KR100186231B1 - Automatic converting apparatus of switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Exchanger

2. The technical problem to be solved by the invention

Auto switching function is performed at the exchange

3. Summary of the Solution of the Invention

An automatic switching device of an exchange that automatically converts a trunk line incoming call to a specific station is connected to a switching circuit, and a serial-to-parallel converter for converting received serial voice data into parallel data, and storing the parallel converted voice data as a guide voice message. A memory, a DTMF receiver connected to the switching circuit for converting the received DTMF signal into digital data, a parallel and serial converter for converting the parallel voice data output from the memory into serial voice data and outputting the serial voice data to the switching circuit; A time-sharing allocator for allocating time slots of the sub-parallel and serial-to-parallel converters, an IPC unit connected to the exchange control unit to receive a command for automatic switching, and voice data converted in parallel by controlling the memory in recording mode as a guide voice message. Stores and controls the memory in automatic switching mode to reproduce and output guide voice messages and to receive DTMF signals. It is composed of automatic switching control unit which outputs extension number to exchange control unit.

4. Important uses of the invention

When the automatic switching function is implemented at the exchange, a memory that stores a message for guiding automatic switching can be implemented as one service.

Description

Automatic switching device and method of exchange

1 is a block diagram showing a block configuration of an exchange performing an automatic switching function.

2 is a diagram showing a conventional automatic switching device configuration in an exchange performing an automatic switching function.

3 is a diagram showing the configuration of an automatic switching unit according to the present invention in an exchange performing an automatic switching function.

4 is a diagram showing the detailed configuration of the automatic switching control unit in FIG.

FIG. 5 is a diagram showing the detailed configuration of the memory unit in FIG.

FIG. 6 is a diagram showing a detailed configuration of a decoding unit in FIG.

7 is a diagram showing the detailed configuration of the IPC unit in FIG.

FIG. 8 is a diagram showing the detailed configuration of the serial-to-parallel conversion unit in FIG.

9 is a diagram showing the detailed configuration of the parallel-to-serial conversion unit in FIG.

10A and 10B are waveform diagrams showing timing relationships for accessing voice data of the memory section in the automatic switching control section.

11A to 11D are waveform diagrams showing the timing relationship of receiving an IPC message transmitted from the switching controller from the automatic switching controller and timing of receiving an IPC message from the switching controller to the automatic switching controller.

12 is a diagram showing IPC messages processed by an exchange control section and an automatic switching control section.

FIG. 13 is a waveform diagram showing a timing relationship for converting serial data received from a highway into parallel data in a serial-to-parallel converter.

FIG. 14 is a waveform diagram showing a timing relationship for converting parallel data into serial data and outputting them to the highway in the parallel-to-serial converter.

FIG. 15 is a flowchart illustrating a process of transmitting information of voice announcement data to be recorded by the switching controller by the automatic switching unit in the recording mode.

FIG. 16 is a flowchart illustrating a process of recording, by the automatic switching unit, voice guidance data received under the control of the switching controller in the recording mode.

FIG. 17 is a flowchart illustrating a process of transmitting, by a switching controller, information of voice announcement data to be played back to an automatic switching unit in a playback mode.

18 is a flowchart illustrating a process of the automatic switching unit playing back the voice guidance data recorded under the control of the switching control unit in the playback mode.

The present invention relates to an exchanger, and more particularly, to an automatic switching device and method capable of automatically connecting a call path between an incoming call line and an extension line when an incoming call occurs.

FIG. 1 is a diagram showing the configuration of an exchange having an automatic switching function, wherein the exchange control unit 111 controls the call switching and controls the overall operation of the exchange to provide various services to the user. The memory unit 112 stores the basic call ca11 and the program and initial service data of the exchange control unit 111 for performing various functions, and temporarily stores the data processed by the exchange control unit 111. The memory unit 112 includes a ROM for storing program and service data and a RAM for temporarily storing data generated during program execution. The switching circuit 113 switches various tones and voice data under the control of the exchange control unit 111. The subscriber circuit 114 supplies a call current to the subscriber telephone under the control of the switching control section 111 and simultaneously interfaces a signal between the subscriber telephone and the switching circuit 113. The ring generator 115 generates a ring signal and supplies the ring signal to the subscriber line. The tone generator 116 generates various tone signals under the control of the exchange control unit 111 and outputs them to the switching circuit 113. The trunk line circuit 117 forms a trunk line call loop by seizing a trunk line under the control of the exchange control unit 111, and interfaces a signal between the trunk line and the switching circuit 113. Here, the trunk line refers to a line connecting the trunk line circuit 117 and the trunk line exchange period. The automatic switching unit 118 performs a function of automatically connecting the originating trunk line with the incoming extension station under the control of the exchange control unit 111. The music generator 119 generates hold music under the control of the exchange control unit 111.

Looking at the process of performing the automatic switching operation in the switch having the above configuration, when the incoming call (incoming ca11) of the CO line subscriber, the CO line circuit 117 notifies the exchange control unit 111. Then, the exchange control unit 111 detects the trunk line incoming call and controls the switching circuit 113 to form a communication path between the automatic switching unit 118 and the trunk line. At this time, the automatic switching unit 118 outputs a voice guidance message for automatic switching to the switching circuit 113. Then, when the CO subscriber dials the telephone number of the extension subscriber to call after listening to the guide voice message, the exchange control unit 111 receives the extension subscriber number through the automatic switching unit 118. Then, the exchange control unit 111 controls the music generator 119 to supply the reserved music to the subscribers of the CO line, and analyzes the port of the subscriber circuit 114 to check the state of the corresponding extension subscriber. At this time, the exchange control unit 111 controls the tone generator 117 when the corresponding station subscriber is free, outputs a ring back tone to the subscriber line, and outputs the output of the ring generator 115 to the corresponding subscriber line. Connect In this case, the trunk line subscriber is in a state of receiving a ringback tone, and the station subscriber is in a state of supplying a ring signal. Then, when the corresponding station subscriber is hooked off (hook-off), the exchange control unit 111 detects this through the subscriber circuit 114 and controls the switching circuit 113 to connect the port of the corresponding subscriber circuit 114 and the CO line of the trunk line circuit 117. . In this case, the incoming CO line and the corresponding extension line are connected to form a call path.

