JPS5947511B2 - Calling signal sending method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a calling signal sending system for terminals such as telephones.

A conventional circuit for sending out a calling signal has, for example, the configuration shown in FIG. 1, in which RC is a relay control terminal;
IR is a terminal for an IR calling signal sound source, SIR is a terminal for an SIR calling signal sound source, VIR is a terminal for a VIR calling signal sound source, 5
is an IR signal sending relay, T is a SIR or VIR signal sending relay, s is a contact of the s relay, is a contact of a T relay, F is an AC static relay, R is a resistor for DC current control, g
, and g2 are contacts of a relay for sending out a calling signal, V is a power supply, LINEI and LINE2 are lines, and TEL is a telephone set.

First, a conventional calling signal sending system will be explained using FIG. In the case of calling a general terminal, it is necessary to supply an IR signal to the terminal, and the control section drives the relay S to the ON state through the terminal RC. As a result, contact s of relay S
is closed and the IR signal is IR-s-F-g7-LINEI-T
The signal flows in a loop of EL-LINE2-g2-R-V, and a telephone TELlfCIR signal serving as a terminal is sent out. Further, it is necessary to send an SIR signal in the case of mutual extension calling, and a VIR signal in the case of videophone calling, and the control section drives relay T to the ON state through terminal RC.
This closes the contacts of relay T, and the SIR signal or V
IR signal is SIR(VIR)--F-gl-LIN
The signal flows in a loop of EI-TEL-LINE2-g2-R-V, and an SIR signal or VIR signal is sent to the terminal. In the conventional system, the relays themselves are large, relays are required for the number of call signal sound sources, two trunks are required if both are used because it is determined whether to supply SIR or VIR signals depending on the application, and CR signal transmission is required. The disadvantage was that it required a separate trunk, making it impossible to make it smaller and more economical. Electronic subscriber circuits with integrated functions have also been reported (for example, “IEICE Technical Research Report, Vol. 7
9, Ya 34, SE79-19P5, Chapter 3, Figure 2), having various signal sound sources individually increases the number of switches and interface lines, which is undesirable. In order to solve these drawbacks, the present invention unifies various sound sources classified by intermittent patterns into a single pattern (for example, a continuous signal), and provides a circuit for setting the transmission pattern, thereby making it possible to The purpose of this system is to make it possible to generate and send out any intermittent pattern, and to make it possible to send out various ringing signal tones.

Examples will be described in detail below. FIG. 2 is a main part block diagram of the first embodiment of the present invention, in which BF is a communication current supply circuit, DET is a ring trip detection circuit, CRG is a CR signal sound source, and SWl and SW2 are switching circuits. , NOT is a NOT circuit, ANDl, AND2 are AND circuits, SEL is a pattern selection circuit, MEM is a pattern selection memory, CRCTR is a CR signal pattern generation counter, IRCTR is an IR signal pattern generation counter, SIRCTR, VIRCTR are SIR signals and VIR
Signal pattern generation counter, T! is a CR signal pattern, T2 is an IR signal pattern, T is an SIR signal pattern, T4 is a VIR signal pattern, P is a control unit (not shown)
This is a control information input terminal from.

Note that the same reference numerals as in FIG. 1 indicate the same parts. When the telephone equipment is in an on-hook state and an incoming connection call occurs, a control section (not shown) applies ringing signal transmission request information to terminal P.

As a result, the call signal type and switch drive information are written in the memory MEM, and the pattern selection circuit SEL controls the counter CRCTR,
Select signal patterns T1 to T4 generated in IRCTR, SIRCTR, and IRCTR. Also, AND circuit ANDl
, AND2 from the memory MEM, the outputs of the AND circuits ANDl and AND2 become 61-60 according to the pattern selected by the pattern selection circuit SEL.
'', and the switching circuits SWl and SW2 are AND circuits AND
It opens and closes according to the output of l, AND2,
C according to the pattern selected by the pattern selection circuit SEL.
The CR signal (for example, 16H2) from the R signal sound source CRG is transmitted intermittently to the telephone set I (C). Since the CR signal pattern T is a pattern indicating a continuous signal,
The pattern selection circuit S can always be set to logic “17”.
When this CR signal pattern T is selected in the EL, the switching circuit SWl is in the ON state, the switching circuit SW2 is in the OFF state, and the CR signal is continuously transmitted from the CR signal sound source CRG to the telephone set 1fC. .

