JPH0678352A - Telephone exchange - Google Patents

Abstract

PURPOSE:To attain the reception of various digital communication services via an ISDN line by providing a terminal adaptor section able to connect the ISDN line to the inside of the telephone exchange. CONSTITUTION:A terminal adaptor section F is provided at an input section of the telephone exchange in which line wire talking and doorphone talking are available by using a telephone set on market. The adaptor section F consists of a layer 1 processing circuit 30, an LAPD processing circuit 31, a port selection circuit 32 and an analog conversion circuit 33. Thus, the ISDN physical protocol processing (B/D channels), LAPD protocol processing (D channel), Q930/Q931 protocol processing (D channel), ISDN/telephone network interface conversion processing, and high speed conversion processing to insert terminal data to an ISDN frame are implemented. Thus, the telephone exchange A is directly connected to a data line terminator to receive various digital communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange device which enables outside telephone calls and intercom calls with commercially available telephones.

[0002]

2. Description of the Related Art Conventionally, by performing connection control between an external line which is a public telephone line and an extension line as a communication line to which a commercially available telephone is connected, and a connection control between an extension line and a communication line to which an intercom is connected. There is provided a telephone exchange device that enables an outside line call and a doorphone call with a commercially available telephone.

[0003]

By the way, recently, with the digitization of the telephone network, it has become possible to receive various digital communication services from an integrated service digital network (ISDN). Therefore, for example, the telephone exchange device is used for ISD
INS Net 6 proposed by NTT based on N
4 and INS Net 1500 and so on,
It is desired to be able to receive various digital communication services.

The present invention has been made in view of the above points, and an object of the present invention is to provide a telephone exchange device capable of receiving various digital communication services.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a connection control between an external line which is a public telephone line and an extension line as a communication line to which a commercially available telephone is connected, and an extension line and an intercom. In a telephone exchange apparatus that enables an outside line call and a doorphone call with a commercially available telephone by performing connection control with a connected call line, a terminal adapter unit that enables connection with an ISDN line is built in.

In order to facilitate the embedding work, the housing is formed to have a module size of a prefabricated embedded wiring device, and the housing is used for embedding a prefabricated embedded wiring device. It is desirable to be removable from the mounting frame.

[0007]

According to the present invention, as described above, by incorporating the terminal adapter section capable of connecting to the ISDN line,
It is possible to receive various digital communication services via the ISDN line.

[0008]

1 to 3 show an embodiment of the present invention. As shown in FIG. 2, the telephone exchange system of the present embodiment basically has a telephone exchange A connected to an external line L ₁ which is a public telephone line, and an extension L as a communication line to the telephone exchange A.
₂ and a plurality of telephone outlets B connected in parallel via a control line L ₃ as a control signal transmission line, and a commercially available telephone C detachably connected to these telephone outlets B,
It consists of a telephone exchange A and an intercom D connected to the telephone line L ₄ .

Each of the telephone outlets B is integrally provided with a modular jack M connected to the extension L ₂ and also has a speaker SP and displays LD ₁ and LD ₂ connected to the control line L _3.
The telephone C is detachably connected by the modular jack M, and a ringing tone is emitted from the speaker SP at the time of calling the intercom and the call state is displayed on the indicators LD ₁ and LD ₂ . However, the telephone C does not necessarily need to be connected to the telephone outlet B, and may be connected to the modular jack M.