FIG. 2 is a conventional view of the automatic switching unit 118 shown in FIG. 1, and is disclosed in Patent No. 9783 issued by the present applicant and published on October 22, 1992. FIG. In the conventional automatic switching unit, the serial-to-parallel conversion unit 10, the second buffer 12, the memory unit 20, the address logic unit 40, and the memory enable logic unit 25 each port to record or reproduce the guide voice message in the memory unit 20. I need it very much.

Accordingly, an object of the present invention is to provide an apparatus and method capable of performing an automatic switching function with a simple configuration in an exchange having an automatic switching function.

Another object of the present invention is to provide an automatic switching device and method capable of servicing an automatic switching function for a plurality of channels in an exchange having an automatic switching function.

Another object of the present invention is connected to the exchange control unit to store the voice data received in the specified channel in the recording mode, and to specify the channel to perform the voice guidance in the automatic switching mode to transmit the corresponding voice guidance data and receive the DTMF signal It is to provide an automatic switching device and method that can be converted to the extension number and output to the exchange control unit.

In order to achieve the object of the present invention, an automatic switching device of an exchange for automatically switching a trunk line incoming call to a specific station is connected to a switching circuit, and a serial-to-parallel conversion unit for converting received serial voice data into parallel data, and the parallel conversion. A memory for storing the received voice data as a guide voice message, a DTMF receiver for converting the received DTMF signal connected to the switching circuit into digital data, and converting the parallel voice data outputted from the memory into serial voice data to the switching circuit. An output parallel parallel converting unit, a time division allocating unit for allocating time slots of the serial parallel converting unit and the parallel serial converting unit, an IPC unit connected to an exchange control unit to receive a command for automatic switching, and the memory in recording mode. Controls to convert the voice data to be converted in parallel as a guide voice message, the automatic memo in the conversion mode It is characterized in that it is configured by an automatic switching control unit for controlling the control unit to reproduce and output the guide voice message and to output the received DTMF signal to the exchange control unit as an extension number.

In addition, to achieve the objects of the present invention is provided with an automatic switching device, when the incoming call is received by the exchange control unit switching method to form a call path with the automatic switching device to automatically switch to a specific station is inputted when receiving a recording mode command Converting the serial voice data in parallel to store the guide voice message, converting the stored guide voice message in serial upon output of the automatic switching mode command, and outputting the DTMF signal received after outputting the guide voice message. Detecting the number and outputting the extension number to the switching controller and ending the automatic switching function, wherein the switching controller controls the switching circuit to automatically connect the incoming call line with the telephone line. It features.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The configuration of the exchange according to the present invention has the same configuration as that of FIG. 1 except for the configuration of the automatic switching section 118, and the reference numerals are also the same.

3 is a block diagram of the automatic switching unit 118 according to the present invention. The automatic switching control unit 31 controls the overall operation of the automatic switching unit 118 to perform the automatic switching function. The memory 32 stores the voice data received in the recording mode as a voice message for guiding the automatic switching function under the control of the automatic switching control unit 31, outputs a corresponding voice message for the automatic switching mode, and outputs the program of the automatic switching control unit 31. And service data. The buffer unit 39 is connected to the switching circuit 113. The buffer unit 39 performs a function of inputting and outputting the highway transmitting end X, the highway receiving end R, a clock, an address, and the like of the exchange. In the serial-to-parallel converter 33, an input terminal of the buffer unit 39 is connected to an output terminal of the buffer unit 39. The serial-to-parallel converter 33 converts serial voice data for guiding automatic switching in parallel and outputs the same. The parallel converting unit 34 has an output terminal connected to the buffer unit 39 and serially converts and outputs a parallel type voice message reproduced in the memory 32. The DTMF receiver 36 converts the received DTMF signal into digital data and outputs the extension number to the automatic switching controller 31. The time division assignment unit 38 allocates time slots for time division control of the serial-to-parallel conversion unit 33 and the parallel-to-parallel conversion unit 34 under the control of the automatic switching control unit 31. An IPC unit 37 is connected to the exchange control unit 111 to perform message communication between the exchange control unit 111 and the automatic switching control unit 31. The decoding unit 35 controls the activation of the serial-to-parallel conversion unit 33, the memory 32, the parallel-to-parallel conversion unit 34, the IPC unit 37, the time division allocating unit 38, and the DTMF receiving unit 36 under the control of the automatic switching control unit 31.

Looking at the operation of the automatic switching unit 118 with reference to the above-described configuration, the automatic switching control unit 31 communicates the IPC message with the exchange control unit 111 via the IPC unit 37. At this time, the IPC message type may be messages for initializing, recording, and playing the automatic switching control unit 118.

4 is a diagram showing the detailed configuration of the automatic switching control unit 118 in FIG. The CPU411 is connected to a data bus and an address bus. In the present invention, addresses A0-A20 of the CPU411 are addresses for accessing the memory 32, and addresses A21-A23 are used as addresses for controlling operations of the automatic switching section 118 through the decoding section 35. The latch 412 receives the / EN0 signal and the synchronous clock FSX output from the decoding unit 35 to generate the interrupt signal of the CPU411. The OR gate 414 generates a mode signal for recording voice guidance data by logically combining the / LDS signal and the R / W signal output from the CPU411. The OR gate 415 generates a mode signal for reproducing voice guidance data by logically combining the / LDS signal and the / (R / W) signal inverted through the inverter 416.

FIG. 6 is a diagram showing the detailed configuration of the decoding unit 35 in FIG. In the present invention, two 3 * 8 decoders 611 and 612 are provided to generate an activation signal / EN0-EN7 for selecting the respective components of the automatic switching unit 118. The decoder 611 decodes and outputs the addresses A21 to A23 which are operated when the control signals / LDS and / AS signals output from the CPU411 are activated by the low logic. Here, the decoding result signal output from the decoder 611 is as shown in Table 1 in the state where / LDS = 0 and / AS = 0.

