JPH0439260B2 - - Google Patents

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Application Fields Conventional Technology Problems to be Solved by the Invention Means for Solving Problems Examples of Actions (a) Structure of Examples (b) Examples Effects of the Invention [Summary] The present invention sends out tones to line units by writing tones into a data communication buffer connected to a call processing processor. , for example, the test tone is not stored in the tone generator configured with ROM.

[Industrial application field]

The present invention relates to a tone transmission system in a digital telephone exchange, and particularly in a system equipped with a data communication buffer for data communication between a line processor in a line unit and a call processing processor, a tone generator configured with a ROM is used. This invention relates to a device that reduces the capacity of the device.

[Conventional technology]

Digital telephone exchanges use various tone signals such as a ringing tone, a busy tone, and a test tone. Here, the ringing tone indicates a call from another subscriber, and the busy tone indicates that the dialed party is busy, and is used in general call connection. The test tone is used to check whether the connection is normal when a new subscriber line is connected to the station, such as when a new subscriber or subscriber moves. and is used for special call connections. These tone signals are then sent to a ROM connected to the network 100 of the digital telephone exchange, as shown in FIG.
This is obtained from the PCM code stored in the tone generator 101 configured by the following. The tone signal selected by this tone generator 101 is transmitted to a predetermined line unit 102 via the network 100, and is D/A converted by a codec provided in this line unit 102 to become an analog signal. It will be communicated to subscriber 103.

[Problem that the invention seeks to solve]

By the way, as mentioned above, the tone generator 101 stores various tone signals, including those that are used less frequently, such as test tones, so as the number of types of tones increases, the size of the tone generator 101 has to be increased. I didn't get it.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a tone transmission system that does not contain tone signals such as test tones used for special call connections that are not frequently used on the ROM.

[Means for solving problems]

In order to achieve the above object, in the present invention, as shown in FIG. 1, the line unit 4 and the network are connected by a time division highway, and the line processor LPR for line control in the line unit 4 and the network are It has a data communication buffer 3 for data communication with a call processing processor CPR that performs call connection processing through the network. The line processor LPR is connected to the line processor LPR by connecting the time slot in the highway of the data communication buffer 3 and the time slot in the highway between the line unit 4 and the network on a network. In a digital telephone exchange that performs inter-processor communication between the call processing processors CPR, a tone generator 2 that stores general call tone signals used for general call connection is connected to the network, and is connected to the line unit 4 side. When transmitting the general call tone signal, the call processing processor CPR controls the transmission of a predetermined tone signal from the tone generator 2 to a predetermined call time slot of the highway via the network. , when transmitting a special call tone signal used for a special call connection to the line unit 4 side, the call processing processor CPR stores the special call tone signal data in the data communication buffer 3; The special tone signal data stored in the data communication buffer 3 is controlled to be transmitted to a predetermined time slot of the highway via the network.

[Effect]

Frequently used calling tones, busy tones, etc. are generated by Tone Generator 2, which is made up of ROM.
These normal tones are transmitted to the line unit 4 via the network 1, D/A converted by the codec, and transmitted to the subscriber 5, as in the prior art. When a tone signal that is rarely used, such as a test tone, is required, the call processing processor CPR (not shown)
is also read from the main memory (not shown), written in the communication buffer 3, and sent to the network 1.
It is sent to line unit 4 via.

〔Example〕

(a) Configuration of an Embodiment The configuration of an embodiment of the present invention will be explained based on FIGS. 2 to 4.

FIG. 2 is a configuration diagram of an embodiment of the present invention in the case of 7 highways, FIG. 3 is an explanatory diagram of data states in various memories used in the present invention, and FIG. 4 is an explanatory diagram of the highway configuration in the present invention.

