KR920002203B1 - Electronic exchange call simulation device - Google Patents

Abstract

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Description

Electronic exchange call simulation device

1 is a block diagram showing the overall configuration of the present invention.

2 is a block diagram of a subscriber line simulation matching circuit.

3 is a control structure diagram of the present invention.

4 is a rack configuration of the present invention.

* Explanation of symbols for the main parts of the drawings

1: time switch 2: tone generator

3: trunk register simulation matching circuit

4: subscriber line simulation matching circuit

5: relay line matching circuit between analogue stations 6: relay line matching circuit between digital stations

7: network controller 8: simulation controller

11: test relay 12: current sink circuit

13 2-wire / 4-wire conversion circuit 14 Filter / Codec circuit

15 tone generator 16: call signal detector

17: polarity reversal detector

18: DTMF / call connection confirmation tone transmission circuit

19: input buffer 20: output buffer

21: Simulation Control Processor

22: subscriber line simulation processor

23: Analytics Trunk Simulator Processor

24: trunk trunk simulator processor

25: Trunk Register Simulator Processor

The present invention relates to an apparatus capable of simulating various subscriber and station relay calls that may occur in an exchange.

The existing test method for verifying the relay function between stations of the electronic switchgear was connected to the outgoing line and the incoming line of the test exchanger to form its own loop and performed the test. However, since the self-loop test is received from the subscriber through the inter-station relay line where the call originates, it cannot be performed in the early stages of the test where the system function is incomplete. It is possible. In addition, due to its own loops, it is difficult to test a variety of realistic relay signals, so when testing the relay function, a simulator that can generate various calls such as the field is required.

In functional tests and system tests, tests should be carried out on all calls that would normally occur in the real environment, as well as on tests that proceed normally. In other words, it should be possible to simulate the normal and abnormal performance procedures of the various inter-station relay signaling methods used for matching with the exchange. Existing simulators generate calls repeatedly according to a certain procedure, so it was impossible to test abnormal performance procedures required for functional tests or system tests. In addition, simulators developed for testing abnormal performance procedures are mostly developed for specific exchanges and cannot be applied to other systems, and it is difficult to control the matching and simulator when connected to the test computer for test automation. Therefore, it was required to develop a simulator that can be repeatedly generated like a real environment for the test automation and the test of the efficient inter-office relay function.

An object of the present invention is to perform the call processing function, which is the core of the exchange function, to automatically generate a call by simulating the relay call type between various subscribers and stations in the most realistic conditions. The present invention provides a call simulation apparatus.

The present invention provides a subscriber line simulation processor for controlling the subscriber line simulation matching circuit, an analog trunk simulator processor for controlling the relay line matching circuit between analog stations, and a digital trunk for controlling the relay line matching circuit between digital stations. A simulator processor, a trunk register simulator processor for controlling a trunk register simulation matching circuit, and a simulation control processor connected to each of the processors to control each of the processors to perform real-time processing and distributed control Doing.

The present invention also provides a subscriber line simulator consisting of a subscriber line simulation matching circuit and a processor for controlling the matching circuit to simulate the subscriber telephone role, an analogue (mechanical and inverting) incoming and outgoing line. An analog trunk trunk simulator consisting of an inter-logo trunk line matching circuit and a processor for controlling the matching circuit, a digital relay line matching circuit for simulating a T1 digital carrier-type trunk line, and a processor for controlling the matching circuit. Trunk simulator, trunk register simulator consisting of a trunk register simulation matching circuit for simulating the sending and receiving of R2 MFC register signal and a processor for controlling the matching circuit, each simula It consists of a network synchronization circuit for supplying the clock signal to the simulation controller, and the simulation controller and the digital trunk simulator for controlling the data.

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

1 is a block diagram showing the overall configuration of the present invention, FIG. 2 is a block diagram of a subscriber line simulation matching circuit among the configurations of the present invention, FIG. 3 is a control structure diagram of the present invention, and FIG. 4 is a rack of the present invention. It is a block diagram.

