JPS588800B2 - electronic exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic exchange that can effectively control and transmit data between regular telephones and telephones equipped with various functions.

With the advanced development of the information society, data transmission using telephones has diversified.

For this reason, switching equipment is required not only to be quick in switching processing and reliable, but also to be able to provide a variety of services, provide general-purpose systems, and be easy to install and maintain.

Figure 1 is a schematic diagram showing an example of a conventional automatic telephone exchange.
1 is a subscriber circuit (LC) that relays telephone 2, 3 is a central office trunk circuit (COT), and 4 is a service trunk circuit (
ST), 5 is an operator trunk circuit (OP) that relays the operator console (ATT).

These circuits 1, 3, 4.5 are switch networks (
SKJw) 6, and exchange control is performed by a control device 7.

This control device 7 includes a subscriber circuit 1 and each trunk circuit 3.
, 4.5, a scanning device (SCN) that monitors the status of the communication path network, a switch drive circuit (SC) that controls the communication path network, a trunk control device (TC) that sends control information to each of the trunk circuits 3, 4, and 5, A central processing control unit (CC) controls the operation of each of these circuits (devices), and data required for exchange control. Memory that stores programs, etc. (MRY)
, etc.

With the control device 7 configured in this way, the exchange can:
For example, as a service by operating the subscriber's telephone 2,
A wide variety of new services such as transfer, callback, pick-up, camp-on, add-on, holding, conference call, call waiting, paging, speed dial, and don't discard can now be performed. .

However, in order to effectively utilize such service functions, when using the dial type or push button type telephones that are currently widely used, the operation becomes extremely complicated and the handling becomes complicated.

Therefore, it is difficult to effectively utilize the multifaceted service functions described above, and troubles may occur due to erroneous operations.

Therefore, recently, a key telephone 8, for example, as shown in FIG. 2, has been developed which can simplify the use of these service functions.

This key telephone includes an audio circuit 11 and a signal circuit 12 connected to the audio line and the data line, respectively, a handset circuit 14 that drives a handset 13 and is adjacent to the audio circuit 11, a fix 15, and a key matrix operation console 16. The control circuit 18 is connected to the signal circuit 12 and is connected to the signal circuit 12 for inputting information and displaying service information and functional status using a display 17.

The speaker 19 is configured to be driven by information from the control circuit 18 or the handset circuit 14 via an amplifier.

According to the key telephone 8 having such functions, it is possible to transmit various information through simple operations (hook switch 15, key matrix 16) for various services.

However, along with this key telephone 8, the above-mentioned. When trying to commonly exchange control the telephones 2 with the conventional structure,
The following problems arose.

First, in order to control the key telephone 8, a key telephone control device (KT) is connected to the subscriber circuit 1 as shown in FIG.
When providing SU) 9, it is necessary to arrange a predetermined number of the devices 9, for example, every 5 to 6 key telephones 8.

Furthermore, since these connecting cables are special, the control unit (KTSU) 9 must be installed near the key telephone 8 from an economic standpoint.

This means that the control units (KTSU) 9 are distributed, which makes the control system complicated and makes unified operation management of the system difficult.

Furthermore, even if telephone numbers are changed or relocated due to relocation, it is very uneconomical in terms of construction, maintenance, etc.

Further, as shown in FIG. 3, the voice line and data line of the key telephone 8 are separated, and the data line is directly connected to a key telephone circuit (KTC) 9 provided in the control device 7.
In this case, where it is possible to connect to the network a, unified operation management is achieved compared to the configuration shown in FIG. 4, and construction and maintenance are also improved.

However, it is uneconomical to set the number of key telephone circuits (KTC) 9a with a sufficient margin in advance, and if the number of key telephone circuits 8 increases beyond the set number of circuits, the control There is a problem in that the specifications of the device 7 must be changed.

Furthermore, since the voice line circuit and the data line circuit are separated, an independent line network is required, and furthermore, the subscriber circuit (LC) 1 cannot be shared, which is uneconomical.

In other words, the voice line and data line cannot be connected to each other, resulting in a decline in service performance.

