts h and g. 35 is an identification request signal receiver whose input is connected to the subscriber line 5 through contacts i and g, and whose output 36 is connected to the I/O port 43. 37 is a type identification signal receiver, the input of which is connected to the subscriber line 5 through contacts i and g.
In addition, the receive outputs 38 and 39 are connected to the I/O port 43. 40 is a type identification signal transmitter whose output is connected to subscriber line 5 through contacts i and g, and transmission inputs 41 and 42 are connected to I/O port 43. 4
4 is a loop detector which connects to the subscriber line 5 through contacts d ₄ , d ₃ , and g, or to the subscriber line 4 through contacts d ₄ , d ₁ , and a, and a reverse detector 46 and contacts j, k.
is connected to facsimile 2 through its output 4
5 is connected to the I/O port 43. An output 47 of the reverse detector 46 is connected to a partner response lamp 68. 48 is a call detector whose input is connected to the facsimile 2 through contacts j and k, and its output 49
is connected to the I/O port 43. Reference numeral 50 denotes a starting signal generator, which is connected to the facsimile 2 through a response detector 51 and a contact k. The output of response detector 51 is connected to I/O port 43. 53 is a microprocessor (hereinafter abbreviated as CPU) that controls this system, and connects a random access memory (RAM) 54 through a bus, a read-only memory 55 that stores control programs, and an I/O that performs input/output. Connected to ports 20 and 43. 56 to 65 are I/O with relays A to J, respectively.
It is connected to port 43. 66 is a selection signal generator connected to the dial 67, and outputs from contacts d ₄ , d ₃ ,
It is connected to the subscriber line 5 through g or to the subscriber line 4 through contacts d ₄ , d ₁ and a. 70 is resistance 69
59 is connected to the I/O port 43 with the active status input line of the D relay 59, which is connected to the +5V power supply through the terminal d5 and to ground through the contact _d5 . 74 is a buzzer whose input is connected to the I/O port 43. 75
is connected to the I/O port 43 by a changeover switch. 76 is a DC holding circuit connected to the subscriber line 5 through contacts l, d ₄ , d ₃ and g, or to the subscriber line 4 through contacts l, d ₄ , d ₁ and a. 77 and 78 are connected to the I/O port 43 through relays L and K. 7
A busy lamp 9 is connected to the I/O port 43. 80 is a subscriber line support section, and 81 is a terminal support section.

Incoming calls to the telephone terminal 1 will be explained with reference to FIG. When the telephone terminal 1 is idle and there is an incoming call on the subscriber line 4, the incoming call detector 71 detects DC inversion or
A 16 Hz ringing signal is detected, and output 72 is inverted from low to high, operating timer 73 for about 3 seconds.
The CPU 53 detects through the I/O port 20 that the output 72 of the incoming call detector 71 has changed from low to high, and
8 relay C is operated via I/O port 43. By the operation of contacts a, b, and c, subscriber line 4
is connected to the identification request signal transmitter 9, the partner abandonment detector 9, and the non-charging response device 11 through contacts a and b. Non-charging response device 11 is number 100, 104
It is used as a trunk for receiving calls toll-free, such as numbers 105 and 105, and uses the same principle as that known for magic telephones, etc., and does not return DC reverse, allowing calls to be made while stopping billing at exchange 6. This is to set up a transmission path. This makes it possible to communicate with the other party without charge, so that the output of the identification request signal transmitter 9 reaches the calling party. The identification request signal transmitter 9 is a signal that requests the calling side to send a type identification signal, and can use various signals within the voice band as the signal. For example 1750±100Hz,
300bit/sec or 1750±400Hz, 1200bit/sec
It is also possible to send a specific code, such as ENQ, using an FS signal such as
You may also send a 1750Hz/sec tone, etc. These are determined to be transmitted for a certain period of time at a certain period, for example, for one second every three seconds, 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 simultaneously. In particular, if we use 400Hz amplitude-modulated at 16Hz as this identification request signal and send this for 1 second every 3 seconds, this will be the same signal as the ringback tone sent from the exchange while the other party is calling. Therefore, when a call is made from an ordinary telephone to this multi-terminal control device, the state is the same as when a call is made to an ordinary telephone, and there is an advantage that the caller does not feel strange.

