JPS5953745B2 - Dial impulse sending method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dial impulse sending system in which a processor such as a microprocessor controls an impulse sending relay to send dial impulses.

Recently, a method has been adopted in which a terminal telephone device has a built-in processor, the impulse sending relay is controlled by the processor, and the contacts of the impulse sending relay inserted into the loop circuit perform make and break operations to send dial impulses. ``Button telephone exchange system'' (patent application 1983-1983) filed separately by the applicant.
An example of this is disclosed in No. 485).

J However, in general, relays have an operation delay time (hereinafter referred to as operation time) and a recovery delay time (hereinafter referred to as recovery time).
Even if the processor sends out pulsed control signals with predefined make and break times, the relay's individual operating and recovery times may cause the relay's contacts to actually make and break. This causes a delay in the timing of the switching, causing the make time and break time of the sent impulses to be inconsistent with the predetermined values, and in extreme cases (in extreme cases) causes a drawback that the response on the exchange side becomes inaccurate.

The present invention has the purpose of fundamentally eliminating such drawbacks of the conventional art, and uses a processor to store in advance the operating time specific to the impulse sending relay, and to actually measure the 5 recovery time specific to the impulse sending relay. Moreover, I memorize it,
Based on these operation times and recovery times, the processor controls the operation and recovery of the impulse sending relay, and sends out a dial impulse with a predetermined make time and breaker time. This provides a transmission method.

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

FIG. 1 is a block diagram of the central office line unit SLU in the above-mentioned "key telephone exchange system", and shows the diode and
A signal detection circuit DET using a bridge circuit, a photo coupler, etc. detects a calling signal arriving from the central office line SL, and sends this as incoming call information to the processor CPU. When the HS is activated and its contact HSl is made, a loop circuit is formed through the primary winding of the line transformer LT5, which separates and sends only the audio signal to the terminal unit TEU for exchange connection. At the same time, the impulse sending relay HS operates under the control of the processor CPU 5, making and breaking the contact HS1 from the output terminal, and sending out dial impulses.

In addition, contact HS2, which makes and breaks at the same time as contact HS1, connects ground or power to the processor C.
PUs, thereby transmitting a response signal to the processor CP indicating that the contact HSl has made a connection or a break.
It is supposed to be given to Us.

The processor CPUs are generally controlled by a separately provided main control unit MCU, and are configured to send out predetermined dial impulses in accordance with the control from the main control unit MCU. FIG. 2 is a time chart showing the control signal and response signal from the processor CPUs in FIG. enters the operating state and closes the loop circuit, but the response signal b becomes ``H'' after the operating time TMD specific to the impulse sending relay HS, and in reality, the loop circuit is closed at time 2. will be carried out.

Next, when the processor CPUs start dial impulse sending control, the control output a becomes "゜L゛ (I level)" at time 3, and the impulse sending relay HS starts to recover. Since the HS recovers after a recovery time TBD unique to the HS, the contacts HS1 and hS2 break at time 4, and the response signal b becomes ``L''.

In addition, the operating time TMD is, if the relays are of the same type,
It is almost constant depending on the power applied to the coil, and will be specific once the type of impulse sending relay HS is determined.
Since the recovery time TBD differs depending on the tension of the contact spring and the recovery spring determined for each relay, the operation time T can be predicted, whereas the recovery time TBD cannot be predicted. For this reason, the memory in the processor CPUs has an operating time TM stored in advance.
D is stored as data and the operating time TMD is stored, while the processor CP
Us measures the time between time points 3 and 4 by counting clock pulses, etc., and obtains the recovery time TBD.
The actual measured value of TB is stored in the memory, and the processor CPUs calculates TB-TMO based on the stored operating time T and a predetermined break time TB.
After performing the calculation, the passage of time is monitored by a timer configured in the processor CPUs, such as counting clock pulses, and at time 5, when the time TB-TMO has elapsed from time 4, the control signal a is set to "H". do.

Then, at time 6, which has passed the operating time TMD from time 5, the impulse sending relay HS becomes operational, and the contact H
Since Sl and hS2 make, the predetermined break time T
B is regulated.

Also, based on the recovery time TBO stored in the processor CPUs, T9-T is determined based on the predetermined make time TM.
After calculating BO, T
At time point 7 after M-TBD, the control signal a is
In order to set it to L, the point 8 after the recovery time TBO has passed.
Impulse sending relay HB is restored and contact HS
A predetermined make time TM is regulated by the break in l, hS2.