In the figure, 1 is time switch, 2 is tone generator, 3 is trunk register simulation matching circuit, 4 is subscriber line simulation matching circuit, 5 is relay station matching circuit between analog stations, 6 is relay matching circuit between digital stations, and 7 is network synchronizer. Circuit, 8 is simulation controller, 11 is test relay, 12 is current sink circuit, 13 is 2-wire / 4-wire conversion circuit, 14 is filter / codec circuit, 15 is tone generator, 16 is call signal detector, 17 is polarity reversal. Detector, 18 is DTMF / Call out transmission circuit, 19 is input buffer, 20 is output buffer, 21 is simulation control processor, 22 is subscriber line simulator processor, 23 is analog trunk simulator processor, 24 is digital trunk simulator Processors 25 denote trunk register simulator processors, respectively.

As shown in FIG. 1, the present invention is connected to a test target exchanger, a subscriber line, an inter-logo relay line, and a digital station relay line. ), Digital station trunk line matching circuit 6 and trunk register simulation matching circuit 3. Among the matching circuits, the matching circuits except for the subscriber line simulation matching circuit (4), the tone generator and the time switch are the same as the matching circuits included in the trunk rack of the exchange under test, and each matching circuit controls the matching circuits. And the simulation controller, the upper level processor that controls these processors, are connected by B-bus. The subscriber line simulation matching circuit 4 receives the call using a call signal detector 16 and a block for driving the test relay 11 to transmit hook off, hook on, and hook flash signals as subscriber monitoring signals as shown in FIG. 2. A block for detecting the call signal of the subscriber, a block for detecting the polarity inversion signal using the polarity inversion detector 17, a block 13 for converting the input two wires into four wires for PCM digitization, and an analog voice signal. A filter block 14 for filtering into a voice channel band for PCM digitalization, a codec block 14 for converting an analog voice signal to a PCM digital signal and an analog voice signal, and a DTMF signal as a subscriber selection signal. Block 18 for transmitting and block 18 for transmitting a connection confirmation tone for a call to confirm the normality of the call path, various signals transmitted from the exchange using a tone detector It consists of a block 15 for detecting.

The subscriber line simulation matching circuit 4 is controlled by the subscriber line simulation processor, which outputs data to the DTMF and the call confirmation confirmation block 18 via the output buffer 20 and rings through the input buffer 19. Input data from the detection block 16, the polarity inversion signal detection block 17, and the tone detection block 15 is received and controlled. In this embodiment, the subscriber line that can be connected to the subscriber line simulation matching circuit 4 has 16 lines. to be.

The inter-log relay line matching circuit (5) is a circuit for simulating the analog input (mechanical and inverting) incoming and outgoing lines, and is divided into a circuit for simulating 32 incoming lines and a circuit for simulating 32 outgoing lines. It is. The circuit functions include the transmission and reception of supervisory signals on the relay station, A / D and D / A conversion, 2W / 4W conversion and current sink, and are controlled by the analog trunk simulation processor.

The digital inter-office relay line matching circuit (6) is a circuit for matching between T1 digital carrier relay stations. 1.544 Mb / 2.048 Mb / sec bit rate conversion, Unipolar / Bipolar code conversion, frame synchronization of PCM signals, signaling, frame, alarm It performs functions such as data insertion / extraction and is controlled by the digital trunk simulation processor.

The trunk register simulation matching circuit 3 is a circuit for transmitting and receiving the R2 MFC register signal. It has forward and reverse signals, and the frequency varies depending on the direction, but any one of the six frequencies in the band is synthesized, and 30 signals (15 R2 codes for each of the forward and reverse signals) coded with PCM are embedded. And is transmitted and received by the control of the trunk register simulation processor.

The tone generator 6 is a circuit for generating various exchange beeper sounds, in which ten beeper sounds are incorporated in a digital form, and each beeper is assigned to a fixed channel of the time switch. The trunk register simulation matching circuit and the tone generator can be connected to any channel of the analog station relay line matching circuit 5 and the digital station relay line matching circuit 6 through a time switch controlled by the simulation controller.

The network synchronizer circuit 7 is a circuit for supplying a clock required for stand alone operation of the present invention, and removes the reference clock reception function from the RSS network module of the test target exchanger and replaces the redundant structure with a single structure. Using a single clock divider for a single clock generator, 1.544MHz is supplied to the relay station matching circuit 6 and 2.048MHz to the time switch through the clock cable and 265KHz is supplied to the simulation controller 8 through the T-bus. The simulation controller 8 uses a hardware device such as a T-level processor of a trunk rack of the test target exchange, and has a unitary structure of a redundant structure of the test target exchange for the user to directly control the RS232C line.

