JPS606583B2 - pseudo call device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pseudo call device having an incoming call terminal function circuit and means for confirming a train on the switching device side.

The imitation call system is used to test the equipment stability of the exchange under test before it is opened.It generates call conditions such as simultaneous activation and simultaneous transmission of selected digits for the exchange under test. For example, it is known to check for conflicting operations in sending registers, markers, etc.).

Furthermore, as the range of exchanges under test expanded to include electronic exchanges rather than crossbar exchanges, the unique conditions of the exchange under test required the use of similar calling devices (Special Publications 1973-
No. 19892, "Test Call Generator") has been developed and put into practical use. As a feature of the electronic castration machine, each connection process (
For example, the train (receiving called party selection signal, receiving ring tone, mutual communication, etc.) is different, and the same pseudo call test method as in conventional crossbar exchanges and step-by-step exchanges is not sufficient. In order to do this, an incoming terminal function circuit is provided, and a response signal is sent from the called side to the train at the time of response, and this signal is received and detected on the outgoing terminal function circuit side, thereby establishing the connection on the side of the interchange machine under test. It is well known that a pseudo-call device that knows what is normal is used.

Currently, in the commonly used analog calling devices with incoming terminal function circuits, the outgoing terminal function circuit and the incoming terminal function circuit are configured as a pair, and when using the incoming terminal function circuit, they are always paired. There is a usage restriction that requires connection to the subscriber terminal of the exchange machine corresponding to the sending number of the sending terminal function circuit.

After all, it is a means for facilitating recovery and disconnection control of the incoming terminal functional circuit.

That is, the operation of receiving a call from the exchange side to the incoming terminal function circuit is performed under the control of the exchange under test. Thus, the response and the sending of the response signal are controlled by the originating terminal side of the mimic calling device. The reason for this is that even if the incoming terminal function circuit ignores the state of the outgoing terminal function circuit and responds to the call from the exchange calculator and sends out a response signal, the outgoing terminal function circuit side In some cases, the means for receiving and detecting the response signal may not have been completed yet, and furthermore, if the process of changing the train connection on the exchange under test is delayed due to waiting etc., the response signal may not be sent to the transmitting terminal function circuit. has not arrived yet.

On the other hand, the response signal detection completion state in the transmission terminal function circuit is
It is difficult to determine this on the incoming terminal functional circuit side, and it is unreasonable that it is impossible to determine when to end sending out the response signal. For this reason, conventionally, this unreasonableness has been solved by using an outgoing terminal functional circuit and an incoming terminal functional circuit in correspondence, and by operating the incoming terminal functional circuit in synchronization with the operation of the outgoing terminal functional circuit. However, with conventional similar call equipment, this is not a problem when there are only a few circuits for outgoing and incoming terminal functions, but when the number of circuits increases, it can easily become unreasonable and difficult to handle during setup. I can understand it.

The conventional method will be explained in detail with reference to FIG.

FIG. 1 shows a block diagram of a conventionally commonly used analog calling device with a train confirmation function, in which 1 is the analog calling device, 2 is the telephone exchange under test, and 101 is an outgoing terminal function circuit (hereinafter referred to as OTL). ), 102 is the incoming terminal function circuit (
(hereinafter referred to as TTL), 103 is a control circuit (hereinafter referred to as CON
104 is a signal receiving circuit (hereinafter referred to as REC), 105 is a pulse sending circuit (hereinafter referred to as OS), and 106 is a response signal sending circuit (hereinafter referred to as ATOSC).
are shown respectively.

OTLIOI and TTLI02 are used in correspondence,
TTLI02 is connected to the receiving subscriber terminal corresponding to the subscriber number sent from OTLI OI.

In this way, when the originating side OTL of the pseudo call device 1 is connected to the switching device 2 and the pseudo call device is started, the CONTI
03 operates and gives a startup instruction to OTLI OI,
Therefore, OTLIOI creates a loop for exchange device 2.

Therefore, the switching device 2 detects the call, connects the call to the empty calling register, and sends a dial tone from the calling register to the calling subscriber. A dial tone is received via OTLIOI and detected by RECI04.