TABLE 1

A23 A22 A21 Activation Signal Remarks

0 0 0 / EN0 CPU interrupt

0 0 1 / EN1 Activate decoder 612

0 1 0 / EN2 Enable IPC message transmission

0 1 1 / EN3 Enable IPC message transmission

1 0 0 / EN4 Enable IPC message reception

1 0 1 / EN5 Enable IPC message reception

1 1 0 / EN6 Ram selection active

1 1 1 / EN7 ROM selection activated

In addition, the decoding result signal output from the decoder 612 is as shown in Table 2 in the state / EN1 = 0, / WR = 0.

TABLE 2

A20 A19 A18 Activation Signal Remarks

0 0 0 / EN10 Activate 1st parallel converter

0 0 1 / EN11 Activate 2nd parallel converter

0 1 0 / EN12 Activate the 3rd parallel converter

0 1 1 / EN13 4th parallel series conversion part activated

1 0 0 / EN14 Activate 5th parallel series conversion unit

1 0 1 / EN15 Activate the 6th parallel serial converter

1 1 0 / EN16 Activate 7th parallel series conversion unit

1 1 1 / EN17 Activate the 8th parallel serial converter

The decoded signals as shown in Tables 1 and 2 perform a function of activating the components of the automatic switching unit 118 to perform the automatic switching function.

FIG. 5 is a diagram showing the detailed configuration of the memory unit 32 in FIG. In FIG. 5, RAM511 is an SRAM, which is a memory that variably records and reproduces a voice announcement message by an operator to perform an automatic switching function of an exchange, and ROM512 is a fixed voice for performing an automatic switching function of an exchange. Memory that stores announcement messages. That is, when operating an exchange that performs an automatic switching function, there are voice guidance messages that are commonly used and voice guidance messages that vary depending on the business name and operation mode used at the place of purchase. Therefore, the ROM512 stores fixed voice announcement messages that can be used at any exchange, and the RAM511 stores variable voice announcement messages for use at the exchange. In addition, an area for storing a program for performing an automatic switching function is allocated to the ROM 512 according to the present invention, and a memory (working memory) area for temporarily storing data generated during program execution is allocated to the RAM 511. .

FIG. 10A illustrates a timing relationship for recording a variable voice guidance message in RAM511 of the memory unit 32. FIG. 10B illustrates a timing relationship for reproducing voice guidance messages recorded in the RAM511 and ROM 512 of the memory unit 32. FIG. It is shown.

First, in the recording process, the CPU411 outputs / LDS, / AS, and R / W signals as low logic signals and sets an address A20-A0 for setting a recording position in the RAM511, and an address A23- for selecting the RAM511. Print A21 as 110. Then, as shown in FIG. 10A, the RAM 511 stores data received at the positions of the addresses A20-Aφ designated during the period in which the / EN6 and the write control signal / WR become low logic. At this time, the data D7-D0 become a variable voice announcement message.

Secondly, the playback process may be performed when the variable voice announcement message of the RAM 511 is played back or when the fixed voice announcement message of the ROM 512 is played back. Referring to the reproduction operation of the variable voice announcement message recorded in the RAM 511, the CPU411 outputs / LDS and / AS as low logic signals, and outputs R / W signals in high logic. The address A20-A0 for setting a recording position in the RAM 511 and the address A23-A21 for selecting the RAM 511 are output to 110. Then, as shown in FIG. 10B, the RAM511 reproduces a message recorded at the positions of the addresses A20-Aφ designated during the period in which the / EN6 and the read control signal / RD become low logic. At this time, the data D7-D0 reproduces the variable voice announcement message recorded in the RAM511. Second, referring to the reproduction operation of the fixed voice announcement message recorded in the ROM 512, the CPU411 outputs / LDS and / AS as low logic signals, and outputs R / W signals in high logic. The address A20-A0 for setting the playback position in the ROM 512 and the address A23-A21 for selecting the ROM 512 are output to 111. Then, as shown in FIG. 10B, the ROM 512 reproduces the message stored at the positions of the addresses A20-Aφ designated during the period in which the / EN7 and the read control signal / RD become low logic. At this time, the data D7-D0 reproduces the fixed voice announcement message stored in the ROM512.

FIG. 7 is a detailed configuration diagram of the IPC unit 37 in FIG. 3, which includes means for delivering an IPC message transmitted from the switching controller 111 to the automatic switching controller 31, and an IPC message sent from the automatic switching controller 31 to the switching controller 111. Consisting of means for delivering, the configuration of these two means having the same form.

First, referring to the configuration of transferring the IPC message generated by the automatic switching controller 31 to the switching controller 111, the inverter 711 inverts the / EN2 signal and outputs the enable terminal of the three-state latch 712. The tri-state latch 712 has an input terminal connected to the data bus D7-D0, an output terminal connected to the data bus SD7-SD0 of the exchange, and an output enable terminal connected to the read control signal / SRD of the exchange control unit 111. The latch 713 has a set terminal connected to / EN2 and a clock terminal connected to / SEN0 output from the exchange control unit 111. The tri-state buffer 714 is connected between the latch 713 and the exchange data bus SD0, and is connected to / SEN1 whose control terminal outputs from the exchange control section 111. Secondly, referring to the configuration in which the IPC message generated by the switch controller 111 is transferred to the automatic switching controller 31, the inverter 721 inverts the write control signal / SWR signal output from the switch controller 11 so that the three-state latch 722 is an enable terminal. Will output The tri-state latch 722 has an input terminal connected to the data bus SD7-SD0 of the switch, an output terminal connected to the data bus D7-D0 of the automatic switching unit 118, and an output enable terminal connected to / EN3. The latch 723 has a set terminal connected to the / SWR signal and a clock terminal connected to the / EN4 signal. The tri-state buffer 724 is connected between the latch 723 and the data bus D0 of the automatic switching control unit 31, and the control terminal is connected to / EN5 output from the automatic switching unit 118.

FIG. 11A shows a timing relationship when the exchange control unit 111 transmits an IPC message to the IPC unit 37. FIG. 11B shows a timing relationship when the automatic switching control unit 31 receives an IPC message transmitted to the IPC unit 37. FIG. It is shown. 11C shows a timing relationship when the automatic switching controller 31 transmits an IPC message to the IPC unit 37. FIG. 11D shows a timing when an IPC message transmitted to the IPC unit 37 is received by the exchange controller 111. FIG. The relationship is shown.