FIG. 4 is a block diagram of the present invention. The control structure is designed as a distributed control structure consisting of five Z80 processors as shown in FIG. 3 for real time processing and function distribution. In terms of functional sharing, it consists of four lower-level processors and one higher-level processor responsible for hardware matching. The lower level processors are the subscriber simulator processor 22, the analog trunk simulator processor 23, the digital trunk simulator processor 24, and the trunk register simulator processors 25 for controlling circuitry for sending and receiving R2 codes. It is in charge of the function of detecting a change of state and a signal and sending out a signal.

In addition, the embodiment of the present invention is responsible for the input and output functions in the high-level simulation control processor, and receives the input command of the simulation control command and the simulation program command to check the syntax structure and analyze the meaning, and outputs the contents in case of abnormality do. When the simulator needs to be controlled, it sends an interprocessor communication message to the lower-level processor through the B-bus and outputs the response.

Subscriber line simulator processor 22 acts as the subscriber's telephone to the test exchange. Send out subscriber monitoring signal, decimal pulse and DTMF selection signal. It also detects ring currents sent from the exchange for incoming response and detects various tones to enable simulation of special services. In a busy state, a tone is sent and received to check the status of the call.

The analog trunk simulator processor 23 and the digital trunk simulator processor 24 serve as counter exchanges for the exchange under test. The analog trunk simulator processor 23 transmits and receives a monitoring signal of the relay stations between the analog stations and a selection signal of a loop decadic method. The digital trunk simulator processor 24 transmits and receives the monitoring signal of the North American digital station relay line and the loop decaytic selection signal, monitors various failures of the T1 carrier, and takes care of the processing when the failure occurs.

The trunk register simulator processor 25 is responsible for simulating the R2 MFC selection signal. End-to-end or link-by-link transmission is possible, and R2 codes of forward and reverse signals can be sent and received in a confused manner. In addition, for the pulse method, the transmission and reception of the R2 code can be programmed by a simulation program command to simulate. In FIG. 3, reference numeral 26 denotes an R2 matching circuit. The present invention configured as described above can automatically generate a call by simulating various relays between stations and stations of the exchange, and perform the test by easily connecting the subscriber line with the relay line between the analog and digital stations regardless of which exchange is the test target. can do.

Claims (5)

Subscriber line simulation processor 22 for controlling the subscriber line simulation matching circuit, an analog trunk simulator processor 23 for controlling the inter-logo trunk line matching circuit, and a digital trunk simulator processor for controlling the digital station trunk line matching circuit. 24, a trunk register simulator processor 25 for controlling a trunk register simulation matching circuit, and a simulation control processor 21 connected to each of the processors 22 to 25 to control the processors in real time. And simulation apparatus characterized in that to enable distributed control. The simulation apparatus according to claim 1, wherein the connection between each of the processors (22 to 25) and the simulation control processor (21) is made by B-bus. The simulation apparatus according to claim 1, wherein the five processors (22 to 25) consist of five Z80 processors. An electronic switching symbol simulation apparatus for simulating various subscriber and inter-station relay calls, comprising a subscriber line simulation matching circuit 4 and a processor 21 for controlling the matching circuit 4 to simulate the role of a subscriber telephone. Analyst consisting of a subscriber line simulator, an analogue relay line matching circuit (5) and a processor (23) for controlling the matching circuit (5) for simulating the incoming and outgoing lines of the analogue (mechanical and inverted) type. Log trunk simulator, Digital trunk simulator consisting of a digital inter-station relay line matching circuit (6) and a processor (24) for controlling the matching circuit (6) for simulating T1 digital carrier-to-station relay lines, transmission of R2 MFC register signals Trunk register simulation matching circuit (3) ) And a trunk register simulator comprising a processor 25 for controlling the matching circuit 3, a simulation controller for controlling the respective simulators, and a network synchronizer for supplying a clock signal to the simulation controller and the digital trunk simulator. Simulation device comprising a circuit. The simulation apparatus according to claim 4, wherein a connection between the simulation controller and the network synchronizer circuit is made by T-BUS.

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