FIG. 1 shows a schematic circuit configuration of the telephone exchange A.
Show. This telephone exchange A is basically an outside line L₁To die
Connected via Audbridge DB and detect incoming external line
Incoming call detection circuit 11 and extension L₂Connected phone C
Hook detection circuit 12 for detecting the hook state of the
Door phone that controls the two-way call between phone D and phone C
A door for detecting a call from the calling circuit 13 and the intercom D
Control line L to the telephone call detection circuit 14 and telephone outlet B
₃A display signal that is a voltage signal is sent via
Display LD of Toe B₁, LD₂For controlling the display of
Generates a voice signal such as the intercom ringing tone with the display control circuit 15
Voice signal generating circuit 16 and amplification for amplifying a calling signal
Telephone exchanges separate from circuits 17 and 18 and telephone outlet B
A speaker S provided to emit a ringing tone on the A side as well
P'and the contact r to switch the outside line L ₁Or call line L
_FourAnd extension L₂Relay Ry that switches and forms the communication path between
And a switching circuit 22 using
L₂And call line L_FourCall when a call path is formed between
Power supply circuit 19 for supplying a call current to machine C, and each of the above circuits
Which performs signal control based on the detection control and the operation control of the CPU
And the control circuit 20 configured by
Switch circuit S controlled to turn on and off₁~ S_FourAnd each of the above
The power supply circuit 21 that creates the power supply for the parts from the commercial power supply AC
I have it. The switch circuit S₁Is an intercom
A switch that controls the supply of power to the talk circuit 13.
Circuit S₂Is the transmission control of the back tone to the intercom D,
Switch circuit S₃Is a telephone that has an outside line ring tone during a call on the intercom
Transmission control to C, switch circuit S_FourIs the intercom ringtone
Ring control from telephone exchange A and control line L₃Of the ringtone
It is for controlling transmission.

The basic operation of this telephone exchange system will be described. In this telephone exchange system, the switching circuit 2 is on standby.
Since the contact r of the relay Ry of _{No. 2} is connected to the outside line L ₁ side, the outside line can be transmitted and the outside line can be received by the same operation as a normal telephone. That is, when making an outside line call, pick up the receiver (off-hook the telephone C), check the outside line tone, and then dial the telephone number of the other party. Note that the off-hook of the telephone C for making an outside line is detected by the hook detection circuit 12, and the control circuit 20 which receives the detection output controls the display control circuit 15 to display on the display LD ₁ of each telephone outlet B. When the outside line calling state is displayed and the outside line call is finished by putting the handset (phone C on-hook), the control circuit 2 receives the detection output of the hook detection circuit 12.
0 stops the operation of the display control circuit 15 and turns off the outside line call display on the display of the telephone outlet B.

When an incoming call is received on an outside line, an incoming signal is sent to the telephone C through the extension L _{2 and} the built-in bell of each telephone C rings, so pick up the handset accordingly (telephone C).
Off-hook), you can make a line call below. The incoming call signal is simultaneously detected by the incoming call detection circuit 11, and the control circuit 20 which receives the incoming call detection signal controls the display control circuit 15 to display on the display of the telephone outlet B that there is an outside line call, and the telephone C When the call to the outside line is completed by on-hook, the display of the outside call of the telephone outlet B disappears. In other words, by looking at the display on the display unit of the telephone outlet B, it is possible to confirm whether or not the other telephone C is making an outside line call (including an outside line calling state), and also confirm that there is an outside line call. There is.

When a calling operation is performed on the intercom D, the intercom calling detection circuit 14 detects the calling operation, and the control circuit 20 receiving the detection signal operates the voice signal generating circuit 16 to generate the intercom calling signal. By turning on the switch circuit S ₄ for this intercom ringing signal, the amplifier circuit 1
8 to the amplifier circuit 17. Therefore, the amplifier circuit 17
Output, the speaker SP provided in the telephone exchange A sounds, and the intercom ringing tone (ping-pong) is emitted from the telephone exchange A. Furthermore, the intercom ringing signal is sent from the amplifier circuit 17 to the telephone outlet B via the control line 3 so that the speaker of the telephone outlet B also emits the intercom ringing tone. At this time, the control circuit 20 turns on the switch circuit S ₂ to send the intercom ringing signal to the intercom D side as a back tone. Simultaneously with the above-mentioned calling operation, the control circuit 20 operates the display control circuit 15 to cause the display of the telephone outlet B to display an indication that there is an intercom call. In this way, when there is a call to the intercom, the switching circuit 22 forms a communication path between the extension L ₂ and the communication line L ₄ for only 30 seconds,
By simply off-hooking any one of the telephones C, the intercom call can be automatically made without any other operation.
However, when an intercom call is made during an outside line call, the intercom ring tone is sounded and the intercom call is displayed, but as mentioned above, no call path is formed between the extension L _{2 and the} call line L _4. Is done.