This detection result is transmitted to CONTI03. CONTI0
3 scans and detects this, and upon learning that it is now ready to receive the selected digits, the switching device 2 immediately activates the switching circuit i07 to prepare for sending the selected digits, and CON the called party numbers in sequence.
Under the control of TI03, the selected number is sent from OSI05. This group of selected digits is counted and accumulated in the calling register of the switching device 2, and when all digits are received, a busy test is immediately performed for the called subscriber, and if it is empty, a calling signal is immediately sent to the called subscriber. Send out. On the other hand, a ringing tone is sent to the calling subscriber side to indicate that the called subscriber is being called. The called subscriber terminal is connected to the analog calling device 1 in advance as described above.
TTLI 02 is connected, and when it receives the paging signal, it detects it and makes it responsive to the exchange.
This is detected by the calling signal sending circuit of the switching device 2, and the OTL
Both subscriber terminals of i o l and TTLI02 are interconnected via an intra-office trunk.

For this reason, the response signal of ATOSCI06 is sent via TTLI02, and this signal is input to TLIOI via the trunk within the eye station.

On the other hand, when CONTI03 completes sending all digits from OSI05, it switches SWI07 and sends R to OTLIOI.
ECI04 is connected and ready to receive response signals from the exchange equipment side. Therefore, as soon as the response signal sent from the TTLI 02 side is completed, the RECI 04 receives the response signal and the CONTI 03 identifies the detection result as the response signal. In order to do so, the OTLIOI disconnects the outgoing loop to the switching device 2, puts it in an on-hook state, restores the trunk connection train within its own office on the switching device 2 side, and disconnects the circuit of the TTLI02. At this time, under the control of CONTI03, the TTLI02 releases the response state in synchronization with the recovery of the OTLIOI, and enters the call waiting state, that is, the empty state. In the above explanation, the test line is used as one line, and the connection processes of general super call, sending selected digits, ringing, answering, talking, and disconnection to the pair switching device 2 are described. will be fully understood.

Therefore, actual replica call equipment is equipped with multiple test lines, and generates call states such as simultaneous activation and simultaneous selection to check the normality of the priority selection circuit within the switching layer 2. Verification is well known.

As is clear from the above explanation, the OTLI of the similar call device 1
OI and TTLI02 are associated and controlled. If this criterion is ignored, the operation will be disrupted.
For example, "During the recovery process mentioned above, TTLI02
If the response state is not released by NTI03, the loop state will continue based on the response state rule for the switching equipment 2 side, so when the call train is disconnected, the subscriber circuit of the switching equipment 2 will be activated due to the loop. and connect TTLI02 to the outgoing register.

Otherwise, the device becomes locked out and becomes busy for the next call, impairing the normality of the test. That is, the target exchange device 2 is very wide and has step/di step,
Crossbars, electronic switching equipment, and many models made in other countries are connected to trunk trains within their own office, while subscriber call detection circuits are connected,
It is very difficult to judge each of the connected transmitter registers independently, and it is easy to understand that it is desirable to associate OTLI O I and TTLI 0 2 and operate them under the control of CONTI03. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a similar call device that solves the above-mentioned conventional drawbacks.

The imitation call device of the present invention is provided with a calling terminal identification signal sending means for displaying the calling side and a means for receiving and detecting a response confirmation signal from the receiving terminal functional circuit in the calling terminal functional circuit. , a means for receiving and detecting the outgoing terminal identification signal and a response confirmation bond sending means for indicating that the call has been received are provided, and when the incoming terminal function circuit receives a call and sends out the response confirmation signal, the outgoing terminal identification signal is received. If the response confirmation signal sent by the incoming terminal function circuit side is received and identified by the outgoing terminal function circuit side, it will self-recover after a sufficient period of time has elapsed, and if the outgoing terminal identification signal cannot be received, the response confirmation signal sent by the incoming terminal function circuit side will self-recover. It is characterized by having a self-control function that self-recovers after a certain period of time.