First, referring to FIGS. 11A and 11B, an operation of the automatic switching controller 31 receiving the IPC message transmitted from the exchange controller 111 will be described. The exchange control unit 111 transmits an IPC message as shown in 1112 to the data bus SD7-SD0 of the exchange, and outputs a write control signal / SWR as shown in 1111. Then, the tri-state latch 722 inputs and stores the IPC message carried on the data bus SD7-SD0 of the exchange by the write control signal / SWR. The latch 723 outputs a high logic signal to indicate that the IPC message has been received as indicated by 1113 by the write control signal / SWR.

At this time, the automatic switching controller 31 outputs addresses A23-A21 to generate the / EN5 signal and the / EN4 signal at regular intervals to confirm reception of the IPC message. That is, as shown in Table 1, the A23-A21 outputs 101 and 100 at a predetermined time period to output the / EN5 signal and / EN4. At this time, the / EN5 signal is a signal for the automatic switching controller 31 to read the output of the latch 723 to confirm the reception of the IPC message, and / EN4 is a signal for initializing the output of the latch 723 by the automatic switching controller 31. . Therefore, the automatic switching controller 31 first generates the / EN5 signal and receives the output of the latch 723 to confirm the reception of the IPC message.After the set time has elapsed, the automatic switching controller 31 generates the / EN4 to initialize the latch 723 to the next IPC message. Wait for reception

As shown in FIG. 11B, the automatic switching controller 31 first outputs a low logic signal as shown in FIG. Then, the tri-state buffer 724 connected to D0 of the data bus is enabled, and the output of the latch 723 is applied to the automatic switching control unit 31. Then, the automatic switching controller 31 analyzes the logic state of D0 and checks the reception of the IPC message. At this time, when D0 is a high logic as shown in 1123, the automatic switching controller 31 detects that an IPC message is received and outputs addresses A23-A21 to 11 so as to generate a / EN3 signal as shown in 1124. Then, the decoding unit 35 generates the / EN3 signal as 1124. Then, the tri-state latch 722 is output enabled by the / EN3 signal and outputs the IPC message stored in the data buses D7-D0. Thereafter, the automatic switching controller 31 receives and analyzes the IPC message of the data bus D7-D0 and performs an operation corresponding to the corresponding command. After that, / EN4 is outputted as 1126 to prepare for receiving the next IPC message. Then, the latch 723 having the input terminal connected to the ground terminal receives the / EN4 as the clock terminal, so the latch 723 is initialized to generate an output of low logic.

However, if the D0 data received after outputting the / EN5 signal has a low logic, this means that there is no received IPC message. In this case, the automatic switching control unit 31 does not generate the / EN3, and controls to generate the / EN5 after a set time. Therefore, when the IPC message is not received, the automatic switching controller 31 activates the receiving means of the IPC message, but it can be seen that the read operation of the IPC message is not performed.

Secondly, the waveform diagrams shown in Figs. 11C and 11D are par diagrams showing the operating characteristics of the IPC message output from the automatic switching control section 31 and the exchange control section 111 receiving it. In this case, since the operation will be understood by referring to the operation of outputting the IPC message from the exchange control unit 111 and the automatic switching control unit 31, the description thereof will be omitted.

8 is a diagram showing the detailed configuration of the serial-to-parallel conversion section 33. Inverters 822-823 and AND gate 825 generate the shift clock SRCLK by negative logic summing the clock CLKx and the timeslot designation signal TSφ. The shift register 821 has a serial input terminal connected to the buffer unit 39, receives the output of the AND gate 825 as the shift clock SRCLK, inputs a / SREN signal as an enable signal, and output terminals are connected to the data bus. The serial-to-parallel converter 33 may serve one port regardless of the number of serviceable channels. Therefore, the timeslot designation signal TSφ is fixed to one timeslot of 32 channels. The serial-to-parallel converter 33 converts the variable voice data of the serial form received from the highway in the recording mode into parallel data.

FIG. 13 is a waveform diagram showing a timing relationship in which the serial-to-parallel converter 33 converts serial data received through a highway into parallel data and outputs the same to the data bus. 13 shows an example of using the time slot 0.

Looking at the operation of the serial-to-parallel conversion unit 33 with reference to FIG. Shift serial PCM data to convert to parallel data. When eight shift clocks SRCLK are input, the shift register 821 stores 8-bit parallel data therein. Then, when the shift enable signal / SREN is generated, the serial-to-parallel conversion unit 33 outputs 8-bit parallel data to the data buses D7-D0 and outputs the same to the automatic switching control unit 31. At this time, the automatic switching control unit 31 detects the parallel data received in the recording mode as a guide voice message and controls the memory unit 32 to record the parallel-converted PCM data as described above to the RAM511 as a variable voice guide message.

9 is a diagram showing the detailed configuration of the parallel-to-serial conversion unit 34. The shift register 911 loads parallel data and then serially shifts it to output the serial data. The shift register 911 has an input terminal coupled to a data bus, a clock terminal coupled to the clock CLKX, an INH terminal coupled to a time slot designation signal TS, and an SH terminal coupled to any one of / EN10-EN17 signals output from the decoder 612. do. The tri-state buffer 912 is connected between the output terminal of the shift register 911 and the buffer unit 39, and a control terminal is connected to the timeslot designation signal TS. The tri-state buffer 912 outputs the data serialized in the shift register 911 during the designated timeslot period. The parallel-to-serial conversion unit 34 is provided with a number corresponding to the number of serviceable ports. In the present invention, it is assumed that eight timeslots can be used at the same time. Therefore, eight parallel serial conversion units 34 having the configuration shown in FIG. 9 should be provided.

FIG. 14 is a waveform diagram showing the operating characteristics of the parallel-to-serial converting section 34, which shows a process of converting an 8-bit voice announcement message to be sent out in reproduction mode into serial data and outputting it to the highway. 14 illustrates an example of outputting a voice announcement message to time slot # 0.