By the way, in this embodiment, the incoming call detection circuit 11
Is provided on the input side of the outside line L ₁ with respect to the contact r of the relay Ry ₁ of the switching circuit 22 so that the incoming signal can be detected at all times regardless of the state of formation of the communication path of the telephone exchange A. When there is an outside line call, the user can be notified that there is an outside line call. That is, when an incoming call signal is detected by the incoming call detection circuit 11 during a doorphone call, the control circuit 20 causes the voice signal generation circuit 16 to generate a pseudo ring tone (pull-pull sound), and the pseudo ring tone is transmitted through the switch circuit S ₃ . It is sent to the extension L ₂ and the telephone C notifies the user of the incoming state of the outside line. At the same time, an indicator indicating an incoming call to the outside line is turned on to indicate that there is an incoming call to the outside line. The user who hears this pseudo ring tone once hooks the telephone C to end the intercom call,
When the telephone C is off-hook again, the contact r of the relay Ry
Is switched to the outside line L ₁ side, and outside line communication becomes possible. However, since the control circuit 20 does not judge that the telephone C is on-hook unless the on-hook state continues for 2 seconds or more, the above-mentioned on-hook period must be 2 seconds or more.

Further, in the telephone exchange system, in addition to the above-mentioned call function, the output of the emergency push button I, the sensor, etc. (however,
It is necessary to be a non-voltage ON contact), and the speaker SP of the telephone exchange A and the speaker S of the telephone outlet B are received.
An alarm sound (peeppo sound) can be emitted from P. When the emergency push button I is pressed, the control circuit 2
0 generates a voice signal for a warning sound from the voice signal generating circuit 16, gives this signal to the speaker SP through the amplifying circuits 17 and 18 and causes the telephone exchange A to sound a warning signal, and the telephone outlet B through the control line 3. The alarm sound is emitted from the speaker of the telephone outlet B as well.

Further, to allow the door phone call pending outside line L ₁ by allowing hooking operation regardless of the telephone C of the push-button and dial pulse type, when the extension L ₂ is disconnected from the external line L ₁ to a DC閉結circuit 23 to hold and DC閉結the external line L _1, is provided with a holding tone transmission circuit 24 for sending a holding tone when external hold an outside line L _1. The DC closing circuit 23 is configured to supply power to the holding sound sending circuit 24 when the outside line L ₁ is DC closed.
Further, the hold sound sending circuit 24 is composed of a melody generating IC 26 in which the generation of the hold sound is controlled by the control circuit 20, and the hold sound of the melody sound generating IC 26 is passed through a filter circuit 27 for removing high frequency components to the outside line L ₁ Sent to.

The operation of holding the outside line L ₁ and making a doorphone call when a doorphone call is made during an outside line call will be described. If there is an intercom call during an outside line call, the intercom ringing tone is emitted from the speaker SP of the telephone exchange A and the speaker of the telephone outlet B as described above. Then, when the user who hears the ringing tone of the doorphone hooks on the telephone C, the outside line L ₁ is held and the doorphone call can be performed. When switching from the intercom call to the outside call within the intercom call-enabled period, the hooking signal may be input from the telephone C again as described above.

When the outside call is not held and the intercom call is made instead of holding the outside line L ₁ as described above, the telephone C is on-hook (for 2 seconds or more) and then off-hook. , You can make a doorphone call after ending the outside line call. In the telephone exchange according to the present embodiment, in addition to the above configuration, a terminal adapter section F that enables connection with an ISDN line is provided in the input section. This terminal adapter part F is a layer 1
The ISD includes a processing circuit 30, a LAPD processing circuit 31, a port selection circuit 32, and an analog conversion circuit 33.
N physical protocol processing (B / D channel), LAP
D protocol processing (D channel), Q930 / Q93
1 protocol processing (D channel), ISDN / telephone network interface conversion processing, speed conversion processing for inserting terminal data into an ISDN frame, and the like. By including the terminal adapter unit F in this way, the telephone exchange apparatus A of the present embodiment can be used as a home data line termination device (DSU:
digital service unit) can be directly connected. Therefore,
It becomes possible to receive various digital communication services.