The present invention was made in consideration of these circumstances, and its purpose is to have a simple configuration, to be able to receive various services with easy operation, and to be highly effective under unified operational management. It is an object of the present invention to provide an electronic exchange that enables exchange control that enables data transmission and reception, is easy to construct and maintain, and is economically advantageous.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 is a schematic configuration diagram, in which 21a, 21b, and 21c indicate circuit groups, respectively.

These circuit groups 21a, 21b, and 21c each have a predetermined number of subscriber circuits 22a, 22b and central office trunk circuits 23 each having a predetermined function, and a terminal control circuit (TCC) 24a. ,2
The operation is controlled by 4b and 24, respectively.

That is, here, the circuit group 21a groups four to five dial type or push button type telephones 2, and each telephone 2 is connected to the subscriber circuit 22a.

The telephone 2 via these subscriber circuits 22a
Voice information from the network is supplied to the voice network for exchange control.

Also, voice information exchanged and controlled by the voice network is supplied to the telephone set 2 via the subscriber circuit 22a.

Further, the circuit group 21b includes a predetermined number of key telephones 8 having the above-mentioned multi-functions, for example, 4 to 6, grouped together, and the key telephones 8 are connected to the subscriber circuit 22b.

This subscriber circuit 22b connects the voice information to the voice network to perform exchange control, and also connects the voice information to the voice network and performs exchange control.
It transmits and receives various data to and from the TCC 24.

Details of these subscriber circuits 22a, 22b and TCC 24 will be explained later.

Furthermore, the circuit group 21c connects a plurality of office lines to the voice network via the office line trunk circuit 23, and the operation of the trunk circuit 23 is controlled by the TCC 24 like the circuit groups 21a and 21b. .

In this way, the subscriber circuit 22a has a predetermined function.
, 22b, and each circuit group 21a, 21b, 21c in which the central office line trunk circuits 23 are grouped by a predetermined number.
are provided as appropriate depending on the number of terminal devices (telephone 2, key telephone 8, office line).

Each terminal control circuit (TCC) 24 of each of these circuit groups 21a, 21b, and 21c is connected to a central control unit (CC) 2.
5 and are commonly connected by a transmission bus 26 and a reception bus 27.

Although the TCC 24 will be described in detail later, when the telephone 2 is connected, the TCC 24 transmits DC level signals such as dial pulse signals and hook-off/hook-on signals to the 2 via the transmission bus 26.
It also inputs and decodes data from the CC 25, and provides a dial tone control signal to the telephone 2.

When the key telephone 8 is connected, the above functions are performed, and the key telephone 8 and CC25
It relays the transmission and reception of data with, for example, converting the speed.

The subscriber circuits 22a and 22b described above are constructed as shown in FIG. 6, for example.

That is, the power input circuit 22a connects the telephone 2 to the hybrid circuit 31 as shown in the block of the circuit group 21a.
is connected to.

This hybrid circuit 31 supplies a transmission signal from the telephone 2 to a codec 33 via a filter 32, encodes it into PCM, for example, and sends it to a PCM bus line 29.

Also, the audio information inputted to the codec 33 via the PCM line 29 is decoded by the codec 33 and supplied from the hybrid circuit 31 to the telephone 2 via the filter 34.

Further, a ringing signal is inputted to this hybrid circuit 31 from the TCC 24 via a ringing sending circuit 35, so that the telephone 2 is activated to make a ringing operation.

Further, dial information and hook-off/hook-on operation signals from the telephone set 2 are inputted to a DC level detection circuit 36 via a hybrid circuit 31, detected, and supplied to the TCC 24.

Thus, by such a subscriber circuit 22a, the telephone 2 can be turned off. For Futuku-on and dial operation information, please refer to T.
It is sent to the CC 25 via the CC 24 and used as exchange control information.

Further, the ringing sending circuit 35 is energized by data specifying the telephone 2 from the CC 25, and the telephone 2 is placed in a called state, that is, the bell rings.

After that, a line connection is made and codec 33 to P
Voice information is communicated via the CM bus line 29.

On the other hand, the subscriber circuit 22b shown in the block of the circuit group 21b is constituted by a hybrid circuit 37 connected to the voice line of the key telephone 8, a hybrid circuit 38 connected to the data line, and the like.