Referring to FIG. 14, the operation of outputting the voice guidance message to the highway is described. As for the clock stage of the shift register 911, the clock CLKX as shown in 1412 of FIG. Input as enable signal. The TS is a time slot designation signal for outputting a guide voice message on the highway. Accordingly, as shown in FIG. 14, the shift register 911 serially converts 8-bit parallel data loaded in parallel in the interval in which the timeslot designation signal TS is activated by serially converting the clock CLKX. Accordingly, it can be seen that the data finally outputted through the buffer unit 39 becomes serial 8-bit PCM data in the designated time slot as shown in FIG.

12 shows the types of IPC messages that communicate between the switching control section 111 and the automatic switching control section 31. FIG. Referring to FIG. 12, 1212 is an IPC message which is output from the switching controller 111 to the automatic switching controller 31 for channel assignment (channe1 assign). In the IPC message for channel assignment, 5 bits of the LSB are voice among 32 channels. Data that specifies the channel for recording or playing announcements.

1222 is an IPC message outputted to the automatic switching controller 31 to designate a recording number from the switch 111 at the start of recording in the recording mode. The 6 bits of the LSB are data for setting the recording number. In the present invention, a case where up to 64 voice announcement data can be recorded is taken as an example.

1224 is an IPC message outputted to the switching controller 111 to notify the corresponding port that the automatic switching controller 31 is in the recording mode in the recording mode, and responds to the same IPC message as that of the 1222 transmitted from the switching controller 111.

1226 is an IPC message for notifying the automatic switching controller 31 of the switching controller 111 when the recording mode ends.

1228 is an IPC message outputted from the automatic switching controller 31 to the switching controller 111 upon receiving an IPC message indicating the end of the recording mode, and responds to the same IPC message as that of 1226 transmitted from the switching controller 111.

1232 is an IPC message outputted to the automatic switching control section 31 to designate an output port number for the announcement voice message to be played back by the switching control section 111 in the reproducing mode, and is an IPC message for selecting a parallel serial conversion section 34 to output the voice guidance message. In the IPC message, three bits of the LSB record data for setting a port number.

1234 is an IPC message outputted to the automatic power control unit 31 to set the number of the voice announcement message to be played by the switching controller 111 at the start of playback in the playback mode, and 6 bits of the LSB are voice announcement messages to be played among the recorded voice announcement messages. The data to select. Since the present invention assumes 64 recordable voice announcement messages, it can be seen that 64 voice announcement messages can be reproduced.

1242 is an IPC message outputted to the automatic switching control section 31 when the switching control section 111 wants to stop the playback operation in the playback operation state. The 3-bit data of the LSB becomes a port number to stop playback.

1244 is an IPC message for notifying the switching controller 111 that the automatic switching control section 31 has finished reproducing the corresponding port when the reproduction control IPC message is received by the switching controller 111, and responds to the received IPC message as it is.

1246 denotes an IPC message outputted to the exchange control section 111 by the automatic switching control section 31 to notify the completion of the operation of the regeneration mode when the reproduction is completed, and the 3-bit data of the LSB is the port number of the reproduction completion.

The automatic switching operation performed in the present invention will be described with reference to FIG. 12 and the respective drawings of the present invention.

Referring to the process of recording the guide voice message in the automatic switching unit 118, the exchange control unit 111 outputs an IPC message for performing the recording mode through the IPC unit 37. At this time, the output IPC message sequentially outputs IPC messages such as 1212 and 1222 of FIG. 12. That is, first, when specifying the channel to perform the recording mode outputs the IPC message as shown in 1212, the automatic switching controller 31 checks the channel number in the channel-specific IPC message and outputs it to the time division allocator 38, the time division The assigning unit 38 outputs the timeslot designation signal TS to the serial-to-parallel conversion unit 33 in the designated time slot. In addition, the automatic switching control unit 31, which receives the IPC message of 1222 for starting the recording mode, checks the message number of the voice announcement message to be recorded by analyzing the LSB 6 bits of the IPC message and responds thereto. In order to start recording, the automatic switching controller 31 controls the decoding unit 35 to enable the serial-to-parallel conversion unit 33. At this time, the guide voice data inputted to the highway receiver R is serial 8-bit PCM data.

Then, the serial-to-parallel conversion unit 33 having the configuration as shown in FIG. 8 shifts the serial PCM data by shift clock SRCLK and stores it therein. When eight shift clocks SRCLK are inputted, the serial data is stored as shown in FIG. Convert to 8-bit parallel data. Thereafter, when the / SREN is generated, the serial-to-parallel converter 33 outputs 8-bit parallel data to the data bus. It can be seen that the voice announcement message received in the recording mode is a variable voice announcement message stored in RAM511. Then, the automatic switching control unit 31 detects the 8-bit parallel data received in the recording mode as a voice guidance message and controls the RAM 511 of the memory unit 32 to store the received data in the designated recording number area as a variable voice guidance message. . By repeating the above processes, the voice guidance message is recorded in the memory 32, and the voice guidance message stored in the RAM 511 is a message for performing an automatic switching function.

At the end of recording in the process of storing the variable voice announcement message as described above, the exchange control unit 111 outputs the recording end IPC message as shown in 1226 of FIG. Then, the automatic switching control section 31 ends the recording operation of the automatic switching section 31 by the IPC message, and responds to the exchange control section 111 with the same IPC message as 1226 in FIG.

In the exchange, the subscriber circuit 114 becomes SLC, MSLC, and DLI depending on the type of telephone used by the user at the station. In the recording mode, the user can use the phone as described above to record the desired guide voice message.

In the state in which the guide voice message is recorded in the automatic switching unit 118 as described above, when an incoming call is generated from the trunk line, the switching controller 111 controls the switching circuit 113 to form a communication path between the trunk line circuit 117 and the automatic switching unit 118. In order to output the guidance message for the automatic switching, the automatic switching unit 118 outputs IPC messages for specifying the playback mode. At this time, the IPC message output from the exchange control unit 111 is a channel-specific IPC message as shown in 1212 of FIG. 12, a port-designated IPC message such as 1232 and an IPC message specifying a message number to be reproduced such as 1234.