In addition, although the signal sound source is shown for the case of one type,
Even when a plurality of signal sound sources are used, it is possible to send out a plurality of signal patterns as in the above-described embodiment. FIG. 3 is a block diagram of a main part of a second embodiment of the present invention, and is for a case where the transmission of paging signals to a plurality of subscribers is controlled in a time-sharing manner.

In the figure, SC is a subscriber circuit, CMC is a common control circuit, REG is a register corresponding to each subscriber circuit, CTR is a counter, and DEC is a counter CTR, which decodes the count contents and designates the subscriber circuit SC. The decoder RAM is a writable memory that stores the calling status of each subscriber circuit, RPTN is an area of the memory RAM that stores the type of calling signal, and ON is an area that stores whether or not the calling signal is being sent. Note that the same reference numerals as in FIG. 2 indicate the same parts. Next, the operation of this will be explained.

Memory RAMIC. stores the calling states of all subscribers that can be controlled in a time-divisional manner, and sequentially specifies addresses of memory RAM areas allocated to each subscriber using a counter CTR. In the case of sending a ringing signal, that is, when a call for an incoming connection occurs and the address of the memory corresponding to the desired subscriber circuit is specified by the counter CTR, the information is applied from the control unit (not shown) to the terminal PIIC. Of these, call signal pattern information is written in area RPTNIIC, and switch drive information is written in area ON. In this embodiment, four types of paging signals are set by allocating two pits per subscriber to the RPTN area, and one pit per subscriber is allocated to the ON area, so that the driving state of the paging signal switch (logic "1") is set. If the logic is "0", the call signal is sent, and if the logic is "0", the call signal is stopped).

Further, the counter CTR specifies the address of the memory RAM and at the same time sends the subscriber circuit number corresponding to the address to the decoder DEC, the decoder DEC selects a desired subscriber circuit, and drives the register REG of the subscriber circuit. . The call signal type in the RPTN area of the designated memory address is read and a desired call signal pattern is selected by the pattern selection circuit SEL. In the register REG,
Memory RAM 0N area information and pattern selection circuit SE
The logical product with the signal pattern selected by L and the logical product with the inverted signal of the signal pattern are input, but in this case, ON
Since the information in the area is ``1'', the output information of the AND circuit AND1 or AND2 sampled at the read cycle of the memory address is written directly to the X register REG.

Switching circuits SWl and SW are set according to the accumulation result of register REG.
2 are alternately opened and closed, and the CR signal and the earth signal are alternately sent to the terminal, making it possible to send out the desired calling signal. Next, the case of stopping the transmission of the calling signal will be explained.

The call signal sending stop information "0" is written in the 0N area of the memory RAM by the same operation as when sending out the calling signal.The read result of this 0N area is sent to the AND circuit ANDl, AND.
Regardless of the output of the pattern selection circuit SEL, the outputs of the AND circuits AND1 and AND2 become 00'', and 60'' is written in the register REG. This resistor REG opens both switching circuits SWl and SW2, allowing complete separation from the CR signal sound source and the earth's atmosphere.
The above operations are performed on a time-division basis for a plurality of subscribers, and it becomes possible to send desired paging signals to a plurality of subscriber circuits using one signal sound source and one common control circuit. Although FIG. 3 shows the case where one type of calling signal sound source is used, a case where different signal sound sources (signals other than 16j) are used together can also be realized using the same concept as in FIG. 3. FIG. 4 is a main part block diagram of the third embodiment of the present invention when the memory access timing is divided into two in the call signal sending circuit shown in FIG. A register that stores the output of RAM, REG2 is a register for software write data, REG3 is a register for soft write addresses, SEL1 is a selector for soft address/hard address, and 0DRDEC is a decoder that distributes orders from the control unit. , WECNT is a write enable timing generation circuit, SSL is a subscriber circuit specification circuit, DE
Cl is a decoder for package selection, BUF is a buffer circuit for circuit selection, PSL is a terminal for package selection, CSL
is the circuit selection terminal, CLK is the clock signal, THS is the hardware/software selection information, THR is the hard read clock, TA in FIG. 4A is the access time of the memory allocated to one subscriber, HR is the hard read time, SW is soft write time.