The hybrid circuit 37 is the hybrid circuit 31
It functions similarly to 32.3 and filters audio information.
4 codec 33 to enable communication with the PCM bus line 29.

In addition, since the key telephone 8 is generally equipped with a ringing function and a DC level detection function, a
The data sent to and received from the C25 is directly sent to and received from the key telephone 8 via the hybrid circuit 38.

The data transmitted and received with the key telephone 8 is transmitted to and from the key telephone 8 when the key telephone 8 is turned off. This information includes telephone number, dial operation information, various data service information, LFD information, etc.

Note that if the key telephone 8 is not equipped with a ringing function or a DC level detection function, the ringing circuit 35 and the DC level detection circuit 36 are replaced by a hybrid circuit 37.
Of course, it is also possible to configure the connection.

The subscriber circuits 22a and 22b configured in this way are provided in each circuit group 21a and 21b, corresponding to the telephone set 2 and key telephone 8 to be connected, respectively.

Next, the terminal control circuit (TCC) 24 will be explained.

FIG. 7 is a schematic diagram of the circuit 24. This TCC2
4 is each circuit group 21a. 21b and 21c have the same configuration, but perform different operations depending on the mode designation signal.

For example, the mode signal (Ml, MO) is (0.1
) performs different controls for the key telephone 8, (1.0) for the telephone 2, and (1.1) for the central office line trunk.

The characteristics of this TCC 24 and its operation will be explained below according to the operation mode.

First, when the TCC 24 performs a control operation on the key telephone 8, the operation is set by the mode designation signal (0, 1.).

This mode designation signal is input manually to the sequence controller 41, and is also input to an input detection circuit 42, which will be described later.

Further, the sequence controller 41 is driven by a clock signal and its operation is controlled by detection signals from the address comparator 43 and the input detection circuit 42.

The clock signal is also supplied to a counter 44 which is reset by the synchronization signal, and is counted by the counter 44.

The counted value of this counter 44 is input to the address comparator 43, and a match with a predetermined address address of the self (TCC) is detected.

Furthermore, information stored in an address register 45 that stores information (address) transmitted from the CC 25 via the reception bus 27 is input to the address comparator 43 .

The information transmitted from the CC25 is, for example, the circuit group address consisting of A7, A6 to A2, as shown in FIG.
1, Ao, and D1o, D9.
~Do.

Addresses A7, A6 to Ao of such information are stored in the address register 45, of which A7, A6, to Ao are stored.
Two circuit group (TCC) addresses are input to the address comparator 43.

When the address information matches its own address, the address comparator 43 activates the sequence controller 41 and stores the D10,
Data D9, to Do are stored.

Thereafter, the subscriber addresses A1 and Ao stored in the address register 45 are decoded and outputted as a selection output control signal of the demultiplexer 47.

The information stored in the data register 46 by the operation of the demultiplexer 47 is
The signal is inputted to the modulation circuit 48 via the signal line, and is modulated into, for example, a bipolar signal or a di-phase signal.

This modulated signal is transmitted to the sequence controller 4.
1 through an output gate circuit 49 gated by 1.

Here, the subscriber addresses A1 and Ao are for controlling the output of the output gate circuit 49, and are (0.0) "output O".
, (0.1) is "output 1", (1,0) is "output 2",
Then, in (1.1), the above-mentioned modulated data is outputted to "output 3".

From the output designated by the subscriber address information A1, Ao, the information stored in the data register 46 is sent to the key telephone 8 via the hybrid circuit 38.

Further, when data is input from the key telephone 8, the data is sent to the "input 0" corresponding to the key telephone 8 of the input gate circuit 50 via the hybrid circuit 38.
, "input 1", "input 2", and "input 3", respectively.

This input gate circuit 50 is also gate-controlled by the sequence controller 41.

Further, gate-controlled input information is input to a demodulation circuit 51 and demodulated, and then supplied to a multiplexer 52.

This multiplexer 52 is connected to the sequence controller 4
1, and the signal extracted via this multiplexer 52 is stored in a data register 53.

Further, the subscriber address information is input to this data register by the sequence controller and added to the information from the key telephone 8.

Therefore, the format of the information stored in this data register 53 is, for example, as shown in FIG.
6 to Do and subscriber address information A1 and Ao.