Looking at the process of reproducing the guide voice message recorded in the automatic switching unit 118, the exchange control unit 111 receives the IPC message such as 1232 for performing the playback mode through the IPC unit 37, and controls the decoding unit 35 The parallel-to-serial conversion unit 34 is activated. When receiving an IPC message such as 1234, the automatic switching control unit 31 reads the voice announcement message corresponding to the corresponding recording number stored in the memory 32 and writes it to the parallel serial conversion unit 34 of the designated port. The parallel-to-serial converting section 34 loads 8-bit parallel data output to the memory 32, converts the parallel voice guidance message into serial data in the period of the time-slot designation signal TS output from the time division allocating section 38, and outputs the highway. Output to phase Accordingly, the parallel-to-serial converting unit 34 serially converts 8-bit parallel data loaded in parallel in the interval in which the timeslot designation signal TS is activated by serially converting the clock CLKx. Accordingly, it can be seen that the data finally output through the buffer unit 39 becomes serial 8-bit PCM data in the designated timeslot. By repeating the above process, when the automatic switching function is performed, the voice message stored in the memory 32 is output on the highway.

When the guide voice message is output on the highway as described above, the voice message is sent to the trunk line subscriber through the switching circuit 113 and the trunk line circuit 117. At this time, when the CO line subscriber listens to the guide message and dials the telephone number of the desired extension subscriber, the dialing number is input to the automatic switching unit 118 through the CO line circuit 117 and the switching circuit 113. The DTMF receiver 36 of the automatic switching unit 118 then converts the DTMF signal into digital data and outputs it to the automatic switching control unit 31. Then, the automatic switching control unit 31 outputs to the exchange control unit 111 through the IPC unit 37. The exchange control section 111 then outputs a regeneration stop IPC message as shown in 1242 in FIG. 12 to the IPC section 37 of the automatic switching section 118. Then, the automatic switching control unit 113 detects the reproduction stop IPC message received through the IPC unit 37, and controls the memory unit 32 and the parallel-serial conversion unit 34 to stop the output of the guide voice message output on the highway. When the automatic switching control section 31 ends the reproduction of the voice announcement message, the automatic switching control section 31 generates an IPC message as shown in 1246 in FIG. 12 and outputs it to the switching control section 111. FIG.

At this time, when transmitting the voice announcement message or when the transmission is completed, the automatic switching mode, the exchange control unit 111 receives the extension number from the automatic switching control unit 31, the exchange control unit 111 is the port state of the corresponding extension subscriber of the subscriber circuit 114 Check it. At this time, if the subscriber of the received extension number is idle, the output of the ring generator 115 is connected to the port of the subscriber to supply the ring signal.When the recipient station hooks off, the switching circuit 113 is controlled to control the switching circuit 113 and the trunk line circuit 117. Form a currency path between them. However, when the subscriber of the received extension number is busy, the tone generator 116 is controlled to supply the busy tone to the trunk line.

FIG. 16 is a flowchart illustrating an operation of transmitting information of a voice announcement message to be recorded to the automatic switching unit 31 in the recording mode in the recording mode according to the present invention.

First, the exchange control unit 111 checks the hookoff of the subscriber telephone through the subscriber circuit 114 in step 1511. At this time, if it detects the hook-off of the subscriber, the exchange control unit 111 controls the tone generator 116 and the switching circuit 113 in step 1513 to supply a dial tone to the subscriber telephone. Thereafter, the exchange control unit 111 checks whether or not the recording key data is input through a DTMF receiver (not shown) in step 1515. If key data other than the recording key data is input, the process proceeds to step 1529 to perform a function on the input key data.

However, if the message recording key input is confirmed in step 1515, the exchange control unit 111 controls the switching circuit 113 in step 1517 to form a call path of the corresponding subscriber port of the subscriber circuit and the automatic switching unit 118. The exchange control unit 111 transmits channel-specific IPC messages and control signals, such as 1212 of FIG. 12, to the IPC unit 37 of the automatic switching unit 118 via the data bus in step 1519. In this case, the channel designation designates all channels based on the channel number of port 0. After outputting the channel-specific IPC message, the exchange control unit 111 outputs an IPC message such as 1222 in FIG. 12 to the IPC unit 37 of the automatic switching unit 118 in step 1521 to designate a recording number to start recording.

In the present invention, an example of storing a total of 64 voice announcement messages, wherein voice announcement messages 0 to 47 are recorded in RAM511 of the memory unit 32 as messages that can be changed as variable voice announcement messages. , It is assumed that the messages 47 to 63 are stored in the ROM 512 of the memory unit 32 as fixed voice announcement messages.

At this time, the automatic switching unit 118 for receiving the IPC message such as 1212 and 1222 determines the receiving port for recording the voice announcement message received by the IPC message of 1212, and receives by the recording number of the IPC message such as 1222 An area is specified in RAM 511 of the memory unit 32 for recording the voice announcement message. Thereafter, the automatic switching unit 38 performs an operation of recording the received voice guidance message in the designated area of the RAM 511 of the memory unit 32.

When the recording completion key data is received from the subscriber switch in the recording mode as described above, the exchange control unit 111 detects this in step 1523, and in step 1525 the IPC message of the automatic switching unit 38 as shown in 1226 of FIG. Send to IPC unit 37. In response to receiving the response of the recording termination IPC message such as 1228, the controller 111 detects this in step 1527 and ends the recording mode and prepares for the next state.

FIG. 15 illustrates an operation process performed by the exchange control unit 111 in the recording mode. In the state where the exchange control unit 111 is operating as described above, the automatic switching control unit 31 of the automatic switching unit 118 performs an operation process as shown in FIG. 16 to perform a recording operation of the voice guidance message.

First, the automatic switching control unit 31 checks the IPC unit 37 at regular intervals to check the reception of the IPC message. In this case, when the data read from the IPC unit 37 is a channel-designated IPC message as shown in 1212 of FIG. 12, the controller 111 allocates a channel of a port to be recorded by controlling the time division allocator 38. After assigning the channel, the automatic switching control unit 31 checks the IPC unit 37 in step 1616 to check whether an IPC message such as 1222 in FIG. 12 indicating the start of the recording mode has been received.