Further, in the imitation call device of the present invention, the calling state function circuit is provided with means for transmitting a calling terminal identification signal for displaying the calling party and means for receiving and detecting a response confirmation signal from the receiving terminal function circuit, The circuit is provided with a means for receiving and detecting the outgoing terminal identification signal and a means for sending out a response confirmation signal to indicate that the call has arrived, and the response confirmation signal sent out from the incoming terminal functional circuit when the call is received at the incoming terminal functional circuit is transmitted to the outgoing terminal. If the incoming terminal function circuit receives the outgoing terminal identification signal that is received by the outgoing terminal function circuit and sent out from the outgoing terminal function circuit, it will self-recover immediately, and if the outgoing terminal identification signal cannot be received, it will recover after a certain period of time. It is characterized by having a self-control function of self-recovery.

Hereinafter, specific embodiments of the present invention will be described using FIGS. 2 to 4.

The functional blocks of the present invention will be explained with reference to FIG.
Specific examples of each block related to the present invention are shown in Figures 3 and 4.
This will be explained in detail using figures.

FIG. 2 shows a block diagram of a similar calling device according to the present invention,
1 is a pseudo call device, 2 is a switching device under test, 101 is an outgoing terminal function circuit (hereinafter referred to as OTL), 102 is a terminating terminal function circuit (hereinafter referred to as TTL), 103 is a control circuit (hereinafter referred to as CONT), 104 is a signal receiving circuit (hereinafter referred to as RE
105 is a pulse sending circuit (hereinafter referred to as OS), 106 is a response signal sending circuit (hereinafter referred to as ATOSC), 107 is a switching circuit (hereinafter referred to as SW), 108-
1 and 108-2 are selection circuits, 109 is a hybrid circuit (hereinafter referred to as HYB), and 110' is an OTL connection confirmation circuit (hereinafter referred to as OET). Each block 101 to 108-2 in FIG. 2 has substantially the same function as 101 to 108-2 in FIG.

The major difference from Figure 1 is that TTLI02 has a self-control function, so there is no need to associate it with OTLIOI.
Incoming subscriber terminals can be accommodated freely. As a result, the originating terminal to TTLI02 may be its own pseudo call device or may be another pseudo call device. The calling state, the selection signal sending state, and the receiving device calling state are the same as those described in the conventional operation explanation of FIG. 1, and will therefore be omitted.

TTLI 02 receives the paging signal from switching device 2, and if it continues for a certain period of time, it determines that the call has arrived, puts the switching device 2 in a response state (off-hook state for creating a loop), and sends A
A response signal for train confirmation is sent from TOSCI06.

Switching equipment 2 learns of the response from TTLI 02 and stops sending out the paging signal, and also transmits OTLIOI via its own internal trunk.
Connect to.

On the other hand, OTLI OI sends the called subscriber selection number from OSI 05 to switching equipment 2 under the control of CONTI 03, and when the sending of the selection number is completed, 061 05
A transmitting terminal identification signal is sent to ○TLI O I via HYBI O9.

Of course, it goes without saying that SWI07 is restored upon completion of sending the selection number. Therefore, when the train is completed on the exchange device 2 side in response to the response from TTLI02, the transmission terminal identification signal is transmitted from OTLI O I to TTLI 02.
Response confirmation signals are transmitted and received from the TTLI02 to the OTLI OI, respectively.

As a result, DETI10 receives the transmitting terminal identification signal from OTLIOI, and for a certain period of time (this certain period of time is
04), the OTLI
The response state is released regardless of the state of the 01 side, and the handset is put on the hook for the exchange device 2 side. In the above explanation, TTL
The case where the train is completed in switching device 2 after I02 response is shown is shown, but if the train cannot be completed due to link mismatch etc., TTLI02 operates the overall timing after detecting the paging signal, and when the corresponding time is reached, OTLIO is executed.
It has a self-control function that automatically releases the response state and answers the next call even if it does not receive the calling terminal identification signal from I.