On the other hand, the counter 44 counts the clock signals after being reset by the synchronization signal.

And when the count value becomes its own address,
That is, when the sequence controller 41 reaches its assigned time slot, the sequence controller 41 activates the data register 53 and sends the information stored in the register 53 to the CC 25 via the transmission bus 26.

Next, when the TCC 24 performs a control operation on the telephone 2, the operation setting is made by the mode designation signal (1.0).

In this case as well, the address register 45 stores address information A71 A6 to Ao, and the data register 4
6, data D.

, D9, ~D.

is stored. The addresses A1 and Ao of the information stored in the address register 45 similarly designate the selection of the telephone set 2, and the same information is supplied to the latch circuit 54.

This latch circuit 54 controls ON/OFF of the output based on, for example, information D3 stored in the data register 46.

Therefore, if the data D3 is "1" now, the latch circuit 54
is the information A1, .

Latch into the latch re-decoded by.

Then, this latched information is transferred to the output gate circuit 49.
For example, output “H level” to “Output O” and “Output 1”.
”, “Output 2”, and “Output 3” are alternatively obtained.

That is, A11 Ao is "output O" at (0,0),
"Output 1" at (0.1), "Output 2" at (1.0)
Obtain "output 3" in (1.1).

Conversely, when the data D3 is "0", the "L level" output is inputted from the output gate circuit 49 to the ringing sending circuit 35, and the ringing of the telephone 2 on that line (incoming call) occurs. Supplied as a signal.

On the other hand, when making a call from telephone 2, the telephone number. The hook-off operation is detected by the DC level detection circuit 36 and input to each of "input 0", "input 1" to "input 3" of the input gate circuit 50, respectively.

This input information is supplied from the input gate circuit 50 to the input detection circuit 42, set in the data register 53 according to the subscriber address, and sent to the CC2 via the transmission bus 26.
Sent on 5th.

When the TCC 24 operates on a central office line trunk, the mode designation signal (1.1) is used to set the operation.

In general, the office line trunk circuit 23 performs its functions through separate ON/OFF control of three electromagnetic relays.

Now, the mode designation signal (1.0) (0
．． As in case 1), the address register 45 contains information A.
7, Ag to Ao, and data D10, D9 to Do are set in the data register 46.

At this time, for example, information on data D5, D4, D3 and subscriber address A.

The information is used to control the central office line trunk circuit 23.

That is, when Ao is "0", the information of data D5, D4, D3 is set in the latch circuit 54 as the control information of the "output 0", "output 1", "output 2", and the output gate circuit, 49 Output via .

A again. is "1", data D5, D4, D3
In addition to the above-mentioned "Output 3", the information of "Output 4" and "Output 5"
" is set in the latch circuit 53 and output as control information.

Therefore A. is "0", the electromagnetic relay of one central office line trunk circuit 23 outputs "output 0", "output 1", and "output 2".
” are ON-OFF controlled.

Similarly, when Ao is "1", the electromagnetic relay of the other office line trunk circuit 23 is "output 3", "output 4",
ON/OFF control is performed by "output 5".

Conversely, the information from the office line trunk circuit 23 is transmitted to the input gate circuit 49 at "input O", "input 1", or "input 1".
The data are input to "Input 2" and "Input 3" respectively.

These input information are detected by the input detection circuit 42 as in the case described above, and are sent from the data register 53 to CC2.
Sent on 5th.

When the number of circuit groups 21 operating in this manner is n, information is sequentially sent from each TCC 24 of the circuit group to the CC 25 in time slots as shown in FIG.

That is, as shown in FIG. 10a, the TCC 24 at address 0
From there, information configured in the format shown in FIG. 9 is transmitted sequentially, and thereafter information is transmitted sequentially from address 1 to address 2 to address n.

Incidentally, this information transmission is performed in turn in synchronization with the synchronization signal shown in FIG. 6.

In other words, the time slots for each information transmission of each TCC 24 are determined in a time-division manner by a clock signal with the synchronization signal as a reference.

Then, the CC 25 sequentially inputs the above information, performs predetermined signal processing, sends data to other TCCs 24 according to the processing results, and performs exchange control here.