As shown in FIG. 3, the casing 40 of the telephone exchange A has a box-shaped body 41 having an open upper surface and an interior divided into three compartments, and a box-shaped body 41 having an open lower surface.
And a cover 42 fitted to the upper surface of the opening of the casing 40. The casing 40 accommodates _two printed circuit boards 43 ₁ and 43 ₂ on which the circuit components constituting the circuit are mounted. These printed circuit boards 43 ₁ and 43 ₂ are connected by a flat cable 44, the printed circuit board 43 ₁ is fixed to the cover 42, and the printed circuit board 43 ₂ is fixed to the body 41 by screws. _On the upper surface of the printed circuit board 43 ₁ , there are mounted at least a display unit 45 showing the energization state of the commercial power source AC, and a speaker SP notifying the intercom ringing tone.
A through hole 46 exposing the display 45 and a slit hole 47 for producing sound of the speaker SP are formed in a portion of the cover 42 corresponding to the display 45 and the speaker SP, and are attached to the upper surface of the cover 42. A through hole 49 and a slit hole 50 are also formed in the name plate 48 as shown in FIG. The speaker SP is connected to the printed board 43 ₁ by a connector. The step-down transformer 5 of the power supply circuit 21 is provided at the center of the lower surface of the printed circuit board 43 _2.
1 is mounted, a power supply line is fast-connectable to one end side, and a quick-connect terminal device 52 that can be detached is mounted on the body 41 when the printed board 43 ₂ is screwed to the body 41. The quick-connect terminal device 52 is housed in the compartment on the one end side, and the step-down transformer 51 is housed in the central compartment. In the compartment on the other end side of the body 2, a terminal portion 53 for a signal line for connecting the outer line L ₁ , the inner line L _{2, the} communication line L _{4 and the} like is formed by screwing, and the terminal portion 53 is formed.
Also, the quick-connect terminal device 52 is covered with terminal covers 54 and 55 attached to the lower surface of the body 41.

By the way, the telephone exchange A can be embedded in a wall surface or the like by using a mounting frame 60 made of synthetic resin shown in FIG. The mounting frame 60 is used for embedding a standardized three-unit size ready-made wiring device in a wall surface or the like. In the present embodiment, the upper portion of the cover 42 bulges out in a shape in which the central portion in the end direction is exposed from the opening of the mounting frame 60 so that the casing 40 can be attached to the mounting frame 60, and the side edges are lowered to the side. Two sets of two locking pieces 56 project from each pair. That is, the locking piece 56 on the one end side is inserted into the insertion hole 61 of the mounting frame 60, and the locking piece 56 on the other end side is locked in the locking hole 62 by utilizing the flexibility of the mounting frame 60. Then, the telephone exchange A is attached to the attachment frame 60. The mounting frame 60 has the locking piece 56 with the locking hole 6
The casing 40 is detachably attached to the attachment frame 60, and includes a release piece 65 that is detached from the casing 2. Further, a pair of fitting holes 57 are formed at the base end portions of both ends of the central portion which is bulged above the cover 42, and the telephone exchange A is embedded in the wall surface or the like even if a metal mounting frame is used. I can do it.

The telephone exchange A is attached to the wall surface or the like as follows. First, the telephone exchange A is attached to the mounting frame 60 as described above, and then the mounting frame 60 is fixed by screwing it into the embedded box embedded in the wall surface or the like through the mounting hole 63, and finally the mounting frame 60 If a decorative plate frame is attached to the front surface by screwing it through the plate screw holes 64, the telephone exchange A is embedded in the wall surface or the like.

