KR19980014120A - APPARATUS FOR WRITING AND READING ANNOUNCEMENT MESSAGE IN A SWITCHING SYSTEM - Google Patents

Abstract

The present invention relates to a method of storing and reading out announcement messages in an electronic exchanger, and more particularly, to a flash memory for storing a guidance message and a guidance message read out from the flash memory, The method comprising the steps of: (a) providing a FIFO having a predetermined number of timeslots, and performing a broadcast service of all electronic exchanges using a sub-highway with a predetermined number of time slots, The method comprising: a first step of resetting the FIFO before one time slot time before the start; and a step of sequentially storing in the FIFO a guide message allocated to two time slots from the flash memory during a next one time slot time A guide message allocated to one time slot stored first is read out from the FIFO, Key includes a third step of transmitting a guide message allocated to one latched time slot on the subway during a second step and a next one time slot time and sending out a same time slot time as the third step A fourth step of sequentially storing a guide message allocated to the next two time slots from the flash memory in the FIFO and reading and latching a guide message allocated to one time slot previously stored in the FIFO; If the guide messages allocated to the predetermined number of timeslots are repeatedly stored in the FIFO memory by repeating the third and fourth steps, the guide message applied during the predetermined number of half timeslot times And a fifth step of storing the information message in the flash memory, While performing the service announcement if you store it in memory that can store at the same time, an alert message.

Description

A method for storing and reading out guidance messages in an electronic exchanger

1 is a schematic block diagram of an electronic exchanger including an announcement apparatus;

2 is a block diagram of an announcement window for carrying out the present invention;

3 is a timing diagram for storing / reading guidance messages in the FIFO of FIG. 2 for explaining the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

100, 200: connection switching subsystem 110: subscriber matching section

120: trunk line matching unit 130: time switch

140: local data link 150: announcement device

300: interconnection network subsystem 310, 320: central data link

330: Space switch 400: Central control subsystem

151: key input unit 152:

153: A / D conversion section 154: serial /

155: temporary storage unit 156: guidance message storage unit

157: FIFO 158: P / S conversion unit

159:

[0001] The present invention relates to a method of storing and reading an announcement message in an all-electronic exchanger, and more particularly, it relates to a method of storing an announcement message for informing a caller of a failure of a call connection occurring during call processing in an exchange The present invention relates to a storage and reading out of a guidance message in an electronic exchanger enabling a user to record information while realizing an announcement service in real time.

In general, an electronic switching system has a plurality of distributed access subsystem (ASS) systems, which perform most call processing functions such as subscriber registration, trunk line matching, ) And a central control subsystem (CCS) responsible for operation and maintenance, network management, test measurement and billing, and each connection exchange subsystem or each connection exchange subsystem and central control subsystem And an interconnection network subsystem (INS) that performs node switching, number translation, and relay routing control.

On the other hand, the announcement service in the exchanger serves Fixed Announcement and Mixed Announcement.

The fixed type announcement is a basic voice service of the exchange. It provides a guidance message for informing the caller of the failure occurrence of a call connection occurring during call processing, a message related to a special service such as absence guidance, designated time notification, The announcement is an additional special announcement service provided at the request of the user.

FIG. 1 is a schematic block diagram of an electronic switching system including the fixed broadcast system. Referring to FIG. 1, a plurality of connection switching subsystems 100-200, an interconnection network subsystem 300, a central control subsystem 400 ).

The plurality of connection switching subsystems 100-200 includes a subscriber matching unit 110 to which a plurality of general telephone sets or public telephones are connected and matched and a trunk line matching unit 110 for matching a trunk line The connection and disconnection of the time switch 110 and the time switch and the connection and disconnection between the subscriber matching unit 110 and the trunk line matching unit 120 and the local data link 140 and the announcement apparatus 150, And a time switch 130 for performing an interchange function of time slot (Time Slot) data.