The subscriber line 4 is connected to an identification request signal receiver 12, a type identification signal receiver 14, and a type identification signal transmitter 17 through contacts a and c. When a call is made from the telephone, no type identification signal is sent, and a pulse is output to the output 8 of the timer 73 approximately 3 seconds after the incoming call is detected, and the CPU 53 is sent to the CPU 53 through the I/O port 20.
is detected. Since the type identification signal was not received, the CPU 53 determines that the call is for a telephone, sets relay C of 58 to an inactive state, and
Identification request signal receiver 12, type identification signal receiver 1
4. Disconnect the type identification signal transmitter 17. Next, the state of relay D 59 is checked through the input line 70 connected to contact d ₅ , and if the input line 70 is high, it remains as is, and if it is low, relay D 59 is inactivated and subscriber line 4 is Set it so that it is on the side of telephone terminal 1. Next, the relay F of 61 is activated, and a calling signal is sent from the start signal generator 25 to the telephone terminal 1 through the response detector 26 and the contact f at 16 Hz and for 1 second every 3 seconds. Telephone terminal 1 is taken off-hook,
When a response is received, the response detector 26 detects that a DC loop is formed, and its output 27 changes from low to high, which is detected by the CPU 53. CPU53 disables relay F of 61, operates relay E of 60, and operates relay F of 61, 57
B relay is made inactive, and the fact that the telephone terminal 1 is in use is stored in the RAM 54.

Subscriber line 4 has contacts a, d ₁ , d ₂ and loop detector 2
1, it is connected to the telephone terminal 1 through contacts a and f.
The direct current loop of the telephone terminal 1 sends a billing response to the exchange 6, and billing starts, allowing a conversation with the calling party. When the call ends and you turn off the handset of telephone terminal 1, the loop current will start from about 50 to 20 mA.
The loop detector 21 detects this and its output 22 changes from low to high. CPU
53 considers this to be the end of the conversation, and relay A of 56,
60 is made inactive, the fact that the telephone terminal is not in use is stored in the RAM 54, and the multiple terminal control device 3 returns to its initial state.

Further, when the caller disconnects while the telephone terminal 1 is ringing, that is, before the telephone terminal 1 responds, the end of the subscriber line 4 becomes open, and the output voltage of the identification request signal transmitter 9 increases and the output current decreases. This is detected by the partner abandonment detector 9, and its output 10 changes from low to high. The CPU 53 detects this and
6 relay A, 57 relay B, 61 relay F
is rendered inoperable and the composite terminal control device 3 is returned to its initial state.

Next, a case will be described in which a call is received from a telephone on the subscriber line 5 while the telephone terminal 1 is talking through the subscriber line 4, the contacts a, d ₁ , d ₂ , the loop detector 21, and the contacts e, f.

When there is an incoming call to the telephone terminal 1 on the subscriber line 5, the incoming call detector 28 detects the incoming call and relays G, 62
Relay H of 3 and relay I of 64 are operated until the output 31 of the timer 30 changes to high and the CPU 53 detects that the call is incoming to the telephone terminal 1.
The procedure for receiving a call to the subscriber line 4 described above is the same.
After that, when the CPU 53 identifies that the telephone terminal 1 is in a call based on the information in the RAM 54, the I/O
A buzzer 74 is sounded through the O port 43 to notify the user that there is an incoming call. When the user presses the switch 75, the CPU 53 changes to 77.
relay L and relay D of 59 are operated, and the telephone terminal 1 is connected to contacts f, e, loop detector 21, contact d ₂ ,
It is connected to the subscriber line 5 through d ₃ and g. As a result, a billing response is made to the subscriber line 5 using the DC loop of the telephone terminal 1, and a call can be made to the called party to the subscriber line 5. On the other hand, due to the operation of the L relay of 77,
The DC holding circuit 76 is connected to the subscriber line 4 through contacts l, d ₄ , d ₁ , a, and the subscriber line 4 is held. When the switch 75 is pressed again, the CPU 53 disables the D relay 59 and connects the subscriber line 4 to the telephone terminal 1 and the subscriber line 5 to the DC holding circuit 76. When the handset is turned on, it is detected by the loop detection circuit 21, all relays are made inactive, and the multi-terminal control device 3 returns to its initial state.

Above, we have described the case where there is an incoming call to the subscriber line 4 and an incoming call to the subscriber line 5 while the subscriber line 4 is on the line. Even when there is an incoming call to the subscriber line 4, the same sequence operates, except that the operation and non-operation of the D relay 59 are reversed.