[0022]

As described above, the present invention controls connection between an external line which is a public telephone line and an extension line as a communication line to which a commercially available telephone is connected, and a connection between the extension line and a communication line to which an intercom is connected. In a telephone exchange device that enables external calls and intercom calls with a commercially available telephone by performing control, it has a built-in terminal adapter that enables connection with an ISDN line. Connection is possible, and various digital communication services can be received via the ISDN line.

Further, by forming the size of the housing to be a module size of a ready-made embedded wiring device, and by making the housing detachable to a mounting frame used when the ready-made embedded wiring device is embedded, The embedding work can be easily performed in the same manner as the ready-made embedded wiring device.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a telephone exchange device according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram of a telephone exchange system.

FIG. 3 is an exploded perspective view of the telephone exchange device.

[Explanation of symbols]

A Telephone switchboard C Telephone D Doorphone F Terminal adapter L ₁ External line L ₂ Internal line L ₄ Telephone line

[Procedure amendment]

[Submission date] November 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

By the way, recently, with the digitalization of the telephone network, comprehensive digital communication of services has become possible.
Shin network (ISDN: integrated service digital networ
It is possible to receive various digital communication services from k). Therefore, it is desired to connect the telephone exchange device to the INS net 64 or the INS net 1500 proposed by NTT based on ISDN so as to receive various digital communication services. There is.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

By the way, in this embodiment, the incoming call detection circuit 11
Is provided on the input side of the outside line L ₁ with respect to the contact r of the relay Ry ₁ of the switching circuit 22 so that the incoming signal can be detected at all times regardless of the state of formation of the communication path of the telephone exchange A. When there is an outside line call, the user can be notified that there is an outside line call. That is, when an incoming call signal is detected by the incoming call detection circuit 11 during a doorphone call, the control circuit 20 causes the voice signal generation circuit 16 to generate a pseudo ring tone (pull-pull sound), and the pseudo ring tone is transmitted through the switch circuit S ₃ . It is sent to the extension L ₂ and the telephone C notifies the user of the incoming state of the outside line. At the same time, an indicator indicating an incoming call to the outside line is turned on to indicate that there is an incoming call to the outside line. The user who hears this pseudo ring tone once hooks the telephone C to end the intercom call,
When the telephone C is off-hook again, the contact r of the relay Ry
Is switched to the outside line L ₁ side, and outside line communication becomes possible .

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

[0018] Instead of performing the intercom call pending outside line L ₁ as described above, when performing intercom calls from the end of the external call, the phone C after had to-hook <br/> If you go off-hook, you can make an intercom call after ending an outside line call. In the telephone exchange according to the present embodiment, in addition to the above configuration, a terminal adapter section F that enables connection with an ISDN line is provided in the input section. The terminal adapter unit F includes a layer 1 processing circuit 30,
It is composed of an LAPD processing circuit 31, a port selection circuit 32, and an analog conversion circuit 33, and has physical protocol processing of ISDN (B / D channel), LAPD protocol processing (D channel), Q930 / Q931 protocol processing (D channel), It performs conversion processing of the ISDN / telephone network interface, speed conversion processing of inserting terminal data into the ISDN frame, and the like. By providing the terminal adapter unit F in this way, the telephone exchange apparatus A of this embodiment can be installed in a home data line terminating device (DSU: digital servic).
e unit) can be directly connected. Therefore, it becomes possible to receive various digital communication services.

Claims (2)

[Claims] 1. A commercial line by controlling the connection between an external line that is a public telephone line and an extension line as a communication line to which a commercially available telephone is connected and a connection line between an extension line and a communication line to which an intercom is connected. What is claimed is: 1. A telephone exchange device capable of making an outside line call and a doorphone call using a telephone, which comprises a terminal adapter section capable of connecting to an ISDN line. 2. The housing is formed to have a module size of a ready-made embedded wiring device, and the housing is detachably attached to a mounting frame used when the ready-made embedded wiring device is embedded. The telephone exchange device according to claim 1.