JPS5897956A - Pseudo automatic originating and terminating type network controller - Google Patents

Abstract

PURPOSE:To test a dialing function and an interface function easily, by providing an automatic dialing device with a testing device which simulates respective signals. CONSTITUTION:An automatic originating and terminating type network controller NCU forms an interface between a subscriber line and a modem to perform originating or terminating operation automatically. A pseudo NCU20, once a data terminal activates a call request signal CRQ, triggers a monostable multivibrator 26 with specified-time delay. The monostable multivibrator 26 generates a following number request signal PND, which is supplied to an automatic dialing device. As a result, dial data is sent out one after another. The signal PND is generated one after another until a signal showing the end appears, so the dialing function and interface function of the automatic dialing device are tested.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pseudo automatic arrival/departure network control device, and more particularly, to a pseudo automatic arrival/departure network control device that is connected to an automatic dialing device to simulate and test interface signals. This invention relates to a pseudo automatic koji call termination type network control device.

In general, when performing data communication using a telephone line, an automatic call/arrival network control unit (hereinafter abbreviated as AA type NCU) automatically performs outgoing or incoming calls through the interaction of data terminal equipment, etc. It is known as something to do.

Fig. 1 shows an AA type NCU which is the background of this invention.

It is a connection system diagram of a strange'all@stomach and a data terminal device. In the figure, an AA type NCL 111 includes an automatic call/receiver control section 11a, a dial pulse sending circuit (PD) 11b, and a plurality of relays. This AA type NCLJ11 is connected to a modem device (MODEM>1) via a 9-pin connector.
Connected to 2. Further, the AA type NCLJ 11 is connected to a data terminal equipment (DTE) 13 via a 25-bin connector. The modem 12 is connected to a data terminal device 13 including an automatic dialing device or the like. In addition, the subscriber telephone line L1゜L2 connected to the dial pulse advance circuit 11
is connected to telephone exchange 114.

By the way, with the AA type NCU as shown in Figure 1, it is necessary to check the interface function.
There was no way to incorporate equipment into the U or easily test it with an external circuit.

Therefore, an object of the present invention is to provide a pseudo-automatic call volume control@stirrup that can test the dialing function or interface function of an automatic dialing device connected to an AATf3NCU, and can be manufactured with a simple configuration and at low cost. That's true.

To summarize, this invention is a signal that delays the edges of a call request signal and a number display signal to create a pulse for opening at a certain time, and uses this as the next number request signal to generate a pulse at the necessary timing. It is.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

#! Figure 2 shows a pseudo AA type NCLI2 according to an embodiment of the present invention.
0 is a block diagram of 0. In the configuration, the end mark @ (hereinafter referred to as EON) detection circuit 21 and the inhibit code detection circuit 22 include dial data DS1. O82, DS4
．． DS8 is input.

These dial data DS1 to DS8 are number data 0 to DS8.
9. The * (star) symbol, # (square), and end sign (EON) are each expressed as a 4-bit code. EON detection circuit 22 and latch circuit 2
Give to 7. The inhibit code detection circuit 22 latches and detects a code that is not allowed as dial data at the trailing edge of the next number request signal, and generates a call abandonment signal. Here, the next number request signal @ (hereinafter referred to as PND signal) is a signal for requesting the data terminal device 13 to send out number data. Indicates that reception is not possible. The call abandonment signal (hereinafter referred to as ACL signal) is a signal for notifying the data terminal device 13 of an abnormality in the calling operation, and when turned on, indicates that an abnormality has occurred in the calling operation.

The NOT circuit 23 has a number display signal 8 (hereinafter referred to as DPR1).
is given. Here, the DPR signal is a signal for displaying the chin while transmitting number data when turned on.

The DPR1i number inverted by the NOT circuit 23 is AN
It is given as one input of the D gate 24. A call request signal (hereinafter referred to as a CRQ signal) is applied to the AND gate 24. Here, the CRQ signal is a signal that requests the AA type NCU 11 to start a paging operation, and when turned on, requests the start of the paging operation, and when turned off, it instructs to start the paging operation. This CRQ signal is derived as a line-in-use indication signal (hereinafter referred to as a DLO signal) to indicate that the AA type NCLJ 11 is in use. AND gate 24 is -
, the logical product of the CRQ signal and the DPR signal to create a rising edge.

The output of the AND gate 24 is delayed by a delay circuit 25,
It is applied to a monostable Mars vibrator (hereinafter referred to as monostable multi) 26. The monostable multi 26 is triggered by a rising edge provided by the delay circuit 25 and generates a pulse of a fixed time.

The output of the monostable multi 26 is sent as a PND signal to the inhibit code detection circuit 22. Provided to latch circuit 7 and data terminal device 13. Here, the PND signal is a signal requesting the data terminal device 13 to send number data, and when turned on, it requests exit of the next number data, and when turned off, it indicates that the system is not ready to receive number data. These NOT circuits 23. AND gate 24. The delay circuit 25 and the monostable multiplexer 26 constitute next number request pulse generating means.