In FIG. 2, the same reference numerals as in FIG. 1 indicate the same parts, and 10 is the speech path memory SPM 11.
is a selector, 12 is a control memory, 13
is a multiplexer, 14 is a demultiplexer, 1
5 is a time slot counter, 16 is a timing generator, 17 is a selector, 18-0
~18-6 is a line unit, 19-0~19-6
are multiplexers, 20-0 to 20-6 are demultiplexers, 21-0 to 21-6 are time slot counters, 22-1 to 22-31 and 2
3-1 to 23-31 are codecs, 24-0 to 2
4-6 is a line processor LPR.

In the present invention, there is a multi-processor system in which functions are shared between a call processing processor that performs the entire switching process and a line processor that is provided in each line unit and that detects changes in the line and exchanges control information with the call processing processor. It has a setsa-style structure.

The tone generator 2 in FIG. 2 can generate, for example, a dial tone or a pidgey tone.
Tone data that is commonly used is stored as binary data and is configured in a ROM.As shown in Figure 3c, tone 0 and tone 1 are 32 bits #0 to #31, respectively. It is stored in 2 categories. Tone 0 is, for example, a dial tone, and tone 1 indicates a busy tone.

The communication buffer 3 connects the call processing processor CPR that controls the network to each of the line processors.
Used as send signal memory SSM to store communication information and maintenance control information to LPR, and receive memory RSM to store communication information and maintenance indications from line processor LPR to call processing processor CPR. However, in the present invention, as will be described later, the send signal memory SSM is also used for sending out infrequently used tones, such as test tones. As shown in FIG. 3a, this SSM or RSM has the same configuration and has frames 0 to 31 divided into time slots for TS0 to TS31. For example, when data is written in the TS0 section of the SSM, this written data is output to the time slot TS0 section of each frame 0-31. Note that this communication buffer 3 is constituted by a buffer group consisting of a plurality of buffers.

The speech path memory 10 is a time division switch constructed of, for example, a static RAM, and the output of the multiplexer 13 is sequentially written as shown in FIG. 3b. This write address is indicated by the count value of time slot counter 15 transmitted via selector 11. This read address of speech path memory 10 is output from control memory 12 and transmitted via selector 11. and control memory 1
The contents of 2 are filled in by a call processing processor CPR (not shown) that controls the network.
In Figure 3b, HW0 is the line unit 18-
HW7 indicates data on highway 0 output from multiplexer 19-0 connected to HW7. In the speech path memory 10, divisions for time slots TS0 to TS31 are provided for each highway.

The selector 11 selects and outputs an address for reading or writing into the speech path memory 10. When writing, the count value of the time slot counter 15 is output, and when reading, the count value from the control memory 12 is output. Output the data.

The control memory 12 contains information for sending up highway information to the down highway, that is, as shown in FIG. 3d, the up highway HW
The communication partners for each time slot TS0 to TS31 of time slots 0 to HW7 are entered. This data is
Filled out by CPR.

The multiplexer 13 converts the eight uplink highways into a set of 8-bit parallel highway format and outputs it to the speech path memory 10.

The demultiplexer 14 expands the 8-bit parallel highway information output from the speech path memory 10 into eight serial highways.

The time slot counter 15 is a counter that outputs a count value for indicating time slots TS0 to TS31.

The timing generator 16 outputs a clock for the time slot counter 15 and the like.

The selector 17 selectively outputs the tone signal from the tone generator 2 or the signal from the SSM as the highway 7.

Line units 18-0 to 18-6 are codecs 22-1 to 22-31...2 connected to subscriber S.
3-1 to 23-31, and lines/processors 24-0 to 24-6 for controlling these codecs. It performs D/A conversion and controls the line units 18-0 to 18-6 by line processors 24-0 to 24-6 provided respectively. Note that each line unit includes the line processor 24.
To hold data for -0...24-6,
A memory (not shown) is provided, and the data of time slot TS0 of each frame is cassetted into this memory.

The multiplexers 19-0...19-6 selectively output uplink data from each codec and line processor in the line units 18-0 to 18-6, and the demultiplexers 20-0 to 20-6 Line unit 18-0~1
8-6, the down highway data sent from the demultiplexer 14 is selectively output to each codec.