In this way, in a similar call device having a communication path confirmation function, a calling terminal identification signal sending means for displaying the calling party is provided in the calling terminal function circuit (for example, 101), and A means (for example, 110) for receiving and detecting a transmitting terminal identification signal is provided, and if the transmitting terminal identifying signal is received when the receiving terminal function circuit receives a call and responds, the circuit automatically recovers after a certain period of time or immediately; If the calling terminal identification signal cannot be received, the call device self-recovers after a certain period of time longer than the above-mentioned time period, thereby providing a similar call device that is easier to handle than the conventional system.

Hereinafter, the operation of a specific embodiment will be explained in detail with reference to FIGS. 3 and 4.

3 and 4 show the individual circuit configurations shown in the block diagram of FIG. 2 according to the present invention, with FIG. 3 showing the calling side and FIG. 4 showing the receiving side, respectively.

Note that the control circuit CONTI03 shown in FIG. 2 may be a generally known wiring logic or program control, and is not a mechanical function of the present invention, so a detailed circuit is omitted. For the calling operation, relay A of OTLI O I is activated by CONTI 03 and the relay contact ao is closed, so a loop circuit is closed to the subscriber terminal of switching device 2, and switching device 2 detects the calling. and connect the line to the empty call register,
The transmission blue signal is sent from the transmission register.

On the other hand, CONTI03 connects the OTLIOI circuit to RECI04 by operating the gate relay G of the selection circuit 108-1 and closing the relay contacts g0 and g1. The selection circuit 108 performs selection between RECI04, which is provided in common for multiple OTLs, and one selection circuit is closed at the same time, so RECI04 is connected to one OTL at the same time.
Connected to IOI. Therefore, the aforementioned dial tone is OTLI
Pass through OI, select circuit 1 08-1, HYB circuit 1 0
received at RECI 04 via signal receiver TRE.
When C operates, INV (called an inverting circuit or a transistor NOT circuit) is a circuit in which the output becomes "0" when "1" is given to the input, and the output becomes "1" when 0 is given to the input. ) to drive relay TD. By opening the relay contact o, CONTI03 learns that the calling line has been connected to the calling register at the exchange 2, and proceeds to send the selected digits. First, CONTI03 sends an operation signal to SWI07 to operate relay S, and this
Relay S operates by receiving at 07, and contacts so,
sl operates and selects a number sending circuit 108- to OTLIOI.
2, and then from CONTI 03, select one of the relays LI to L4, HI to day 4, which indicate the low group frequency, and one of the relays LI to L4, which indicate the high group frequency. OSI05 by operating one of them at the same time
Of the 8 waves being sent out, two waves are selected, one from the low frequency group and one from the high frequency group, according to the sending number, mixed by resistors Ro to 7, and passed through the amplifier AMP to OTLI.
Sent to OI. This signal is sent as it is to the outside of the sending register of the switching device 2, where it is stored after reception identification. CONTI03 is released after a certain period of time (according to the standards of Nippon Telegraph and Telephone Corporation, the push button dial make time is at least 40 seconds.
(must be sent out with guarantee) Release the start signal to the sending relay to restore it, and after ensuring the break time, start up the sending relays LI to L4 and HI to day 4 again, and start sending the second digit number. . In this way, the preset called subscriber selection digits are sent out one after another. When the transmission to the last digit is completed, CONTI 03 deactivates the relay S of SWI07, releases the relay S, and then outputs the OTLIO.
I is again passed through the selection circuit 108-1 and the HYB circuit 109 to the RECI04, and waits for the operation on the exchange device 2 side, and waits for the arrival of the calling charge, response tone, or busy tone.

At this time, the transmitting terminal identification signal f8 passes through the amplifier AMm
Supplied to YB circuit 109 and then OTL via HYB and ATT
It is sent to the exchange device 2 side from the IOI. Also, in this embodiment, the OTLI OI is explained as one line in order to facilitate understanding of the operation, but in an actual analogous call device, the OTL
I 01 is a signal receiving circuit 104 for 5 to 10 lines.
Since one is installed, the dial tone detection operation detects the dial tone for all lines in the same group, and selects the line for which the dial tone has been detected, in other words, the line for which the connection to the dial register has been completed. Sends numbers.