At this time, in the IPC message of 1222, the upper two bits are data for notifying the performance of the recording mode, and the lower six bits are the recording numbers of the voice announcement messages to be recorded. Therefore, when the IPC message for notifying the start of recording is received, the automatic switching control unit 31 stores the recording start address of the memory unit 32 corresponding to the recording number in step 1618 and the IPC message which will be the same as the received IPC message. Is written to the IPC unit 37 to respond that the recording mode is started.

Thereafter, steps 1620 and 1622 are performed to increase the address of the RAM 511 while recording the variable voice guidance message received from the serial-to-parallel converter 33 to the RAM 511. The voice announcement recorded may be one or several consecutive voice prompts. Multiple voice prompts in a row record the silence between each message. The recording mode of the automatic switching unit 118 is repeatedly performed until the recording end IPC message such as 1226 of FIG. 12 is received by the switching control unit 111.

As described above, when the variable voice guidance message received through the highway is converted in parallel and stored in the designated recording number area of the RAM 511, when the completed recording IPC message as shown in 1226 is received, the automatic switching control unit 31 proceeds to step 1622. In step 1624, the recording completion response IPC message as shown in 1228 of FIG. 12 is output to the IPC unit 37. In step 1626, the last address for the last voice announcement message of the current recording number is stored as the recording completion address.

Thereafter, it is checked whether the integrated size of the voice announcement data for the current recording number is within a preset reference size range. That is, when the recorded voice guidance data is a plurality of consecutive voice messages, the silent portion between the message and the message is smaller than the preset reference value. Therefore, when a voice announcement message that falls below the reference value is received, the voice announcement message for the corresponding recording number is stored and initialized. Therefore, the automatic switching control unit 31 leads to the recording start address for the voice announcement message of the current recording number in step 1628 after the recording is completed, and temporarily stores the recording address in step 1630 and then stores the first variable n and the second variable tn. Initialize Here, the first variable n is an address count value, and the second variable tn is a cumulative value of linear values.

In step 1632 and 1634, the automatic switching control unit 31 reads the voice guidance message stored at the position of the RAM 511 designated by the current address, and converts the read voice guidance message into a linear value. In operation 1636, the automatic switching control unit 31 increases the value of the first variable n that accumulates the number of accesses of the voice announcement message, and the current voice announcement message at the second variable tn that accumulates and stores the linear value of the voice announcement message. Accumulate and store linear values of. In operation 1638, it is checked whether the first variable n is equal to or greater than a set value. If the first variable n is less than or equal to the set value, the process proceeds to step 1640 to increase the address by one, and then performs step 1632 again. While repeating the above process, the automatic switching control unit 31 accumulates the linear conversion value of the voice announcement message in the second variable tn until the first variable n reaches a set value.

When the first variable n becomes the set value in the process, the automatic switching control unit 31 checks whether the cumulative value of the second variable tn is greater than a specific value in step 1642.

In this case, when the linear conversion value of the voice announcement message accumulated in the second variable tn is smaller than a specific value, a silent portion is generated in the recorded voice announcement message, and one voice message is terminated. Registers the address saved as the start address of the current voice message. In step 1648, the currently designated address is registered as the end address of the current voice message.

In step 1650, the automatic switching control unit 31 increases the message number in preparation for the next recorded voice message. In step 1652, the automatic switching controller 31 checks whether the current address is greater than or equal to the recording completion address. If the current address is greater than or equal to the recording completion address, the automatic switching control unit 31 ends the recording mode and prepares for the next state.

However, if the cumulative value of the second variable tn is greater than a specific value in step 1642, one voice message continues, so that the automatic switching control unit 31 initializes the first variable n and the second variable tn in step 1644, After returning to step 1640 and increasing the address by one, steps 1632-1640 are repeated.

In addition, when the current address is smaller than the recording completion address in step 1652, an address obtained by adding 1 to the current address is temporarily stored in step 1654, and this address becomes the start address of the voice message corresponding to the increased message number in step 1650. After returning to step 1644 and initializing the first variable n and the second variable tn, steps 1632-1650 are repeated.

Accordingly, as shown in FIGS. 15 and 16, the exchange control unit 111 and the automatic switching control unit 31 exchange IPC messages with each other and record one or a series of variable voice announcement messages in the RAM 511. . At this time, the start and end of the recording is performed while the switching controller 111 controls the automatic switching unit 118 according to the request of the subscriber, and the automatic switching control unit 31 of the automatic switching unit 118 analyzes the IPC message outputted to the switching control unit 111. The variable voice announcement message received from the highway is stored in the RAM 511 of the memory unit 32. At this time, the automatic switching control unit 31 stores a variable voice announcement message, it can be seen that in the case of a plurality of consecutive variable voice messages can be recorded separately for each voice message.

When the recording mode is performed as described above, the RAM 511 of the memory unit 32 stores the variable voice announcement messages received corresponding to the designated recording numbers, and also starts and ends the RAM 511 corresponding to each recording number. It can be seen that the addresses are stored. In addition, the fixed voice announcement messages recorded in the ROM 512 of the memory 32 have stored start addresses and end addresses corresponding to the respective recording numbers.

When the trunk line and the station incoming signal are generated in the state of ending the recording mode as described above, the exchange control unit 111 detects the land line circuit 117 and subscriber circuit 114 the incoming signal. Then, the exchange control unit 111 outputs IPC messages to perform the regeneration mode to the automatic switching unit 118 to output a voice guidance message corresponding to the incoming call, and the automatic switching control unit 31 of the automatic switching unit 118 receives the received IPC message. Analyze the corresponding voice announcement message to play the corresponding port.

17 is a flowchart showing an operation procedure performed by the exchange control unit 111 in the reproduction mode. 17 illustrates an example of a procedure that is performed when an incoming call is generated.

First, when an incoming call is generated from the trunk line, the exchange control unit 111 detects it through the trunk line circuit 117 in step 1711 and then controls the switching circuit 113 in step 1713 to call the corresponding trunk line port of the trunk line circuit 117 and the automatic switching unit 118. Form a furnace. In step 1715, the exchange control unit 111 outputs an IPC message so as to perform a mode for reproducing the recorded voice announcement message. In this case, the exchange control unit 111 outputs an IPC message for selecting a specific parallel-serial conversion unit 34 through a plurality of parallel-to-serial conversion units 34 for transmitting voice guidance data reproduced as shown in 1232 of FIG. An IPC message such as 1634 in FIG. 12 that determines the recording number of the voice announcement message to be outputted to 34 is outputted.