In FIG. 4, the same reference numerals as in FIGS. 1, 2, and 3 indicate the same parts. Next, the operation of this will be explained. In this embodiment, the time TA allocated to each subscriber during which the memory can be accessed is divided into two, and each of the two divided times is allocated to read out the contents written in the memory RAM, and the time HR and the memory The time allocated to writing to change the contents written in the RAM is allocated to SW. When a call signal sending request is issued by the control section, a command to change the storage contents of the memory RAM and a drive command for the registers REG2 and REG3 are sent to the decoder 0DRDEC. At the same time as this operation, register REG2VC switch drive information and call signal type information are sent to register REG2.
G3lfC Writes the address information of the memory area where the specified subscriber circuit data is stored. σ is information for distinguishing between hard time and soft time, and is separated by selector SEL1 by reversing the polarity. In the memory change operation, a write enable signal is sent from the soft write enable timing generation circuit WECNT at the time of SW, the address of the memory RAM is specified from the register REG3 via the selector SELl, and the switch drive information is called from the register REG2. The signal type is written.

This stored information is stored in σ at time HR of time TA allocated to the same subscriber in the next cycle. By sending out the timing signal, the signal is written in the register REGl, and the desired calling signal pattern is selected by the pattern selection circuit SEL in the same manner as in the embodiment shown in FIG.
A control signal for the switching circuit is output from 1 and AND2. The above operation opens and closes the ringing signal switch, but if the desired subscriber circuit is specified using the subscriber circuit designation circuit SSL during the HR time of the memory access time TA of the desired subscriber circuit, the call signal switch is opened and closed. Opening/closing information is written to the register, and a calling signal can be sent.

Next, when you want to stop sending out the ringing signal, use the same operation as sending out the ringing signal to reset the memory RAM to 0 at the time of TAf)SW.
It is sufficient to write "0" in the N area.

Although FIG. 4 shows the case where one type of call signal sound source is used, a case where different signal sound sources are used together can also be realized using the same concept as in FIG. 4.

Also, in Figures 2, 3, and 4, the memory RAM (7)
By assigning a specific pattern in the RPTN area as the switching circuit off, the read output of the memory RAM is detected,
The 0N region can also be omitted by using the output of the detection result for controlling the calling signal sending opening/closing circuit. As explained above, the present invention provides switching circuits SW1 and SW2 that open and close signal sound sources such as CR signal sound source CRG, CR signal patterns, IR signal patterns, SIR signal patterns, and I
Means such as a counter for generating various calling signal patterns such as the R signal pattern, means for selecting a calling signal pattern such as a pattern selection circuit SEL, and storage means for storing the calling state such as memories MEM, RAM, registers REG, REGl, etc. and selects a ringing signal pattern according to the stored ringing state, controls the opening/closing circuit according to the selected ringing signal pattern, and sends out the signal from the signal sound source as the ringing signal, Various calling signals can be easily created, and if a new calling signal is required, it can be easily handled by changing or adding a calling signal pattern.

Furthermore, if a plurality of subscriber circuits are controlled in a time-division manner, there will be more common parts, and this will result in an economical configuration when selectively transmitting various calling signals.

In addition, the present invention is not limited to the above-described embodiments, but can be modified in various ways.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional calling signal sending system, and FIGS. 2, 3, and 4 are main part block diagrams of an embodiment of the present invention.
FIG. 4A is a timing diagram. Place...telephone, LINE1, LINE2...railway,
BF...Talking current supply circuit, DEF...Ring trip detection circuit, SWl, SW2...Opening/closing circuit, CRG
...CR signal sound source, MEM...memory for pattern selection, SEL...pattern selection circuit, CRCTR...
CR signal pattern generation counter, IRCTR...I
R signal pattern generation counter, SIRCTR...S
IR signal pattern generation counter, VIRCTR...
・VIR signal pattern generation counter, SC...subscriber circuit, CMC...common control circuit, REG, REGl
~REG3...Register, DEC, ODRDEC...
- Decoder, RAM...Memory, SSL...Subscriber circuit designation circuit, WECNT...Write enable timing creation circuit, BUF...Buffer circuit.

Claims (1)

[Claims] 1 comprising an opening/closing circuit for opening and closing a signal sound source, a means for generating various ringing signal patterns, a selection means for selecting the various ringing signal patterns, and a storage means for storing the ringing state; The call signal pattern is selected by the selection means according to the call state, and the opening/closing means is controlled in accordance with the selected call signal pattern to send out the signal from the signal sound source as the call signal. Calling signal sending method.