Next, a case will be described in which a call to the facsimile 2 is received on the subscriber line 5. When there is an incoming call on the subscriber line 5, it is detected by the incoming call detector 28, and the I/O port 4
3 is detected by the CPU 53, and a timer 30 of about 3 seconds is started. The CPU 53 operates relay G 62, relay H 63, and relay I 64, responds with non-charging response device 34, and the identification request signal transmitter 32 sends out an identification request signal. The calling side receives the identification request signal, and when the identification request signal is cut off, sends a facsimile 2 type identification signal. This signal is received by the type identification signal receiver 37 and its output 38 goes high. The CPU 53 detects this and knows that it is an incoming facsimile call.
After confirming that the facsimile is free from the memory in the RAM 54, the relay K of 78 is activated.
As a result, the activation signal generator 50 is activated by the response detector 5.
1. Activate the facsimile 2 connected to the facsimile 2 through contact k. facsimile 2
In response to this, the output 52 of the response detector 51 changes to high, and the CPU 53 detects the response from the facsimile 2, operates relay J at 65, relay H at 63,
Relay I at 64 and relay K at 78 are made inactive. Therefore, facsimile 2 has contacts k, j,
Reverse detector 46, loop detector 44, contact
It is connected to the subscriber line 5 through d ₄ , d ₃ , and g, and the DC loop of the facsimile 2 makes a billing response to the exchange 6 and allows communication. When the communication ends and the facsimile 2 disconnects the DC loop, the loop detector 44
It is detected that the DC loop current has become 0, the output 45 becomes high, the CPU 53 deactivates all relays, and the multi-terminal control device 3 returns to its initial state.

Incoming calls to the subscriber line 4 operate in the same sequence except that the operation of the D relay 59 changes. The type identification signal is a signal within the audio band, such as 1750±100Hz, 300bit/sec, or 1700±
400Hz, 1200bit/sec FS signal, tone signal, PB signal which is a pushphone dial signal, etc. can be used. For example, when using PB signal, set "1"
For example, 697Hz and 1209Hz signals mean
It is conceivable to send out 100ms and allocate this to the facsimile.

Next, a case will be described in which there is an incoming call to the facsimile 2 on the subscriber line 4 while the facsimile 2 is communicating through the subscriber line 5. A call arrives at subscriber line 4 56,
Relays A, B, and C of 57 and 58 operate in the same manner as described for receiving a call to subscriber line 5 until the output 15 of type identification signal receiver 14 becomes high when the type identification signal is received. Here CPU53 is RAM
54, it is detected that the facsimile 2 is in use, and input 1 of the type identification signal transmitter 17 is detected.
A signal indicating that the terminal is busy by sending a pulse to 941Hz, which means "#" of the PB signal, for example.
and send a signal of 147Hz, 100ms 56, 57, 5
8 relays A, B, and C are made inoperative and returned to their initial state. On the other hand, the calling side receives the PB signal "#", detects that the other party is busy, and disconnects.

If there is an incoming facsimile call to subscriber line 5 while facsimile 2 is communicating on subscriber line 5, 59
They operate according to the same procedure except that the operating state of relay D is different.

Further, the case where a call is received to the facsimile 2 while the telephone terminal 1 is in use, or the case where a call is received to the telephone terminal 1 while the facsimile 2 is in use is exactly the same as the case of an incoming call when both lines are idle, as described above.

Next, a call from the telephone terminal 1 will be explained.
When the telephone terminal 1 is taken off-hook, the call detector 23 detects the formation of a DC loop through the contacts f and e, and the output 24 becomes high, which is detected by the CPU 53. The CPU 53 operates the relay A 56, the relay G 62, and the relay E 60 according to the operating state of the relay D 59, and stores in the RAM 54 that the telephone terminal 1 is in use. Thereby, the telephone terminal 1 is connected to the subscriber line 4 or 5 through the contacts f, e, the loop detector 21, and the contacts d ₂ , d ₁ or d ₂ , d ₃ , g. A dial tone is issued from the exchange 6, a dial signal is sent from the telephone terminal 1 to connect to the other party, a call is made, and when the call is finished and the call is turned off, the loop detector 21 detects a break in the DC loop, and the CPU 53 detects this. The operating relays are made inactive and the multiple terminal control device 3 returns to its initial state.