Time slot counter 21-0 to 21-
6 controls multiplexers 19-0 to 19-6 and demultiplexers 20-0 to 20-6.

Highways 0 to 7 sent to the multiplexer 13 or sent out from the demultiplexer 14 are
It is constructed as shown in FIG. Here, as shown in Figure 4a, highways 0 to 6 connected to subscriber S side are connected to TS0, which is connected to the
From SSM to line processor LPR in line unit
TS1 to TS31 carry communication signals transmitted from the line processor LPR to the RSM in the network, and TS1 to TS31 carry communication signals transmitted to each codec. . Then, to the highway 7 connected to the selector 7 or RSM side, as shown in FIG. A signal is conveyed.

(b) Operation of the embodiment The operation of Fig. 2 is A, LPR-CPR communication procedure,
B. Tone transmission via SSM; C. Tone transmission
Part 5 about tone transmission using a generator
This will be explained with reference to other figures with reference to FIGS.

A LPR-CPR communication procedure (Figures 5 and 6) Line processor LPR in the line unit and call processing processor CPR on the network side (not shown)
The communication procedure between them is performed according to the flowchart shown in FIG. As a result, for example, the subscriber's dial destination is transmitted from the LPR to the CPR. In this case, as shown in FIG. 6, an example will be explained in which LPR0 (24-0) of line unit 18-0 is used as LPR.

First, set up the network connection. In this case, in order to connect the LPR of the line unit 18-0 and the communication buffer 3, the TS of the SSM is connected to the CM 12.
0 (CH0 in Figure 4b) and HW0's TS0 (downward highway) connection and HW0's TS0 and
Set the data so that RSM's TS0 (uplink highway) can be connected. CPR means:
224 at address 0 (HW0, TS0) of CM12
(HW7, TS0) and set 0 (HW0, TS0) to address 224 (HW7, TS0) of the CM.

Then CPR configures CH0 of SSM.
That is, communication data is written to addresses 0 to 7 of the SSM.

This SSM data is read out based on the count value of TSC15. This SSM read data passes through select 17, MPX13 → SM
10 → DMPX14 → Highway 0 → DMPX0
(20-0)→LPR0 (24-0) route to the line processor 24 of the line unit 18-0.
−0.

The line processor 24-0 reads this data and performs control based on it.

By the way, when subscriber S connected to line unit 18-0 dials, for example,
LPR0 (24-0) reads this and sends out the data.

The data sent from this LPR0 is MPX
0 (19-0) → Highway 0 → MPX13 →
It is set to the RSM of the communication buffer 3 via the path SPM 10 → DMP 14 → RSM.

The CPR reads the communication data from addresses 0 to 7, which is CH0 of this RSM, and performs processing based on this data.

In this way, as shown by the solid line in Figure 6,
LPR-CPR communication will be performed. B,
Tone transmission via SSM (FIG. 7) Next, based on FIG.
A case in which Tone data is sent will be explained.

First, set up the network connection. In this case, in order to connect CH0 of SSM and TS1 (downward highway) of HW0, CPR is 224 (HW7,
TS0).

Then, CPR sets tone data on CH0 of SSM. For example, test tone data is set in all areas (0 to 7) of CH0 of SSM. This test tone data is set, for example, in a main memory (not shown).

The test tone data written in this SSM is read out according to the count value of TSC15. The read data of this SSM passes through the selector 17 as shown by the chain line in FIG.
13 → SPM10 → DMPX14 → Highway 0
→DMPX0 (20-0) →CODEC1 (22-
The signal is transmitted to the codec 22-1 of the line unit 18-0 via the path 1).

In this codec, the PCM test tone data is D/A converted into an analog signal, and a test tone is sent out. The subscriber S side can identify the test state by receiving this.

C Tone transmission using a tone generator (Figures 8 and 9) Like dial tone and busy tone,
Regarding tone transmission using the tone generator 2, based on FIG. 8, the line unit 18-
A case in which tone data is sent to codec 22-1 (CODEC1) of codec 0 will be explained.

