JPH0638261A - Digital private branch exchange system - Google Patents

Abstract

PURPOSE:To extend allocated lines by distributing by distributing outputs of plural clock generators and time switches to plural code detection means and highway selection means via a connection means and a signal line and connecting plural exchanges through extension of lines in on-line. CONSTITUTION:A clock signal is inputted to a signal line 64 in a connection module 34 via a connector 47 and a connection means 51 from a clock generator 39 of an exchange 30 and distributed to code detection means 55-58, highway output selection means 59-62 and time switch connection means 52-54. Then output highways(HW) of a time switch (TS) 35 of the exchange 30 are distributed to the means 55 and HW output selection means 60-62 via the connector 47 and a TS connection means 51. Then Similarly an output HW of a TS 36 is distributed to the means 59, 61, 62 and an output HW of a TS 37 is distributed to means 59, 60, 62. The output of the TS 37 is connected to the means 51 via a connector 47 as an input to the TS 35. Similarly, an output of the TS 35 is connected as the input to the TS 36 and an output of the TS 36 is connected is connected as an input to the TS 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital private branch exchange system capable of online system expansion.

[0002]

2. Description of the Related Art FIG. 2 shows a system connection diagram of a conventional digital private branch exchange. In FIG. 2, 1 to 4 are digital private branch exchanges (hereinafter, referred to as "exchanges") each having the same private branch, 5 to 8 are time switches for performing switching functions between and within the exchanges, and 9 to 12 are PCMs. A clock generator that generates all the timings necessary for exchanging data, 13 to 16 are main control units that control the time switches 5 to 8 and clock generators 9 to 1, 1
7 to 20 are connectors for connecting the exchanges 1 to 4.

Here, the clock generators 9 to 12 can set the input / output mode, and only the clock generator 9 mounted in the master mode exchange 1 is in the output mode, and the clocks mounted in the other exchanges 2 to 4 are set. The generators 10 to 12 are respectively controlled by the main control units 13 to 16 so as to be in the input mode.

The time switches 5 to 8 connect the communication channels of the exchanges 1 to 4, and when the channels between the exchanges are not used, the channels between the exchanges 1 to 4 are bypass-connected (the input channels are output to the same output channel). Are controlled by the main control units 13 to 16, respectively. Also, these time switches 5-8 are
Not only the exchange control described above, but also fixed data set by the main control units 13 to 16 can be output to an arbitrary channel.

In FIG. 2, the exchange 1 is set to the master mode,
A case will be described in which the other is set as the slave mode and the switch 4 is added while the switches 1 to 3 are in operation.

In order for the exchange 3 to operate in a system connection, first, a clock signal required by the clock generator 9 of the exchange 1 is distributed to the exchanges 2 and 3.

The output from the time switch 5 of the exchange 2 is input to the time switch 6 of the exchange 2, and the exchange 2
The output from the time switch 6 is input to the time switch 7 of the exchange 3, and the output from the time switch 7 of the exchange 3 is input to the time switch 5 of the exchange 1. With the above connection, the inputs and outputs of the time switches 5 to 7 are connected in a loop, and the switches 1 to 3 can be connected.

Here, when adding the exchange 4, first,
A signal line 25 is added to the signal line 21 that connects the clock generators 9 to 11 so that the clock generator 9 of the exchange 1
Supplies a clock to the clock generator 12 of the exchange 4. Next, the signal line 24 connecting the time switch 7 of the exchange 3 and the time switch 5 of the exchange 1 is removed, and the clock generator 11 of the exchange 3 and the clock generator 12 of the exchange 4 are connected by the signal line 27. Furthermore,
The clock generator 12 of the exchange 4 is connected via the signal line 26.
And the clock generator 9 of the exchange 1 are connected. In this way, a new loop of the exchange 1, the exchange 2, the exchange 3, the exchange 4, and the exchange 1 can be constructed.

[0009]

However, as is apparent from the above description, in the conventional expansion method using the connection between the digital exchanges, it is possible to remove the signal line 24.
There is a drawback that calls on the inter-exchange channel are interrupted and it is not possible to add on-line exchanges.

An object of the present invention is to solve the above problems, and to provide a digital private branch exchange system in which a plurality of exchanges can be connected by online extension to expand an accommodation line.

[0011]

In order to achieve the above object, the present invention provides at least one set of highway input / output of a time switch of an exchange and a plurality of time switch connecting means to which at least one clock signal is connected. , A plurality of code detections for connecting the exchange to the time switch connecting means, comparing a data code specific to each exchange sent from the time switch of the exchange with a preset data code, and outputting a comparison coincidence detection signal Means and a plurality of input highways provided in the plurality of time switch connecting means, selecting an arbitrary time slot, forming at least one set of highways, and connecting to the output highway of the time switch connecting means. Set an arbitrary data code in the highway output selection means and the code detection means, and Monitor the comparison / match detection signal from the detection means, and when the comparison / match detection signal is detected, the communication path intersystem connection module including the control means for selectively connecting the output of the highway output selection means is set to the master mode digital mode. It was installed in the private branch exchange.