In addition, the local data link 140 performs a high-speed data link over an optical link to connect with the interconnection network subsystem 300, and the announcement device 150 may perform a call processing failure situation, And processes guidance messages related to special services such as designated time notification.

In the connection switching subsystem 100-200 having such a configuration unit, there is an unillustrated upper processor for controlling the constituent units as a whole, and the lower processors in the respective constituent units perform respective functions under the control of an upper processor, The matching with the switch 130 is performed by a PCN (Pulse Code Modulation) sub-highway cable in which a plurality of time-divided time-slot data are contained in one frame sync with a predetermined number of channels.

Particularly, the guide broadcasting apparatus 150 matches the time switch 130 with two time-divided sub-highways each having 64 channels to receive a total of 128 channels to perform the announcement service.

Meanwhile, the interconnection network subsystem 300 performs a connection between all of the connection switching subsystems 100 and 200 connected in the switchboard, performs number translation and trunk line routing, The data link switching module 310 divides the time slot data from the central data link 310-320 through the local data link 140 and the local data link 140 for the optical fiber link, To the local data link 140 .. of the connection switching subsystem 100-200.

The central control subsystem 400 is connected to the interconnected network subsystem 300 and performs functions such as maintenance and billing of the exchange.

Meanwhile, the interconnection network subsystem 300 and the central control subsystem 400 also perform their functions under the control of an unillustrated upper processor, not shown, in the respective components.

The announcement apparatus 150 in the exchange having such a structure reads the related guidance message for the above-mentioned special service to the subscriber's telephone connected to the plurality of subscriber-stations 110 .. in response to the situation, And transmits the voice message to the corresponding subscriber's telephone through the voice mail server 130 .. The subscriber has a function of accepting and storing a voice message from the outside in order to modify or add the message.

On the other hand, when a flash memory is used as a medium for storing a guide message in an announcement device of an exchange, the storage time of the flash memory is longer than the read time. That is, ) Is about 2 microseconds. It takes about 8 microseconds to store a guide message corresponding to one time slot channel amount in the flash memory, so that the user can not perform the announcement service to the subscriber in real time at the same time There was a problem.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for storing and reading a guidance message in a flash memory in a case where an information message is stored and read using a flash memory in a full- And to provide a method of storing and reading the guidance message in the entire electronic exchange that enables the announcement service to be performed.

A method for storing and reading a guidance message in an electronic exchanger according to the present invention includes a flash memory for storing a guidance message and a FIFO for sequentially storing and outputting a guidance message read from the flash memory, A method for performing an announcement service of an electronic exchanger using a time division sub-highway, the method comprising the steps of: before a start of a frame sync signal to which the predetermined number of time slots are allocated, The method comprising: a first step of resetting the FIFO; during a next one time slot, sequentially storing information messages allocated to two time slots from the flash memory in the FIFO and being allocated to a previously stored one time slot A second step of reading and latching the information message in the FIFO, A third step of transmitting, on the sub-highway, a guidance message allocated to one latched time slot during a time period, during the same time slot time as the third step, the next two timeslots from the flash memory A fourth step of sequentially storing the guide message to be allocated in the FIFO and reading out and latching the guide message allocated to one time slot previously stored in the FIFO; and repeating the third and fourth steps, And storing the received guidance message in the flash memory for a predetermined number of half times of the time slot remaining time when all the guidance messages allocated to the time slots of the flash memory are stored in the FIFO.

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

FIG. 2 is a block diagram of an information broadcasting apparatus for carrying out the present invention, which includes a key input unit 151, an announcement control unit 152, an A / D conversion unit 153, a S / P conversion unit 154, A storage unit 155, a guidance message storage unit 156, a FIFO 157, a bottleneck / serial conversion unit 158, and an output unit 159.

In the figure, the key input unit 151 includes a predetermined number of keys including a message number key, a message time key, and the like in order to modify or additionally store a guidance message used in the exchange, And outputs a key signal.