For lines for which dial tone could not be detected, the dial tone is detected again after a certain period of time, and if it is still not detected, the call is determined to be an incomplete call, added to the number of incomplete calls, and the line is placed on-hook. to stop calling.

Response signal detection is also performed by the same means as outgoing blue detection.
On the other hand, in the switching device 2, after the calling register completes receiving the selected number, the called party is selected in a generally known manner, the call is received at the subscriber terminal, and a calling signal is sent out.

This subscriber terminal has TTLI0 shown in Fig. 4 in advance.
2 is connected, and the above-mentioned call signal is supplied to the full-wave rectifier circuit composed of rectifiers DO to 03 via the resistor R0 and capacitor C2 of TTLI02, so that the relay R operates. For this reason, the contact ★ operates and supplies air to the delay timing circuit consisting of resistors R3, R4 and capacitor C3. This delay timing circuit is always connected to capacitor C3.
is charged with 115V, the capacitor VO is in an on state, and the potential of the capacitor C3 is lowered by R3 due to the operation of the contact. For this reason...VO' is in the OFF state, and INVI is turned on to give "1" to the set terminal S of the flip-flop FF. relay L operates. The delay timing circuit is used to ensure the operation of the relay R, and has a time constant set in the range of several hundred seconds to several seconds.

As is well known, once the set terminal S becomes "1", the flip-flop FF continues its operation even if this "1" signal is removed midway through, and in order to release the set state, the reset status R must be set to "1". must give.

Therefore, it is easy to understand that even if relay R is restored, relay L continues to operate. When relay L operates, contact 1
Therefore, a DC loop circuit in a response state (off-hook state) is closed to the exchange device 2 side, and a response signal sound is connected to the ATOSCI06 via the HYBIO9 by the contact 10 and sent to the OTLIOI side. In addition, the timing circuit composed of the resistor R11 and the capacitor C5 is operated by the contact 12, and even after a certain period of time (this time is set to the longest time under the worst conditions of the series of operations for checking the connection), the relay L is not activated. If the operation continues, UJT1 (NEC
When the product (product name: NI Rainbow 1 or NI Shugen equivalent) is turned on, "1" is given to the reset terminal R of the flip-flop FF via the OR circuit OR, the flip-flop FF is reset, and the relay L is forcibly restored. let

The switching device 2 stops the ringing signal by using the DC loop circuit in the responding state from the TTLI 02, and completes the train with the originating subscriber.

As a result, the outgoing blood deposit TLIOI and the telegraph side TTLI02 are connected by the exchange device 2, and the outgoing terminal identification signal f8 sent via the OTLI OI is TTLI02.
When the reception identification is completed at the signal receiver DREC via the HYB, the output of DREC becomes "1" and the output of V2 becomes "0".

Therefore, the transistor Tr is turned off and the resistors R6,
A timing circuit consisting of R7 and capacitor C4 starts charging capacitor C4, and after a certain period of time UJ
T0 (NEC product name NI Niji 1 or N13r2 equivalent) is
It becomes on state (output is "1" state) and "1" is applied to the reset terminal R of flip-flop FF via OR circuit OR.
is input, the flip-flop FF is reset, the output becomes "0", the relay L is restored, and TTLI 0
2 is an on-hook state. On the other hand, on the OTLIOI side, the response signal sent from the TTLI 02 side is received by RECI04.
When it is received and identified at , the output is CON at contact tdo.
CONTI03 determines that the call has been connected to the incoming terminal and the train is normal, adds 1 to the number of completed calls in the statistical data, and completes the test of the line. , test the state of the following lines.

In this way, the OTLI O1 is monitored one after another, and when all lines in the same group are terminated, the relays A of all the OTLI OIs are restored to the on-hook state, and this is detected on the switching equipment 2 side. , free all trains.
Again, after a certain period of time, CONTI 03 becomes OTLI OI
Activate relay A to bring it off-hook, and repeat the test in the same manner as described above.