[0012]

According to the present invention, the control means of the inter-system connection module which is operating by connecting the n digital private branch exchanges in a loop between the systems to the unused time switch connection means has the (n + 1) th unit by the above-mentioned configuration. When it is detected by the comparison coincidence detection signal of the code detecting means that the digital private branch exchange is connected, the (n + 1) th digital private branch exchange time is set up to form a new intersystem connection loop by the n + 1 digital private branch exchange. By means of the time switch connecting means connected to the input highway of the switch, all the time slots of the output highway of the time switch in the nth digital private branch exchange connected to the preceding stage of the n + 1th digital private branch exchange are changed to the n + 1th digital private branch exchange. Connect to the input highway of the digital private branch exchange time switch n set in the bypass state +
Initializes the internal buffer of the first digital private branch exchange time switch. The time switch connecting means connected to the time switch in the first digital private branch exchange connected to the subsequent stage of the n + 1th digital private branch exchange, the time slot in the unused state is n + 1.
A time slot of the output highway of the time switch in the second digital private branch exchange is selected, and a time slot of the output highway of the time switch in the nth digital private branch exchange is selected to select at least 1 A pair of highways are connected and connected to the input highway of the first digital private branch exchange time switch, and the time slot in use shifts to the unused state, and sequentially as the (n + 1) th digital private branch exchange time switch The output highway time slot was switched to finally reconfigure the inter-system connection loop by n + 1 digital private branch exchanges.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a connection diagram of a digital private branch exchange system according to an embodiment of the present invention. 30 to 33 are exchanges having the same configuration, 3
In the present embodiment, reference numeral 4 denotes a module for connecting communication path systems of the exchange 1 in the master mode (hereinafter referred to as "connection module"), 35 to 38 are time switches for controlling exchange functions, and 39 to 42 are. A clock generator that generates all the timings necessary for exchanging PCM data, 43 to 46 are main control units that control the time switches 35 to 38 and clock generators 39 to 42, 4
7 to 50 are connectors for connecting the exchanges 30 to 33.

Further, the connection module 34 connects the time switch connecting means 51 to 54 for connecting the highway input / output of the time switch in the exchange and the clock signal, and when the switch is newly connected to the time switch connecting means 51 to 54. , A code detecting means 55 to 58 for comparing a data code specific to each system sent from the time switch with a preset data code, and outputting a detection signal when they match, and all time switch connecting means. 51
Up to 54 input highways, an arbitrary time slot is selected to form one highway, highway output selecting means 59 to 62 connected to the output highway of the time switch connecting means, and an arbitrary data code to the code detecting means. It comprises control means 63 for setting and monitoring the detection signal from the detecting means and for setting the output of the highway output selecting means. Further, the control means 63 monitors the detection signals of the code detection means 55-58 with the signal lines 73-76, and selectively controls the outputs of the highway output selection means 59-62 with the signal lines 77-80. Here, the exchanges 30 to 33 have the same functions as those of the conventional example.

FIG. 3 is a timing chart of a digital private branch exchange according to an embodiment of the present invention. 2.048 MHz, 128K transmitted from the timing generator.
Hz, 64KHz, 32KHz, 16KHz and 8KH
It shows the mutual relationship of z and the time slot designation of PCM data on the highway. It is assumed that all the highways in the following description operate at this timing.

In the following description, as an example of online system expansion, the master mode switch 30 and the slave mode switches 31 and 32 are replaced by the switch 30 → the switch 3.
A case will be described in which a loop is configured in the order of 1 → exchange 32 → exchange 30 and the exchange 33 is added during operation as an exchange system. Therefore, in FIG.
Between the connector 50 and the time switch connecting means 54 of
It is shown as a dotted line.

First, the connection of clock signals will be described. The clock signal shown in FIG. 2 is supplied from the clock generator 39 of the exchange 30 to the signal line 64 in the connection module 34 via the connector 47 and the time switch connecting means 51, and the code detecting means 55 to 58 and the highway output selecting means are supplied. 59 to 62, and further to the time switch connecting means 52 to 54.

Therefore, the clock signal is distributed to the exchanges 31 and 32, respectively. At this time, the clock generator 40 of the switches 31 and 32 in the slave mode
And 41 are set to the input mode by the main control units 44 and 45, respectively.