Next, transmission from facsimile 2 will be explained. When the facsimile 2 closes the DC loop, it is detected by the call detector 48 through contacts k and j,
Detected by CPU 53, CPU 53 relays 64 relay I or 58 relay C, 65 relay J, 56
62 relay A or 62 relay G is operated.
As a result, the facsimile 2 has contacts k, j, reverse detector 46, loop detector 44, contacts d ₄ , d ₃ ,
g, or d ₄ , d ₁ , a through subscriber line 5 or 4
connected to. Further, an identification request signal receiver 35 or 12, a type identification signal receiver 37 or 14, and a type identification signal transmitter 40 or 17 are connected to the subscriber line 5 or 4 through contacts i and g. Next, the case where a call is made from the subscriber line 5 will be explained. After the facsimile 2 is connected to the exchange 6 through the subscriber line 5, the dial 67 is operated and the selection signal generator 66 sends the telephone number of the other party to the exchange 6. When a connected identification request signal is sent from the called party, it is received by the identification request signal receiver 35 and the output 36 goes high. The CPU 53 detects this high signal, and when the identification request signal is cut off and the output 36 becomes low, the input 41 of the type identification signal transmitter 40
A pulse is output through the I/O port 43, and a type identification signal indicating facsimile 2, for example, a PB signal "1" is sent out. When the facsimile 2 on the called side responds to this, a DC reverse signal is sent from the exchange 6, detected by the reverse detector 46, and the callee response lamp 68 lights up. By seeing this and operating the facsimile 2, it communicates with the facsimile on the called side, and when the communication is finished, the DC loop of the facsimile 2 is opened, and the loop detector 44 detects that the loop is open, and the output 45 This is detected by the CPU 53, which deactivates all relays, and the multiple terminal control device 3 returns to its initial state.

In the above description, when the type identification signal indicating facsimile 2, for example, the PB signal, sends "1",
If the facsimile on the called side is in use, a signal indicating busy, such as a PB signal "#", is sent from the called side. The signal is transmitted to the type identification signal receiver 37
and a pulse is output at its output 39. The CPU 53 detects the pulse, deactivates all relays, sets the multiple terminal control device 3 to the initial state, lights up the busy lamp 79 for a certain period of time via the I/O port 43, and receives a call to the operator. Indicates that the side fax machine is busy.

The configuration and operation of the multiple terminal control device 3 with two subscriber lines and two types of terminals have been explained above.
m subscriber lines (m≧3), n types of terminals (n≧3),
In the case of 3), if you change the relay D of 59 to an m×n crossbar switch or the like, and make the subscriber line corresponding section 80 in FIG. 2 m pieces and the terminal corresponding section 81 part in n pieces , the control procedure can be realized in the same manner as described above.