The announcement control unit 152 controls the announcement message and the time recording corresponding to the announcement message number based on the message number key and the message time key signal from the key input unit 151, Based on the guidance service control signal of the mobile communication terminal, the message message and the message time corresponding to the message number, and outputs the same as the message time read to the corresponding channel.

The A / D converter 153 performs PCM modulation on the analog voice signal reproduced from the microphone or the cassette tape under the control of the announcement control unit 152, and outputs the analog voice signal to the digital voice data.

On the other hand, the serial-to-parallel converter 154 converts the digital voice data from the A / D converter 153 into parallel voice data of predetermined bits on the basis of the control from the announcement control unit 152 and outputs the parallel voice data.

The temporary storage unit 155 temporarily stores and reads out the voice data from the serial / parallel conversion unit 154 under the control of the announcement control unit 152. [

The guidance message storage unit 156 stores voice data from the temporary storage unit 155 in correspondence with the message number from the announcement control unit 152 together with the message time, and reads and stores the message data in a flash memory .

On the other hand, the first-in first-out (FIFO) 157 is a first-in first-out apparatus that sequentially stores and reads voice data from the guidance message storage unit 156 under the control of the announcement control unit 152 Output speed difference of the flash memory of the guidance message storage unit 156. [0064]

As described above, the flash memory takes a relatively long time to store voice data of one time slot amount compared with the time to transmit one time slot amount on the sub-highway, and therefore, FIFO 157 is used to enable announcement of broadcasts.

The P / S converter 158 converts the voice data from the FIFO 157 into serial voice data under the control of the announcement control unit 152 and outputs the serial voice data.

Finally, the output unit 159 outputs the voice data from the p / s converter 158 in accordance with the control of the announcement control unit 152 in synchronization with the frame sync signal from the time switch 130 and the reference clock signal And outputs it on the time slot channel.

Next, the guide message storing process in the guide apparatus having the above-described components will be described. The operator inputs the number of the guide message to be stored and the play time of the message using the message number key and the message time of the key input unit 151 do.

Then, a guide message is input through the microphone to the input terminal of the A / D conversion unit 153, or the cassette tape is reproduced to input the guidance message.

Then, the guidance message voice inputted under the control of the announcement control section 152 is modulated into digital voice data in the A / D conversion section 153 and outputted, and the serial / parallel conversion section 154 again outputs the predetermined bit 8 bits) of parallel audio data.

Next, the parallel voice data is temporarily stored in the temporary storage unit 155 under the control of the announcement control unit 152, and is read and applied to the guidance message storage unit 156.

Next, the guide message storage unit 156 stores the parallel voice data from the temporary storage unit 155 at the corresponding position based on the control from the announcement control unit 152, and also stores the parallel voice data from the announcement control unit 152 The message time is also stored together.

Meanwhile, when the guide messages are stored in the guide message storage unit 156 for each type, the exchange transmits the guide message to the corresponding subscriber's phone according to the situation and performs announcement broadcasting. .

First, the announcement control unit 152 reads a guidance message based on the control of an upper processor (not shown). The guidance message control unit 152 controls the guidance message storage unit 156 to read the guidance message.

The FIFO 157 is a first-in first-out (FIFO) apparatus. Since the guide message storage unit 156 is implemented as a flash memory and is characterized by the flash memory, It controls the input / output under the control of the announcement control unit 152 in order to perform the announcement service even when the store operation of the guide message storage unit 156 is performed.

On the other hand, the parallel voice data read out from the FIFO 157 is converted from the parallel / serial converter 158 to the serial voice data, and is then applied to the output unit 159 again.

Next, the output unit 159 outputs the frame sync signal from the time switch 130 and the voice data from the p / s converter 157 on the basis of the reference clock signal to the corresponding The subscribers can listen to the announcement messages to the receiver of the telephone based on the time slot interchange of the time switch 130 by transmitting them to the time switch 130 via the sub highway cable.