Secondly, the connection of the input / output highways of the exchanges 30 to 32 will be described. First, the output highway of the time switch 35 of the exchange 30 is supplied to the signal line 65 in the connection module 34 via the connector 47 and the time switch connecting means 51, and is supplied to the code detecting means 55 and the highway output selecting means 60 to 62. To be distributed. The output highway of the time switch 36 of the exchange 31 is supplied to the signal line 67 in the connection module 34 via the connector 48 and the time switch connecting means 52, and the code detecting means 56 and the highway output selecting means 59, 61 and 6 are supplied.
It is divided into two.

The output highway of the time switch 37 of the exchange 32 is supplied to the signal line 69 in the connection module 34 via the connector 49 and the time switch connecting means 53, and the code detecting means 57 and the highway output selecting means 59, 60 are provided. And 62.

In the highway output selecting means 59, the signal line 6 to which the output of the time switch 37 of the exchange 32 is supplied.
9 is selected and connected to the signal line 66. Therefore, the exchange 3
The output of the second time switch 37 is used as the input of the time switch 35 of the exchange 30, and the time switch connecting means 51 is provided.
And the connector 47.

In the highway output selecting means 60, the signal line 6 to which the output of the time switch 35 of the exchange 30 is supplied.
5 is selected and connected to the signal line 68. Therefore, the exchange 3
The output of the time switch 35 of 0 is used as the input of the time switch 36 of the exchange 31 and the time switch connecting means 5
2 and the connector 48.

In the highway output selecting means 61, the signal line 6 to which the output of the time switch 36 of the exchange 31 is supplied.
7 is selected and connected to the signal line 70. Therefore, the exchange 3
The output of the time switch 36 of No. 1 is used as the input of the time switch 37 of the exchange 32, and the time switch connecting means 5
3 and the connector 49.

From the above description, it becomes clear that the input / output highways of the exchanges 30 to 32 are connected in a loop.

Third, the exchange 33 is connected to the connection module 34.
The operation when connected to will be described. When the power is turned on, the time switch 38 of the exchange 33 has a main controller 46.
Sets all channels other than channel 0, which sends a data code peculiar to the exchange 33, to the bypass state, and channel 0 is set to send a data code (for example, F4h).

After that, when the connector 50 of the exchange 33 is connected to the time switch connecting means 54, the clock from the clock generator 39 of the exchange 30 is supplied to the clock generator 42, and the highway input / output of the time switch 38 operates normally. Begin to.

The output highway of the time switch 38 is supplied to the signal line 71 in the connection module 34 via the connector 50 and the time switch connection means 54, and the signal line 7
1 is distributed to the code detecting means 58 and the highway output selecting means 59 to 61.

Channel 0 of the highway on signal line 71
As described above, the data code (F4h) is continuously transmitted to. If the data code (F4h) is set in the code detection means 58 by the control means 63 in advance, the code detection means 58 detects the coincidence of the codes and sends a detection signal onto the signal line 76. Therefore, the control means 63, which constantly monitors the signal line 76, receives the detection signal from the switching means 33 to the time switch connection means 54.
Recognize the connection.

Fourth, the operation of reconstructing the inter-exchanger connection loop will be described. When the control means 63 recognizes the connection of the exchange 33, it first controls the highway output selection means 62 via the signal line 80 to connect the signal line 69 to which the highway output of the exchange 32 is supplied to the signal line 72. The connection timing at this time is point A shown in FIG. Therefore, the output highway of the time switch 37 of the exchange 32 is connected to the input highway of the time switch 38 of the exchange 33, and the inside of the time switch 38 of the exchange 33 is determined by the highway output data of the time switch 37 of the exchange 32. The buffer memory is initialized. That is, the PCM on the signal line 69 is on the signal line 71.
The PCM data delayed from the data by the buffer memory of the time switch 38 is output.

Here, as the time slots of the inter-exchange highway, time slot 100, time slot 1
01, the time slot 102 is used for data communication or voice communication, and the following description will be made assuming that the other time slots are unused.

The control means 63 is the highway output selection means 5
9 through the signal line 77, and with respect to the inter-system highway time slots in the unused state, the time slot of the highway output of the exchange 33 is selected, and the inter-switch highway time slots 100 to 10 in use are selected.
For 2, the time slot of the highway output of the exchange 32 is selected and connected to the signal line 66.

After that, when the time slot 1 of the highway between the exchanges 30 to 33 becomes unused, the control means 63
Controls the highway output selecting means 59 via the signal line 77, and the highway output time slot 1 of the exchange 33.
Is selected and connected to the signal line 66. Thereafter, similarly, as the time slots 2 and 3 of the inter-exchange highway become unused, the time slot corresponding to the highway output of the exchange 33 is switched to.