Configure network connections. in this case,
The tones to be transmitted, for example, the sections Tone0 and HW0 of the tone generator 2 in FIG.
In order to connect to TS1 (downward highway),
CPR sets 226 (HW7, TS22) to address 1 (HW0, TS1) of CM12.

As a result, the tone data of the tone generator 2 is read out according to the count value of the TSC 15. The read data of the tone generator 2 passes through the selector 17 as shown by the chain line in FIG.
DMPX14 → Highway 0 → DMPX0 (20
-0)→CODEC1 (22-1), the codec 22-0 of the line unit 18-0 is
1.

In this codec, this PCM tone data is D/A converted into an analog signal, and a desired tone is sent to the subscriber S.

In the above example, the highway is 0 to 7, the time slot is 0 to 31, and the tone generator is stored in two types of tones, but of course the present invention is not limited to this.

〔Effect of the invention〕

According to the present invention, frequently used tones are prepared in the tone generator, and less frequently used tones can be written into the communication buffer by the call processing processor for use when necessary. As the number of tones used in processor-based digital telephone exchanges increases, it is not necessary to uneconomically increase the capacity of the tone generator. In this way, in the present invention,
Special call tone signals such as test tones and tone signals that are originally unnecessary as an online function of the exchange
In order to avoid increasing costs by incorporating them into the generator, those that are infrequently used are kept in the main memory and sent out as needed. By the way, the frequently used ringing tone and jibby tone
When the main memory contains tones and other tone signals for general calls, it is necessary to frequently send these tone signals from the main memory to the communication buffer, which places an extremely heavy burden on the call processing processor. Since there is a possibility that normal operations will be disturbed, it is necessary to disperse the items that are used frequently.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 is a configuration diagram of an embodiment of the present invention, and Fig. 3 is a diagram showing communication buffers (SSM, RSM), speech path memory, tone generator, control memory, etc. Explanatory diagram, Figure 4 is a highway explanatory diagram, Figure 5 is
LPR-CPR communication procedure explanatory diagram, Figure 6 is LPR-
An explanatory diagram of the CPR communication path, Fig. 7 is a flowchart for sending out tones via SSM, Fig. 8 is a flowchart for sending out tones using a tone generator, Fig. 9 is an explanatory diagram of tone sending states, and Fig. 10 is a flowchart for sending out tones via SSM. FIG. 2 is an explanatory diagram of a conventional method. DESCRIPTION OF SYMBOLS 1...Network, 2...Tone generator, 3...Communication buffer, 4...Line unit, 5...Subscriber (S), 10...Speech path memory, 11...Selector, 12... ...control memory.

Claims (1)

[Scope of Claims] 1. A line processor LPR for line control in the line unit 4, which connects a line unit 4 and a network via a time division highway, and a call processing processor CPR for performing call connection processing via the network.
The data communication buffer 3 is also connected to the network via a highway, and the line unit 4 has a data communication buffer 3 for data communication with the network.
and a data communication time slot on the highway between the network and the data communication buffer 3.
By connecting the time slots in the highway between the line unit 4 and the network on the network, the line processor LPR and the call processing processor
In a digital telephone exchange that performs interprocessor communication between CPRs, a tone generator 2 that stores general call tone signals used for general call connection is connected to the network, and a tone generator 2 that stores general call tone signals used for general call connection is connected to the network, When transmitting tone signals, the call processing processor
CPR controls sending of a predetermined tone signal from the tone generator 2 via the network to a predetermined call time slot of the highway, and sends a special call signal to the line unit 4 side for use in special call connection. When transmitting the special call tone signal, the call processing processor CPR stores the special call tone signal data in the data communication buffer 3, and transmits the special call tone signal data stored in the data communication buffer 3 to the special call tone signal data. A tone transmission system characterized in that transmission is controlled to a predetermined time slot of the highway via a network.