The above operation is repeated according to the number of dial impulses given by the main control unit MCU.
After the transmission of the dial impulse is finished, the control signal a is held at "H".However, even between time points 7 and 8,
If the recovery time TBD is actually measured and the contents of the memory are updated and used for regulating the next make time TM, the make time TM and break time TB can be regulated more accurately.

3 to 5 are flowcharts showing the above control operations in the processor CPUs, in which FIG. 3 is a common routine, and FIG. 4 is a routine when actual measurement of recovery time TBO is performed only once for the first time. FIG. 5 shows a routine for repeatedly measuring the recovery time TBD.

That is, in FIG. 3, if the loop closing command from the main control unit "MCU" becomes YES after "initial state setting", the control signal a is set to "H" by the "relay operation command". , the main control unit ゜゜M
If the dial command from the CU turns out to be YES, the clock pulse count is started by "Start time count" in order to actually measure the recovery time TBO, and the control signal a is set to "L" by the "Relay recovery command". do.

In FIG. 4, the ゜゜relay recovery command 7゛ is judged, and through this YES, ゜゜゜゜relay restoration command is NO.
At this time, the judgment of "゜first recovery 7" is made, and if this is YES, the clock pulse count result is stored in the memory by ゜゜time count registration'' and ``registration result memory storage'', and ``゜゜This is repeated until relay recovery 7' becomes YES, and the contents of the memory are updated one after another.

In addition, if the ゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜゜; This sets the timer, starts the timer, and when the timer times up, “
When the TB-TMO progress signal becomes YES, a relay operation command is issued to operate the impulse sending relay HS.

Next, after passing through the NO of "゜Relay recovery command" and the NO of "End dial command 7" from the main control unit MCU, if ゜゜Relay operation becomes YES, the restoration finally stored in the memory is executed. Based on the time TBD ゜゜Using TM-TBD calculation/timer set, perform the calculation and set the calculation result to the timer in the same way as described above, start the timer, and then calculate the "TM-TBD elapsed time" based on the time up of this timer. 7
If the answer is YES, the ``relay recovery command'' is sent and the above operations are repeated. However, each of ``゜TB-TMD calculation/timer setup'' and ``゜TM-TBD calculation/timer setup'' is performed once. and,"
゜TBTM0 elapsed time and "゜TM-TBO elapsed time 0"
This is not done during the iteration of the same route through N.

In addition, if the main control unit ``゜Dial command end 7'' from the ゜MCU becomes YES after ``゜Relay recovery command'' is NO, the main control unit ゜゜MCU returns to B in Fig. 3.
The loop open state is maintained until the loop open command from the main control unit MCU via the NO dial command 7 from the main control unit becomes YES and a "relay recovery command" is issued. is ゜゜Relay recovery command ゛YE
After the make period of each dial impulse, "time count registration" and "registration result memory storage" are performed through S and "NO" of "relay recovery", and each time the control signal a is set to "L". The recovery time TBD is actually measured and the memory contents are updated, and the contents are sequentially used to regulate the make time TM.

It should be noted that the second and subsequent ``゜time count start'' is performed after the ``゜゜relay recovery command'' is issued following the ``゜TM-TBD elapsed time''.

Therefore, since control is performed based on the actually measured recovery time TBO of the impulse sending relay HS, the make time TM and break time TB of the dial impulse to be sent are reliably regulated to predetermined values, and the response on the exchange side is will always be accurate.

In addition, the impulse sending relay HS is also used to close a loop circuit, but it is also possible to use a separate relay contact or hook switch to close the loop circuit, and various modifications are possible. .

As is clear from the above explanation, according to the present invention, the impulse sending relay is controlled based on the actually measured recovery time of the impulse sending relay. This value is maintained, and the make rate also matches the specified value, and a remarkable effect can be obtained in various terminal telephone devices that transmit dial pulses under the control of a processor.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; Fig. 1 is a block diagram of a central office line unit in a "button telephone exchange system"; Fig. 2 is a time chart showing signals of each part in Fig. 1; Figs. The figure is a flowchart showing control operations in the processor. CPUs...Processor, HS...Impulse sending relay, HSl, hS2...Contact.

Claims (1)

[Claims] 1 In a dial impulse sending method in which an impulse sending relay is operated and restored under the control of a processor, and dial impulses are sent by making and breaking contacts in the impulse sending relay, the processor delays the operation of the impulse sending relay. In addition to storing the time in advance, the recovery delay time of the impulse sending relay is actually measured and stored, and the processor controls the operation and recovery of the impulse sending relay based on the stored operation delay time and recovery delay time. A dial impulse sending method characterized in that the dial impulse sending method is characterized in that an impulse having a predetermined make time and break time is sent out.