To summarize the above, the electronic exchange according to the present invention is constructed as shown in FIG.

That is, the plurality of TCCs 24 are connected to the transmission bus 26 and the reception bus 2.
7 to a common control device (CC), and a lock signal and a synchronization signal are applied from the common control device 25.

Each TCC 24 is connected to a predetermined number of telephones (dial type telephones, push button type telephones), key telephones, and central office lines, each classified according to a predetermined function.

These numbers can be easily increased or decreased depending on the number of TCCs 24 installed.

Further, a CC25 reference clock generator 61 generates and outputs a synchronization signal and a clock signal, and also supplies the same signals to a counter 62.

In addition, the CPU 63 and memory (MRY) 64 are SIO 65,
66 and the counter 62 are connected in a bus configuration.

The SIO 65 is connected to the reception bus 27 as an interface, and the SIO 66 is connected to the transmission bus 26 as an interface.

When information is input via the SIO 66, it is determined from the count value of the counter 62 whether the information is from the TCC 24, and the received information is analyzed by the CPU 63 based on various information stored in the MRY 64. ing.

Thereafter, information is sent to the transmission bus 27 via the SIO 65 based on the analysis result.

At this time, data etc. from key telephone 8 are sent to MRY64.
The data is temporarily stored in the MRY 64, and is read out and sent out from the MRY 64 at a predetermined time slot based on the above analysis result.

Thus, exchange control via the transmission bus 26 and reception bus 27 is performed here.

Also, audio information is transmitted separately via an audio network.

Control of this voice network is performed in the same way.

As described above, according to the present invention, in order to perform switching control of key telephones, general telephones, etc. equipped with various service functions by configuring a predetermined number of circuit groups for each function, CCs such as TCC are used. Unified management can be easily performed.

In addition, TCC performs different functions depending on the mode specified, so construction. Maintenance and inspection are easy, and the system can be configured at low cost.

Moreover, each subscriber is able to easily handle the switching and receive a variety of services because the switching is controlled under unified management.

Conference calls, etc. can also be easily controlled on the CC.
The effect is tremendous.

Moreover, when changing telephone numbers or relocating due to relocation, this can be easily done by, for example, replacing the subscriber circuit or central office trunk circuit in a circuit group in a plug-in manner, thereby reducing the uneconomical costs of rewiring. There is no

Furthermore, since the number of lines can be increased simply by increasing the TCC, there is no uneconomical cost involved in replacing the entire exchange with one that specifies large lines, as was the case in the past. Demonstrates tremendous benefits.

Note that the present invention is not limited to the above embodiments.

For example, the number of lines forming a circuit group and the number of circuit groups may be determined according to specifications.

It goes without saying that the format of the information data, that is, the data Dn, ~Do, addresses Am~Ao, etc., may be determined as appropriate based on the same specifications.

Furthermore, the circuit configuration of each part, such as the circuit configuration of the TCC, may be determined as appropriate.

In short, the present invention can be implemented with various modifications without departing from the gist thereof.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of a conventional exchange; Fig. 2 is a block diagram showing an example of a key telephone; Figs. 3 and 4 are block diagrams of a case in which various service functions are added to a conventional switch; 5 to 11 are for explaining one embodiment of the present invention. FIG. 5 is a schematic diagram of the overall configuration, FIG. 6 is a diagram showing the configuration of a circuit group, especially the subscriber circuit, and FIG. A configuration diagram of a terminal control circuit, FIG. 8 is a diagram showing an example of the format of received information, FIG. 9 is a diagram showing an example of the format of transmitted information, and FIG.
FIG. 0 is a diagram showing time slots for information transmission, and FIG. 11 is a system configuration diagram.

Claims (1)

[Claims] 1 Classify multiple types of subscriber circuits and central office trunk circuits with different functions according to the functions each has, form at least one circuit group each, and connect these circuit groups and a common control device via a bus. commonly connected, the common controller addresses each of the circuit groups via the bus and transmits data to the circuit group, and each of the circuit groups addresses the circuit group via the bus at a predetermined time slot. An electronic switching system characterized in that it transmits data to a common control device to control switching between each of the subscriber circuits and a central office line trunk circuit.