The latch circuit 27 latches the EON detection output in response to the PND signal, and derives a connection completion signal for the 9-bin connector. Here, the connection completion signal (hereinafter referred to as DSC signal) is
This signal indicates that the other party has responded when it is on, and indicates that the other party has not responded when it is off. This DSC signal is 9
Since it is necessary to indicate the connection completion state for each of the bin connector and the 25-bin connector, the case of the 9-bin connector is indicated by the DS09P signal, and the case of the 25-bin connector is indicated by the DSC25P signal. The DSC9P signal is applied as one input to AND gate 28. AND
Gate 28 receives a line connection command signal @ (hereinafter referred to as CML signal)
is given. Here, the CML (If number) is a signal that commands line switching connection, and when turned on, the line is switched to AA type N.
Indicates switching from CU11 to modem @1212 side, and when off, the line is switched from modem 12 to AAW3NCU1
Indicates switching to the 1 side. AND gate 28 is CM
L! Based on the conjunction of i@ and DSC9PI@, D
Derive the SG25P signal. This latch circuit and AN
The D gate 28 constitutes connection completion signal generation means.

Next, the specific operation of this embodiment will be explained.

Data terminal @I! The automatic dialing device included in 13 is 1
When the CRQ signal is turned on during the data transmission period,
The D gate 24 detects the rising edge of the DPR signal and derives a pulse. The output pulse of the AND gate 24 is delayed for a certain period of time by the delay circuit 25 and then triggers the monostable multi-pulse 26. Monostable multi 26 generates a PND signal and provides it to the automatic dialer. Accordingly, the automatic dialing device sends dial data 081 to DS8 and D
Send a PR signal. After that, when the output of the monostable multi 26 is turned off, the PND signal is also turned off, and the DPRI signal is also turned off.

In response to the DPR signal being turned off, the NO king circuit 23 provides its inverted output to the AND gate 24. At this time, if the CRQ signal remains on, the AND gate 26 detects a rising edge and activates the monostable multi 26 again. Such operations are repeated every time dial data is given.

Then, an EON signal is sent at the end of the dial data. In response, the EON detection circuit 21 decodes the EON signal and derives a high-level EON detection signal from its output terminal. This EON detection signal is applied to inhibit code detection circuit 22i and latch circuit 27.

The latch circuit 27 latches the EON signal when the PND signal output from the monostable multi 26 turns off, and
Generate a signal. By deriving this DSC9P signal,
Monostable multi 26 is now disabled.

Therefore, after receiving the EON signal, the PND signal is not derived.

On the other hand, if the dial data DS1 to DS8 include an inhibit code, the inhibit code detection circuit 22 latches this and generates an ACL signal. As a result, the call state between the data terminal device 13 and the AA type NCU 11 is abandoned.

As described above, according to this embodiment, the PND signal is generated with a delay based on the CRQ signal or the DPR signal, so the PNI signals can be automatically output one after another, and the dialing function of an automatic dialing device can be improved. Interface functionality can be tested.

As described above, the present invention provides unique effects such as being able to test the dial function and interface function of an automatic dialing device with a simple circuit configuration and at low cost. Moreover, the pseudo AAW3NCU of this invention is
It can be used to build into W3NCU or connect externally for testing.

[Brief explanation of drawings]

FIG. 1 shows an AAWeNCU that is the background of this invention. Modem, data terminal l1ill! FIG. 2 is a system connection diagram showing the relationship between FIG. FIG. 2 is a block diagram of a pseudo AAINCU 20 according to an embodiment of the present invention. In the figure, 11 is an AA type NCLI, 12 is a modem, 13 is a data terminal, 14 is a telephone exchange, 20 is a pseudo AAveNCLJ, 21 is an EON detection circuit, 22 is an inhibit detection circuit, 23 is a GtNO king circuit, 24 and 28 25 is an AND gate, 25 is a delay circuit, 26 is a monostable multi-channel circuit, and 27 is a latch circuit. Agent Shin Kuzuno - (1 other person)
Figure 1 1A Procedural amendment (spontaneous) Commissioner of the Patent Office 1, 4 (Indication of the matter Patent application Sho! $6-19825
No. 4 No. 2, Name of the invention Pseudo-automatic call/termination type network control t2 shift 3, Person making the amendment 5, Detailed description of the invention in the specification subject to amendment 6, Contents of the amendment (1) Page 2 of the specification Correct "dial pulse output circuit 11" in line 14 to "line protection side 1." (2) Change "dial pulse output circuit 11" in lines 1 to 2 of page 3 of the specification to "line protection device 11b." Correct. that's all

Claims (1)

[Scope of Claims] An automatic dialing/receiving controller connected to an automatic dialing device connected to the automatic dialing/receiving network control unit @stomach, and for simulating and testing each signal. A pseudo-automatic decentralized network control device comprising: a next number request pulse generating means for generating a next number request pulse in response to a paging request signal and a number display signal; and dialing data in synchronization with the next number request pulse. call abandonment signal generation means for reading the dialing data and generating a call abandonment signal based on the dialing data; and a connection completion signal generating means for reading the dialing data in synchronization with the next number request pulse and generating a connection completion signal based on the dialing data. Pseudo-automatic departure/arrival network control equipment equipped with means.