After outputting the IPC messages for performing the playback mode as described above, the automatic switching control unit 31 outputs the voice announcement messages of the recording number assigned to the designated port. In this state, the exchange control unit 111 performs steps 1717 and 1735, and checks whether a reproduction complete IPC message indicating completion of reproduction of the extension telephone number or the designated voice announcement message is received from the automatic switching unit 118. At this time, if the incoming extension telephone number or the IPC message of the completion of reproduction is not received by the automatic switching unit 118, the exchange control unit 111 is in a standby state so as to reproduce the voice guidance message currently being output.

In this case, when the automatic switching unit 118 outputs the IPC message of the incoming extension telephone number, the exchange control unit 111 detects this in step 1717 and automatically switches the playback stop IPC message to stop the voice announcement message currently being serviced in step 1719. Output to IPC section 37 in section 118. The exchange control unit 111 checks the subscriber state of the extension telephone number received through the subscriber circuit 114. In this case, when the subscriber of the extension telephone number is in an idle status, steps 1723 to 1727 are performed to connect the trunk line call with the extension subscriber. That is, the exchange control unit 111 connects the ring generator with the corresponding subscriber port of the subscriber circuit 114 to supply a ring signal, and when the extension subscriber hooks off, it controls the switching circuit 113 to form an incoming call path and ends.

However, when the subscriber of the extension telephone number received in step 1721 is not in a dormant state (for example, a busy state), the exchange control unit 111 may perform steps 1729-1733 because the extension subscriber cannot respond. IPC message is sent to resend voice announcement data to inform CO subscribers of the status. Steps 1729 to 1733 illustrate a process of allowing the automatic switching unit 118 to be connected to the guide telephone number.

In addition, if the extension telephone number generated by the CO line subscriber is not received until the reproduction completion IPC message is received by the automatic switching unit 118, the exchange control unit 111 detects it in step 1735 and performs steps 1737 to 1741. In steps 1737 to 1741, when the CO line subscriber does not dial until the completion of the reproduction of the voice announcement message, the call line is blocked without performing any further call service.

Under the control of the exchange control unit 111 performing the regeneration mode as described above, the automatic switching control unit 311 of the automatic switching unit 118 performs the automatic switching function by guiding voice according to each state in the same process as in FIG.

First, when the exchange control unit 111 outputs the playback start IPC message, the automatic switching control unit 31 detects this in step 1812, and in step 1814 and 1816, the start address of the voice announcement message corresponding to the recording number of the playback start IPC message and After confirming the end address, the start address is set as the current address. The automatic switching control unit 31 reproduces the voice guidance message corresponding to the current address in the memory unit 32 and outputs it to the highway through the parallel serial conversion unit 34 of the designated port. The voice guidance message output to the highway is applied to the trunk line subscriber through the switching circuit 113 and the trunk line circuit 117.

At this time, when the CO line subscriber hears the guide voice message and dials the number of the desired extension subscriber, it is input to the automatic switching unit 118 through the CO line circuit 117 and the switching circuit 113. Then, the DTMF receiver 36 converts the received DTMF signal into digital data and applies it to the automatic switching control unit 31. Then, the automatic switching control unit 31 detects the reception of the dialing data in step 1824, and converts the telephone number of the extension subscriber into an IPC message in step 1826 and outputs it to the exchange control unit 111.

In response, when the exchange control unit 111 outputs the reproduction stop IPC message, the automatic switching control unit 31 detects this in step 1820, deactivates the corresponding parallel-serial conversion unit 34 in step 1822, and simultaneously voices corresponding to the corresponding recording number. The playback operation of the announcement message is stopped.

However, if the dialing data or the playback stop IPC message is not received so that playback of the voice announcement message of the corresponding recording number is terminated, the automatic switching control unit 31 detects this at step 1828, and at step 1832 the playback complete IPC message is exchanged. Output to 111 and exit playback mode.

In the playback mode as described above, the exchange control unit 111 outputs a playback start IPC message so as to reproduce the voice announcement message according to each call state, and the automatic switching unit 118 outputs the voice announcement message of the recording number specified by the exchange control unit 111. Play them and output them to the CO line subscriber. When the voice prompt message is heard and the trunk line subscriber dials the desired telephone number of the extension subscriber, the automatic switching unit 118 converts it to digital data and outputs it to the exchange control unit 111. It stops playback and forms a call path between the CO line subscriber and the station subscriber.

As described above, there is an advantage that the automatic switching service can be performed for multiple ports with one port of memory by using the automatic switching device in the exchange.

Claims (2)

An automatic switching device of an exchange for automatically converting a trunk line incoming call to a specific station, comprising: a serial / parallel conversion unit connected to a switching circuit and converting received serial voice data into parallel data, and a voice message converted from the parallel converted voice data. And a DTMF receiver for converting the DTMF signal received in connection with the switching circuit into digital data, and a parallel serial converter for converting the parallel voice data output from the memory into serial voice data and outputting the serial voice data to the switching circuit. A time division allocating unit for allocating time slots of the serial-to-parallel conversion unit and the parallel-to-parallel conversion unit, an IPC unit connected to an exchange control unit to receive a command for automatic switching, and a voice that is converted in parallel by controlling the memory in recording mode Stores data as a guide voice message, and controls the memory in the automatic switching mode to guide voice message Reproduction output, and automatically switch the receiving device of the exchange, characterized in that consisting of the DTMF signal to the automatic switching control section which outputs to the extension in the switching control section. In a call method of an exchange having an automatic switching device, the switching control unit forms a call path with the automatic switching device when the incoming line incoming incoming call is automatically switched to a specific station, the serial voice data input when the recording mode command is received in parallel conversion Storing the information as a guide voice message, converting the stored guide voice message in serial upon receiving an automatic switching mode command, and detecting the DTMF signal received after outputting the guide voice message as an extension number. And outputting the detected extension number to an exchange control unit and terminating the automatic switching function, wherein the exchange control unit controls a switching circuit to automatically connect a communication path between an incoming trunk line and the station. Automatic switching method of exchange.