KR0136770B1 - Voice service equipment in a switching - Google Patents

Abstract

The present invention relates to a multi-channel voice service apparatus in a private electronic switch, and more particularly, to allow a single voice storage memory to send different messages to 32 or more subscribers.

The prior art has a problem in that the capacity of the highway is limited to 32 subscriber channels because 32 voice channels can be supported to one voice service device. Also, to service more than 32 subscribers, the same voice service device may be used. Since it must be provided in plural, there was a problem that unnecessary memory is wasted.

Accordingly, the present invention is to configure a multi-channel voice service device that can expand the subscriber channel by enabling different voice services to 32 or more subscribers with one voice service device.

Description

Multichannel Voice Service Unit of Private Electronic Switch

1 is a circuit block diagram of a conventional voice service apparatus.

2 is a circuit block diagram of a voice service apparatus according to the present invention.

3 is an operation timing diagram of each part of the present invention.

* Description of the symbols for the main parts of the drawings *

10: central control circuit 20: channel designator

30: Voice storage memory 40, 41: Temporary memory

50, 51: parallel / serial data converter 60, 62: PCM highway matching

HW0, HW1: Highway

The present invention relates to a multi-channel voice service apparatus in a private electronic switchboard, and more particularly, to be able to send different messages to more than 32 subscribers in one voice storage memory.

The conventional voice service apparatus includes a central control circuit 10, a channel designator 20, a voice storage memory 30, a temporary memory 40, and a parallel / serial data converter 50 as shown in FIG. PCM (Pulse Code Modulation) highway matching unit 60, in this configuration, the program in the central control circuit 10 is stored in the voice storage memory 30 to a specific subscriber channel (one highway includes 32 subscriber channels) If it is determined that the voice data needs to be sent), the program sends the channel number of the particular subscriber to the channel designator 20 together with the start address of the voice data.

Therefore, the channel designator 20 receives the previous channel number and the start address, and the voice at a specific start address of the voice storage memory at an appropriate time (32 highway channels are shared in a time-sharing manner with one highway) according to the channel number. Access the data.

At this time, when accessing the data, the temporary memory 40 stores 8-bit (1 byte) data taken from a specific start address, and the parallel / serial data converter 50 receives the channel designator 20 and the synchronous clock. ) Sends the data entered into the temporary memory to the PCM highway matching unit 60 one by one from the most significant bit.

Here, if the channel designator 20 and the parallel / serial data converter 50 are not synchronized, it is impossible to know whether 8 data are sent correctly from the most significant bit or 8 data are rotated from the middle bit. Motivation must be achieved.

The PCM highway matching unit 60 serves to carry the serial data coming from the parallel / serial data converter 50 to the highway under the control of the channel designator, thus carrying one byte on the highway and then again. When the same channel time zone is returned, a series of voice services are realized by accessing the address next to the address already accessed by the channel designator 20.

However, in the prior art as described above, it is possible to support 32 or fewer subscribers in one voice service device. Therefore, when any subscriber starts a call, the advantage of hearing from the beginning rather than the middle of the message is that the capacity of the highway is 32. There is a problem that is limited to the subscriber channel and also because the same voice service device must be provided in plural in order to service more than 32 subscribers for the same reason, there is a problem that unnecessary memory is wasted, and the voice service memory is the same when there are multiple voice service devices. There is a problem that it becomes difficult to version the voice data because the need to be required.

Accordingly, an object of the present invention is to provide a multi-channel voice service apparatus that can expand a subscriber channel by enabling different voice services to 32 or more subscribers with one voice service apparatus.

The present invention for achieving this object is the central control circuit 10 responsible for the overall control for the voice service, as shown in Figure 2 and the voice storage memory 30 under the control of the central control circuit 10 A channel designator 20 for carrying the voice in each subscriber channel, a voice storage memory 30 for designating the actual voice digitally, and periodically storing data output from the voice storage memory by a clock. A first parallel / serial data converter 50 for converting the first temporary memory 40 and the parallel data output from the first temporary memory into serial data by a combination of three clocks of 1M, 512K, and 256 kHz, and serial data A first PCM highway matching unit 60 passing through the corresponding subscriber channel of the first highway HW0, a second temporary memory 41 periodically storing data output from the voice storage memory 30 in a clock; 2nd A second parallel / serial data converter 51 for converting parallel data output from the time memory 41 into serial data by a combination of three clocks of 1M, 512K, and 256 kHz; and a second parallel / serial data converter 51; It consists of a second PCM highway matching unit 61 that carries the serial data output from the channel to the subscriber of the second highway (HW1).

Referring to the operation and effects of the present invention configured as described above are as follows.

First, a program in the central control circuit 10 must send voice data in the voice storage memory 30 to a particular subscriber channel (where one highway means a specific time zone above one highway because it includes 32 subscriber channels). If it is determined that it needs to be, the program in the central control circuit 10 sends the channel number of the particular subscriber with the start address of the voice data to the channel designator 20.