Therefore, finally, the output highway of the time switch 38 of the exchange 31 is connected to the input highway of the time switch 35 of the exchange 30.
The inter-system connection loop of the exchanges 1 to 4 is reconstructed.

[0034]

As is apparent from the above embodiments, according to the present invention, the control means of the inter-system connection module which is operating by connecting n digital private branch exchanges in a loop is not used. N + to time switch connection means
When the connection of the first digital private branch exchange is detected by the comparison coincidence detection signal of the code detecting means, the time of the n + 1 digital private branch exchange is set to form a new intersystem connection loop by the n + 1 digital private branch exchange. All time slots of the output highway of the nth digital private branch exchange time switch connected to the preceding stage of the (n + 1) th digital private branch exchange are connected by the time switch connecting means connected to the input highway of the switch.
By connecting to the input highway of the + 1st digital private branch exchange time switch, the internal buffer of the (n + 1) th digital private branch exchange time switch, which is set to the bypass state, is initialized, and then the (n + 1) th digital The time switch connecting means connected to the first digital private branch exchange time switch connected to the subsequent stage of the private branch exchange outputs the output of the (n + 1) th digital private branch exchange time switch with respect to the unused time slot. The time slot of the highway is selected, and regarding the time slot in use, at least one set of highways is configured by selecting the time slot of the output highway of the n-th digital private branch exchange time switch, and the first digital On the input highway of the time switch in the private branch exchange Then, as the used time slot shifts to the unused state, the time slot is switched to the output highway time slot of the (n + 1) th digital private branch exchange time switch, and finally the system connection loop by the (n + 1) digital private branch exchange. Since it has been reconstructed, there is an effect that the accommodation line can be expanded online without disturbing the state of data communication and voice communication.

[Brief description of drawings]

FIG. 1 is a connection diagram between systems of a digital private branch exchange according to an embodiment of the present invention.

FIG. 2 is a connection diagram between conventional digital private branch exchange systems.

FIG. 3 is a timing diagram of a digital private branch exchange according to an embodiment of the present invention.

[Explanation of symbols]

 30, 31, 32, 33 Digital private branch exchange 34 Communication path system connection module 35, 36, 37, 38 Time switch 39, 40, 41, 42 Clock generator 43, 44, 45, 46 Main control unit 47, 48, 49, 50 Connector 51, 52, 53, 54 Time switch connecting means 55, 56, 57, 58 Code detecting means 59, 60, 61, 62 Highway output selecting means 63 Control means

Claims (2)

[Claims] 1. A digital private branch exchange having at least one set of highway inputs and outputs of a time switch, a plurality of time switch connecting means to which at least one clock signal is connected, and a digital private branch exchange connecting to said time switch connecting means. , A plurality of code detecting means for comparing a unique data code sent from the time switch of the digital private branch exchange with a preset data code for each system and outputting a comparison match detection signal, and the plurality of time switch connections. Means for selecting an arbitrary time slot from a plurality of input highways included in the means, forming at least one set of highways, and connecting to the output highway of the time switch connecting means; and the code detecting means. Set any data code to the above code A communication path system inter-system connection module comprising control means for monitoring the comparison match detection signal from the output means and, when detecting the comparison match detection signal, selectively connects the output of the highway output selection means in time slot units. A digital private branch exchange system. 2. A control means of an intersystem connection module which is operating by connecting systems of n digital private branch exchanges in a loop form of an n + 1th digital private branch exchange to an unused time switch connecting means. When the connection is detected by the comparison match detection signal of the code detecting means, n +
In order to form a new intersystem connection loop by one digital private branch exchange, the time switch connecting means connected to the input highway of the time switch in the (n + 1) th digital private branch exchange uses the (n + 1) th digital private branch exchange. By connecting all the time slots of the output highway of the n-th digital private branch exchange time switch connected to the preceding stage to the input highway of the n + 1-th digital private branch exchange time switch, the bypass state is set to n + 1. After initializing the internal buffer of the time switch in the second digital private branch exchange,
The time switch connection means connected to the time switch in the first digital private branch exchange connected to the subsequent stage of the first digital private branch exchange, the unused time slot is the (n + 1) th digital private branch exchange. The time slot of the output highway of the internal time switch is selected, and regarding the time slot in use, the time slot of the output highway of the nth digital private branch exchange time switch is selected to configure at least one set of highways. Connected to the input highway of the first digital private branch exchange time switch, and as the time slots in use shift to the unused state, sequentially n + 1
Switch to the output highway time slot of the second digital private branch exchange time switch, and finally n + 1
2. A digital private branch exchange system according to claim 1, wherein the intersystem connection loop of the single digital private branch exchange is reconstructed.