Note that each component described above is implemented, for example, in the following specific example. identification request signal transmitter 9;
In 32, it is used in general data communication as a signal requesting the calling side to send a type identification signal.
The transmitting section of a 300 bit/sec or 1200 bit/sec modem (for example, Oki Electric 1200M-1-F modem, etc.) is used, and the output of a sine wave oscillator such as a Vienna Bridge oscillator circuit is used as the voice band tone signal.
The signal is intermittent with an analog gate, etc., and as the identification request signal, two sets of sine wave oscillators such as Wien Bridge oscillator circuits are used to generate 400Hz and 16Hz sine waves.
400Hz is modulated at 16Hz using a general amplitude modulator that uses transistors, etc., and this signal is sent to an inverter, capacitor, etc. via a CMOS analog gate, etc.
An oscillator circuit such as a resistor that uses an intermittent oscillator output that is high for 1 second and low for 2 seconds is used. The response detectors 26 and 51 are, for example, a series connection of an AC silent relay coil and a battery, or a photocoupler (for example, made by NEC Corporation).
A device that connects the light emitting diode side of a PC2001B (such as PC2001B) in parallel with an AC bypass capacitor, a battery and a resistor in series, and detects a DC loop by closing a relay contact or turning on a phototransistor is applied. The loop detectors 21 and 44 are
For example, Photokatsupla (for example, made by NEC Corporation)
A light emitting diode (PC2001B, etc.) is inserted in series in the loop, and the loop current is detected by turning on and off the phototransistor.When the phototransistor changes from on to off, a timer is started and the timer is activated.
A detector that outputs a pulse of approximately 1 ms is applied. The partner abandonment detectors 9, 32, for example, rectify the output voltage or output current of the identification request signal transmitters 9, 32 using a diode or the like and smooth the rectifier circuit output voltage using a capacitor, and the identification request signal transmitters 9, 32. A voltage comparator circuit compares the output voltage of the rectifier circuit with a reference voltage preset according to the output voltage of the rectifier circuit when the load is approximately 600Ω. A detector is applied that detects and outputs that the is open. The DC holding circuit 70 is
For example, a relay coil or a circuit that obtains a DC resistance of about 200Ω using a resistor is used. Type identification signal transmitters 17, 40 and receivers 14, 37
is used for general data communication.
Transmission in which the output of a 300 bit/sec or 1200 bit/sec modem (e.g. Oki Electric 1200M-1-F modem, etc.) or a sine wave oscillator using a Vienna Bridge oscillation circuit is intermittent with a CMOS analog gate. A tone receiver consisting of a filter, limiter, and rectifier circuit, or a PB oscillator used for dial oscillation of a pushphone (for example, NEC's μPC757C, Fujitsu's PB oscillator)
(consisting of an IC such as MB4507A, a capacitor, a resistor, a crystal, etc.) and a PB receiver (for example, Silicon Systems' 1-chip PB receiver SSI201, etc.) are used. The identification request signal receivers 12 and 35 are 300 bit/300 bits used for general data communication.
sec or 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 that operates when a tone is detected. Second timer and approx.
An approximately 0.4 second timer that starts operating when the 0.8 second timer ends, a flip-flop that remembers that the tone detection output has been cut off while the approximately 0.8 second timer is operating, and a flip-flop that remembers that the tone detection output has been cut off while the approximately 0.8 second timer is operating. There is a flip-flop that remembers when the tone detection output has cut off, and the outputs of these two flip-flops are combined to ensure that the tone detection output does not cut off while the approximately 0.8 second timer is operating, and the approximately 0.4 second timer is operating. It consists of a gate circuit that generates an output when the tone detection output is cut off, and a timer circuit that resets the flip-flop after about 0.1 seconds after the tone detection output is cut off. Use a detection circuit. The starting signal generators 25 and 50 include, for example, a 16Hz sine wave oscillator made of a Vienna Bridge oscillator circuit, an inverter, a capacitor, and a resistor, which generate a signal of 1 second on and 2 seconds off, and a 16Hz oscillator with this signal.
It can be configured with a CMOS analog gate that turns on and off the sine wave, and an amplifier that amplifies this output to about 70V. The call detectors 23 and 48 are, for example, a relay coil and a battery connected in series, or a photo-coupler (for example, NEC PC2001B, etc.).
A detector is used that connects the light emitting diode side of the device, a battery, and a resistor in series, and detects a DC loop between relay contacts or by turning on a phototransistor to detect a call.

Although the embodiment has been described above in which a plurality of subscriber lines organized into a representative number are accommodated, the present invention can be similarly applied to the case of a pair of subscriber lines. FIG. 3 is a diagram showing the configuration of an embodiment in which the present invention is applied to a pair of subscriber lines. The same symbols as in FIG. 2 indicate the same parts. A relay M 82 corresponds to the relay D 59 in FIG. 2 and is connected to the I/O port 43. The contact _m1 connects the subscriber line 4 through contact a,
Telephone terminal 1 via loop detector 21 and contacts e and f
or loop detector 44, reverse detector 4
6. Switch connection to facsimile 2 via contacts j and k. Contact m ₂ of relay A 82 is for transmitting the operating state of relay M to the CPU, and has the same function as contact d ₅ in FIG.

Incoming calls to the telephone terminal 1 will be explained with reference to FIG. When the telephone terminal 1 is idle and there is an incoming call on the subscriber line 4, the incoming call detector 71 detects a DC inversion or a 16Hz ringing signal, the output 72 is inverted from low to high, and a timer of approximately 3 seconds is activated. Operate 73. The CPU 53 informs the I/O port 20 that the output 72 of the incoming call detector 71 has changed from low to high.
56 relay A, 57 relay B, and 58 relay C are activated via I/O port 43 to detect that subscriber line 4 is in use.
Store in RAM54. By the operation of contacts a, b, and c, subscriber line 4 is connected to identification request signal transmitter 9, callee abandonment detector 9, and non-charging response device 11 through contacts a, b. Non-charging response device 1
1 is used as a toll-free trunk for incoming calls to numbers 100, 104, 105, etc. It also uses the same principle as that known for magic telephones, etc., and does not return DC reverse, and is used as a trunk for receiving calls to numbers 100, 104, 105, etc. This allows you to set up a transmission route with the other party while stopping billing.
This allows communication with the other party without charge, so the output of the identification request signal transmitter 9 reaches the calling party. An identification request signal transmitter 9 sends a signal requesting the calling side to send a type identification signal, and various signals within the voice band can be used as the signal. For example, 1750±100Hz, 300bit/
sec or 1750±400Hz, 1200 bit/sec, etc., a specific code such as ENQ may be sent, or a voice band tone signal such as a 1750Hz 1 second tone may be sent. These are determined to be transmitted for a certain period of time at a certain period, for example, for one second every three seconds, 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. In particular, if this identification request signal transmitter 9 is to transmit a 400 Hz amplitude modulated signal at 16 Hz for 1 second every 3 seconds as an identification request signal, this is the same as the ring back tone sent from the exchange while the other party is calling. Since the signals are the same, calls made to this multi-terminal control device 3 from a general telephone are also
It will be in the same state as when calling a regular phone,
This has the advantage of not making the caller feel uncomfortable.