Accordingly, the channel designator 20 receives the previous channel number and the start address, and sets the respective time zones by the clocks of 1M, 512K, and 256 kHz, as shown in FIG. The voice data at a specific start address of the voice storage memory is accessed at the corresponding channel time among the 32 subscriber channels (D) coexisting with each other.

When the data is accessed in this way, the voice storage memory 30 sends the data to the first temporary memory 40 or the second temporary memory 41, and the temporary memory 40, 41 and the parallel / serial data, respectively. After converting the serial data via the converters 50 and 51, the PCM highway matching unit 60 and 61 are transferred to the first PCM highway matching unit 60 under the control of the channel designator 20. Or it is transmitted to the first or second highway (HW0) (HW1) through the second PCM highway matching unit 61.

The process of transferring data from the voice storage memory 30, which is an essential part of the present invention, to the first temporary memory 40 or the second temporary memory 41 is, for example, channel designation as shown in FIG. Assuming that the machine 20 receives a command from the central control circuit 10 to send specific data to the subscriber channel CH0 of the first highway HW0, the above situation occurs when a highway frame header of 3 kHz is generated and 1M is generated. , Which means that the first bit of the 8 bits of the specific voice data is loaded to the first highway (HW0) when the clocks of 512K and 256kHz all fall to logic low, and the commanded channel from the central control circuit 10 is designated. As shown in FIG. 3 (Difference), the voice 20 stores the voice header memory 30 at a short time before the 8kHz highway header is generated and the clocks of 1A, 512K, and 256kHz in (a) become all logic low. Required address (as shown in FIG. Access the data of the way) with little time difference will be transferred towards the first temporary memory 40 and the second temporary memory (41).

However, the data at this time is data generated when the first temporary memory 40 becomes active as shown in (f) (in this case, the channel designator is b) in FIG. 3) and f). Intentionally accessing data at a time just before the first temporary memory is activated), which is stored only in the first temporary memory 40 and at the same time the parallel / serial data converter 50 is a combination of 1M, 512K and 256kHz. Therefore, 8 bits of parallel data are converted into serial data and sent to the first highway HW0 from the most significant bit when they are all logic low to the most significant bit when they are all logic high.

On the other hand, assuming that a command is received from the central control circuit 10 to send specific data to the subscriber channel CH0 of the second highway HW1, the channel designator 2 generates an 8kHz highway frame header (car). At a short time after the clocks of 1M, 512K, and 256 kHz were all low, the required address of the voice storage memory 30 (the corresponding data of the second highway (HW1) as shown in Fig. 4) was accessed, and there was almost no time difference. Transfers to the first temporary memory 40 and the second temporary memory 41.

However, the data at this time is data generated when the second temporary memory 41 becomes active as shown in the drawing (A) (the channel designator is (a), b) of FIG. 3) and a) Intentionally, the data is intentionally accessed just before the second temporary memory is activated. Only the second temporary memory 41 is stored, and the stored data enters the time zone of the next subscriber channel CH1. The parallel / serial data converter 51 converts 8-bit parallel data into serial data from the most significant bit when all are low to the least significant bit when all are high in the combination of 1M, 512K, and 256 kHz, and the second highway (HW1). In this case, the first and second PCM highway matching units G0 and G1 are controlled by the channel designator to block or pass data entering the highway. This prevents unnecessary data from parallel / serial data converters 50 and 51, which continuously send data, into the subscriber channel.

As described above, since one subscriber channel time is divided into two to access data, two highways, that is, 64 different subscriber channels can carry different messages, so accessing data four times in one subscriber channel time results in 128 subscriber channels. You will also be able to send different messages.

As described above, the present invention can provide different voice services to 64 or 128 subscribers even with one voice service device, so that there are several voice service devices having only 32 independent channels. It is economical because there is no need to do it, and there is no need to manage several same voice service memories, so that voice data can be easily managed.

Claims (1)

Under the control of the central control circuit 10, the service voice data in the voice storage memory 30 is accessed by the channel designator 20 and stored in the first temporary memory 40, and then the first parallel / serial data converter. A voice service apparatus configured to serialize the data to 50 and transmit the same to the subscriber channel through the first PCM highway matching unit 60, the second service periodically storing data from the voice storage memory 30 by a clock; Temporary memory 41, A second parallel / serial data converter 51 for converting the parallel data output from the second temporary memory 41 into serial data by three clock combinations of 1M, 512K, and 256kHz; And a second PCM highway matching unit 61 which carries the serial data output from the second parallel / serial data converter 51 to the corresponding subscriber channel of the second highway HW1 by the channel designator 20. Multi-channel voice service device of the private electronic switch characterized in that the configuration.