3 TTLI02 corresponding to the test OTLIOI is OT
When the transmitting terminal identification signal sent from the LI OI side is received and identified, after a certain timing (this time is the resistor R in Figure 4).
6.This 3 hour setting is made by the charging circuit composed of R7 and capacitor C4, but OTLIO
Approximately 1 second to 2 seconds for the response signal to be sufficiently confirmed and identified on the I side.
self-recovery (set to seconds). Therefore, as before,
There is also a complicated control method that allows the calling side and the called side to be on-hook at the same time by accommodating them in association with the calling side.
This is no longer necessary, and furthermore, even when setting up a pseudo-call device, the receiving side does not need to be associated with the calling side and can be accommodated freely, so the effect is very high. In the above explanation, the transmission terminal identification signal sent from the OTLI01 side is transmitted via the HYBIO9.
The explanation is based on the state where it is constantly supplied from SI05, but CON
By making the control means in TI03 a little more complicated, H
YBIO9 can be easily removed.

In other words, the purpose of HYBIO9 is to prevent RECI04 from malfunctioning due to the transmission terminal identification signal f8 sent from OSI05.
It can be easily understood that the insertion of O9 is intended to lower the level of arrival of the transmission terminal identification signal to RECI04.

Then CONTI03 is RECI 04 is TTLI 0
After receiving and identifying the response confirmation signal from 2, if the sending terminal identification signal is sent out (the sending time is enough time for TTLI 02 to identify the reception), HYBIO9 can be deleted and R
The design conditions for ECI04 can also be simplified. Of course, it goes without saying that the control procedure for CONTI03 will be complicated. On the other hand, on the TTLI 02 side, the signal receiver DREC
When it identifies the transmitting terminal identification signal, it immediately gives "1" to the OR circuit OR to reset the flip-flop FF (the lead shown by the dotted line connecting DREC and OR), which will be related to INV2, Tr, and UJTO. It will be readily understood that circuit components may be removed.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of a conventional pseudo call device;
The figure is a block diagram showing an embodiment of a similar call device of the present invention,
3 and 4 show the contents of each block in the block diagram shown in FIG. 2, with FIG. 3 being a circuit diagram of the transmitting terminal side and FIG. 4 being a circuit diagram of the receiving terminal. 2 is a switching device, 101 is an outgoing terminal function circuit, 102 is an incoming terminal function circuit, 103 is a control circuit, 104 is a signal receiving circuit, 105 is a pulse signal sending circuit, 106 is a response signal sending circuit, 107 is a switching circuit, 108 11,108-2
109 is a selection circuit, 109 is a hybrid circuit, and 1101 is an OTL connection confirmation circuit. Shu/Zuen Z Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. In a pseudo-call device having a call path confirmation function, the transmitting terminal function circuit receives a response confirmation signal from the transmitting terminal identification signal sending means for displaying the calling party and the receiving terminal function circuit;
The incoming terminal function circuit is provided with a means for receiving and detecting the outgoing terminal identification signal and a means for sending a response confirmation signal to indicate that a call has been received, so that the incoming terminal function circuit transmits a response confirmation signal when a call is received. When the transmitting terminal identification signal is received, the transmitting terminal functional circuit self-recovers after sufficient time has elapsed for the transmitting terminal functional circuit to receive and identify the response confirmation signal sent by the receiving terminal functional circuit, and the transmitting terminal identifying signal is received. A pseudo-call device characterized in that it has a self-control function to self-recover after a certain period of time longer than the above-mentioned time if the pseudo-call device cannot do so. 2. In a pseudo call device having a communication path confirmation function, the sending terminal function circuit receives a response confirmation signal from the sending terminal identification signal sending means for displaying the calling party and the receiving terminal function circuit,
The incoming terminal function circuit is provided with a means for receiving and detecting an outgoing terminal identification signal and a means for sending a response confirmation signal to indicate that the incoming call has arrived. When the transmitted response confirmation signal is received by the transmitting terminal function circuit and the transmitting terminal identification signal transmitted from the transmitting terminal function circuit is received by the receiving terminal function circuit, the transmitting terminal function circuit immediately self-recovers and identifies the transmitting terminal. A pseudo call device characterized by having a self-control function that self-recovers after a certain period of time when a signal cannot be received.