The subscriber line 4 is connected to an identification request signal receiver 12, a type identification signal receiver 14, and a type identification signal transmitter 17 through contacts a and c. When a call is made from the telephone, no type identification signal is sent, and a pulse is output to the output 8 of the timer 73 approximately 3 seconds after the incoming call is detected, and is detected by the CPU 53 through the I/O port 20. Since the type identification signal is not received, the CPU 53 determines that the incoming call is for a telephone, sets the relay C of 58 to an inoperable state, and sets the identification request signal receiver 12, the type identification signal receiver 14,
The type identification signal transmitter 17 is disconnected. Next is the contact
The status of relay M is checked through the information line 70 connected to _m2 , and if the information line 70 is high, it remains as is; if it is low, relay M is inactive, and subscriber line 4 becomes the telephone terminal 1 side. do it like this. Next 6
Relay F of No. 1 is activated, and start signal generator No. 2 is activated.
5 sends a calling signal to the telephone terminal 1 through the response detector 26 and the contact f at 16 Hz with a 3-second cycle of 1 second. When the telephone terminal 1 is taken off-hook and responds, the response detector 26 detects that a DC loop has been formed, and its output 27 changes from low to high and the CPU
Detected at 53. CPU53 is 61 relay F
is inactive, the E relay 60 is activated, the B relay 57 is inactive, and the fact that the telephone terminal 1 is in use is stored in the RAM 54.

The subscriber line 4 has contacts a and m ₁ , a loop detector 21,
Contacts e and f are connected to the telephone terminal 1. The DC loop of the telephone terminal 1 sends a billing response to the exchange 6, billing is started, and a conversation can be made with the calling party.
When the call ends and you turn off the handset of telephone terminal 1, the loop current changes from about 50 to 20 mA to 0 mA.
The loop detector 21 detects this and its output 22 changes from low to high. The CPU 53 considers this to be the end of the call, and relays A and 60 of 56
makes relay E inoperative, stores in RAM 54 that subscriber line 4 and telephone terminal 1 are free,
The multiple terminal control device 3 returns to its initial state.

Also, if the telephone terminal 1 is calling, that is, the telephone terminal 1
If the caller disconnects before responding, the end of the subscriber line 4 becomes open, and the output voltage of the identification request signal transmitter 9 increases and the output current decreases. This is detected by the partner abandonment detector 9, and its output 10 changes from low to high. The CPU 53 detects this and
Relay A 56, relay B 57, and relay F 61 are made inactive, the fact that telephone terminal 1 and subscriber line 4 are vacant is stored in RAM 54, and composite terminal control device 3 is returned to its initial state.

Next, a case will be described in which a call to the facsimile 2 is received on the subscriber line 4. When an incoming call is received on the subscriber line 4, it is detected by the incoming call detector 71, and is detected by the CPU 53 through the I/O port 20, and a timer 73 of about 3 seconds is activated. CPU is 56 relay A,
57 relay B and 58 relay C are operated, the fact that the subscriber line 4 is in use is stored in the RAM 54, the non-charging response device 11 responds, and the identification request signal transmitter 9 sends an identification request signal. Ru. The calling side receives the identification request signal, and when the identification request signal is cut off, sends a facsimile 2 type identification signal. This signal is received by the type identification signal receiver 14, whose output 15 goes high. The CPU 53 detects this and
I realized that it was a call to FAX 2, so I switched to RAM.
It is confirmed from the memory 54 that the facsimile 2 is empty, and the relay K 78 is activated. As a result, the activation signal generator 50 is connected to the facsimile 2 through the response detector 51 and the contact k, and activates the facsimile 2. When the facsimile 2 responds, the output 52 of the response detector 51 changes to high.
The CPU 53 detects the response from facsimile 2 and
The relay J of 5 is activated, the relay H of 63, the relay I of 64, and the relay K of 78 are deactivated, and the fact that the facsimile 2 is in use is stored in the RAM 54. Therefore, facsimile 2 has contacts k, j,
Reverse detector 46, loop detector 44, contact
It is connected to the subscriber line 4 through m ₁ and a, and the DC loop of the facsimile 2 makes a billing response to the exchange 6, allowing communication. When the communication ends and the facsimile 2 disconnects the DC loop, the loop detector 44 detects that the DC loop current has become 0, its output 45 goes high, and the CPU 53 disables all relays and disconnects the subscriber line. 4 and facsimile 2 are vacant, is stored in the RAM 54, and the multiple terminal control device 3 returns to its initial state.