On the other hand, when the guide message is read by the guidance message storage unit 156 and the guidance message is simultaneously stored by the operator at the time of the guidance message service, the storage time of the flash memory is relatively longer than one time slot time , And controls the input / output of the FIFO 157.

The FIFO input / output timing diagram of FIG. 3 will be described in detail with respect to the input / output processes of the guidance message storage unit 156 and the FIFO 157. FIG.

The output unit 159 serves two announcement subways (0 channel-63 channel, 64 channel-127 channel) having 64 time slot channels, and the time of one time slot channel is 2 sec.

Conventionally, two channels (0CH, 64CH) for sending data to two subways in one time slot channel time, which was not used in the flash memory, are stored in the FIFO 157 and read out.

However, in the present invention, four channels are stored in the FIFO 157 in one time slot channel time, two channels are read out in the stored order and latched in the output unit 159, and the two channels are read out during the next time slot channel time Through the sub-highways.

Accordingly, it is possible to read out 64 slots in the guide message storage unit 156 during the 32 slots channel time out of the total 64 slots, and store the 64 slots in the FIFO 157 for transmission. 32 占 2 占 퐏 ec) in the guidance message storage unit 156. [0051] FIG.

More specifically, the FIFO 157 is reset before one time slot time from the start of the frame synchronizing signal (64 占 2 占 퐏 ec) from the time switch 130.

Next, during the next one time slot time, the first and second channels CH0, CH64, CH1, and CH65 of the two subways are stored in the FIFO 157, and CH0 and CH64 are read from the FIFO 157 And causes the output section 159 to latch the serial / serial conversion section 15S.

Then, the output unit 159 transmits CHO and CH64 to the two subways at the next one time slot time.

At the same time, the voice data of CH2, CH65, CH3, and CH67 are read and stored in the guidance message storage unit 157 in the FIFO 157, and the CH1 and CH65 stored in the FIFO 157 are read out and output And latches the data in the unit 159.

Then, the output unit 159 transmits the CH1 and CH65 to the time switch 130 after loading the two sub-highways at the second time slot of the sub-highway.

At this time, four CHs (CH2, CH66, CH3, and CH67) are already read out and stored in the guidance message storage unit 157 in the FIFO 157 at the time when two time slots are transmitted.

When 32 time slot times are continuously transmitted in this way, all the voice data to be carried in 64 timeslot times are read out in the guidance message storage unit 157. Therefore, the guidance message to be stored for the remaining 32 timeslot times By storing the guidance message in the guidance message storage unit 157, the guidance message can be stored at the same time as the announcement transmission.

As described above, according to the present invention, when a guidance message used in an electronic exchanger is stored in a flash memory, an announcement message can be stored while simultaneously performing an announcement service.

Claims (1)

A flash memory for storing a guide message, and a FIFO for storing and outputting a guide message read out from the flash memory in a straight line, and using a sub-highway segmented by a predetermined number of time slots, A method for performing an announcement service of an electronic exchange, comprising the steps of: resetting the FIFO one time slot before a start of a frame synchronization signal to which the predetermined number of time slots are allocated; Sequentially storing a guide message allocated to two time slots from the flash memory in the FIFO for one of the following timeslots, reading out and latching a guide message allocated to one stored time slot in the FIFO A third step of transmitting a guide message allocated to one latched time slot on the subway during a second time step and a next one time slot time and transmitting the information message during the same time slot time as the third step; Sequentially storing guide messages allocated to the next two time slots from the flash memory in the FIFO, reading and latching the guidance messages allocated to one time slot previously stored in the FIFO, , A step 4 is repeated to transmit a guidance message allocated to the predetermined number of time slots, And storing the received guidance message in the flash memory for a predetermined number of half times of the time slot remaining when all of the FIFOs are stored in the FIFO memory. .