As the type identification signal, signals within the audio band can be used, such as FS signals of 1750±100Hz, 300bit/sec, or 1700±400Hz, 1200bit/sec, tone signals, and pushphone dial signals.
PB signals etc. can be used. For example, when using a PB signal, it is conceivable to send 697 Hz and 1209 Hz signals representing "1" for 100 ms and allocate these to a facsimile.

Next, a call from the telephone terminal 1 will be explained.
When the telephone terminal 1 is taken off-hook, the call detector 23 detects the formation of a DC loop through the contacts f and e, and the output 24 becomes high, which is detected by the CPU 53. The CPU 53 confirms from the memory of the RAM 54 that the subscriber line 4 is free, deactivates the relay M of 82, operates the relay A of 56 and the relay E of 60, and stores the subscriber line 4 and the telephone terminal 1 in the RAM 54. Remember that it is in use. As a result, the telephone terminal 1 has contacts f, e, loop detector 21,
It is connected to the subscriber line 4 through contacts m ₁ and a.
A dial tone is sent from the exchange 6, a dial signal is sent from the telephone terminal 1, a connection is made to the other party, a call is made, and when the call is completed and the call is turned on, the loop detector 21 detects a break in the DC loop, and the CPU 53 detects this. The relay is made inactive, the fact that the subscriber line 4 and the telephone terminal 1 are vacant is stored in the RAM 54, and the multiple terminal control device 3 returns to its initial state.

Next, transmission from facsimile 2 will be explained. When the facsimile 2 closes the DC loop, it is detected by the call detector 48 through contacts k and j,
It is detected by the CPU 53, and the CPU 53 confirms from the memory of the RAM 54 that the subscriber line 4 is free.
CPU53 has 58 relays C, 65 relays J,
56 and stores in RAM 54 that subscriber line 4 and facsimile 2 are in use. As a result, facsimile 2 has contact point k,
j, a reverse detector 46, a loop detector 44, and contacts m ₁ and a, which are connected to the subscriber line 4. Further, an identification request signal receiver 12, a type identification signal receiver 14, and a type identification signal transmitter 17 are connected to the subscriber line 4 through contacts a and b. After the facsimile 2 is connected to the exchange 6 through the subscriber line 4, the dial 67 is operated and the selection signal generator 66 sends the telephone number of the other party to the exchange 6. When the called party is connected and an identification request signal is sent from the called party, the output 13 received by the identification request signal receiver 12 becomes high. The CPU 53 detects this high signal, outputs a pulse to the input 18 of the type identification signal transmitter 17 through the I/O port 20 when the identification request signal is cut off and the output 13 becomes low, and outputs a pulse to indicate the type of facsimile. An identification signal, for example, a PB signal "1" is transmitted. On the other hand, when the facsimile on the called side responds, a DC reverse signal is sent from the exchange 6, detected by the reverse detector 46, and the callee response lamp 68 lights up. Seeing this, the facsimile machine 2 is operated to communicate with the called facsimile machine, and when the communication is completed, the DC loop of the facsimile machine 2 is opened, and the loop detector 44 detects that the loop is open. Detected by the CPU 53, the CPU 53 disables all relays and stores in the RAM 54 that the subscriber line 4 and facsimile 2 are free, and the multiple terminal control device 3 returns to its initial state.

The configuration and operation of the multiple terminal control device 3 with one subscriber line and two types of terminals have been explained above.
In the case of terminal type n (n3), the relay M at 59 should be a multi-contact rotary relay, or the number of relays M at 59 should be increased, and the terminal support section 81 in FIG.
If the number of parts is set to n-1, the control procedure can be realized in the same manner as described above. Furthermore, although this multiple terminal control device has been described as being installed on the subscriber side of the subscriber line, it goes without saying that it will operate in exactly the same way even if it is installed on the exchange side of the subscriber line.

Effects of the Invention As explained above, no matter what type of terminal receives a call from any of the multiple subscriber lines,
It is possible to automatically activate incoming calls to the same type of terminal, and in particular, by configuring multiple subscriber lines with a representative number, access to various types of terminals accommodated in this multiple terminal control device can be made using the same number. It is very easy to operate. In addition, there is no need to change the conventional telephone network, and the sequence for incoming calls from ordinary telephones is the same as that of the conventional telephone network, so it is easy to introduce.

[Brief explanation of the drawing]

Figure 1 shows an example in which the multiple terminal control device of the present invention is applied to a telephone exchange network, and Figure 2 shows the internal configuration of the multiple terminal control device according to the present invention applied to the case of accommodating subscriber lines organized in a representative number. Embodiment FIG. 3 is an embodiment of the internal configuration of a multiple terminal control device according to the present invention applied to accommodate a pair of subscriber lines. 1...Telephone terminal, 2...Facsimile, 3...
Multiple terminal control device, 4, 5...Subscriber line assembled to representative number, 6...Switchboard, 7...Relay network, 8...
... Output of timer 73, 9... Identification request signal transmitter and partner abandonment detector, 10... Output of partner abandonment detector, 11... Non-charging response device, 12
...Identification request signal receiver, 13...Output of identification request signal receiver 12, 14...Type identification signal receiver, 15, 16...Output of type identification signal receiver 14, 17...Type identification signal transmission Vessel, 18, 19...
...Input of type identification signal transmitter 17, 20...I/
O port, 21... Loop detector, 22... Output of loop detector 21, 23... Call detector, 24
... Output of the call detector 23, 25... Start signal generator, 26... Response detector, 27... Output of the response detector 26, 28... Incoming call detector, 29... Output of the incoming call detector 28 Output, 30...Timer, 31...Output of timer 30, 32...Identification request signal transmitter and partner abandonment detector, 33...Output of partner abandonment detector 32, 34...Non-charging response device, 3
5...Identification request signal receiver, 36...Output of identification request signal receiver 35, 37...Type identification signal receiver, 38, 39...Output of type identification signal receiver,
40... Type identification signal transmitter, 41, 42... Input of type identification signal transmitter 40, 43... I/O port, 44... Loop detector, 45... Output of loop detector 44, 46... ...Reverse detector, 47
... Output of reverse detector 46, 48... Call detector, 49... Output of call detector 48, 50...
Starting signal generator, 51...Response detector, 52...
Output of response detector 51, 53...Microprocessor (CPU), 54...Random access memory (RAM), 55...Read only memory, 56...
...Relay A, 57...Relay B, 58...Relay C, 59...Relay D, 60...Relay E, 61
... Relay F, 62 ... Relay G, 63 ... Relay H, 64 ... Relay I, 65 ... Relay J, 6
6...Selection signal generator, 67...Dial, 68
...Reply party response lamp, 69...Resistor, 70...Relay D contact information line, 71...Incoming call detector, 72
... Output of incoming call detector 71, 73 ... Timer, 7
4... Buzzer, 75... Changeover switch, 76...
DC holding circuit, 77... Relay L, 78... Relay K, 79... Busy lamp, 80... Subscriber line support section, 81... Terminal support section, 82... M relay.

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 performs call connection control for the subscriber terminals. The apparatus includes: a call response detection means for detecting a call and a response from the terminal; a terminal connection means for connecting the terminal and the subscriber line; and a reception means for receiving an identification request signal from the called side. , a transmitting means for transmitting a type identification signal; a non-charging response means for detecting an incoming call and responding without charging; an activation means for activating the terminal; a billing response means for making a billing response to the incoming call; A call from a subscriber terminal is detected by the call response detection means, the type of the calling terminal is identified, and if the subscriber line is vacant, the terminal connecting means connects the terminal to the subscriber line. connection, and after the connection, when the receiving means receives a type identification request signal from the called terminal, the transmitting means sends out a type identification signal corresponding to the type of the calling terminal, and an incoming call to the subscriber line , when the non-charging response means responds without charging, an identification request signal is sent by the transmitting means, and a type identification signal is received by the receiving means within a certain time;
The activation means activates the subscriber terminal corresponding to the type identification signal, and when the type identification signal is not received within a certain period of time, the activation means activates the telephone set housed in the multiple terminal control device. the call response detection means detects a response from the terminal or the telephone corresponding to the activated type identification signal, and upon the detection, the terminal connection means connects the terminal and the subscriber line. , and a function of activating the billing response means and making a billing response.