JP2931494B2 - Cordless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DTMF for a telephone line.
The present invention relates to a cordless telephone device characterized by signal transmission.

[0002]

2. Description of the Related Art In a touch-tone telephone, a telephone number is called DTMF.
(Dual tone multifrequency
By transmitting a tone signal called y) to the telephone line, the tone signal is transmitted to the other party. The DTMF signal has a high group frequency (1209, 1477, 1336, 1633 Hz)
And low group frequencies (697, 770, 852, 941H
This is a tone signal generated by combining the two sounds z). In a push phone, a unique tone signal is assigned to each dial key, so that a call can be made earlier by a push operation as compared with a dial operation by a conventional pulse dial method.

[0003] When the DTMF signal is used in a cordless telephone device, there are the following two methods. The first method is a method in which a DTMF generator is built in a slave unit, the DTMF signal itself generated via a wireless system is transmitted to the master unit, and the DTMF signal received by the master unit is transmitted to a telephone line. In the second method, a DTMF generator is built in the master unit, data corresponding to the DTMF signal is transmitted from the slave unit to the master unit via a wireless system, and the master unit analyzes received data to generate a DTMF signal. This is a method of sending out to a telephone line.

[0004]

However, according to the first method, since the DTMF signal itself is transmitted to the master unit via the wireless system, the dispersion of the parts constituting the master unit and the slave unit and the antennas are reduced. Depending on the situation, the waveform of the DTMF signal may be distorted, the signal level may fluctuate, etc.
The DTMF signal itself may be degraded.

According to the second method, although the DTMF signal transmitted from the master unit to the telephone line does not deteriorate, the data corresponding to the DTMF signal transmitted from the slave unit is missing or deteriorated. In such a case, the transmission time of the DTMF signal to the telephone line may vary, or the worst case may occur in which the data cannot be analyzed and the DTMF signal cannot be transmitted to the telephone line.

The present invention has been made to solve the above problems, and has as its object to provide a cordless telephone device capable of reliably transmitting a DTMF signal to a telephone line.

[0007]

In order to achieve the above object, the present invention comprises a master unit connected to a telephone line and a slave unit connected to the master unit by radio, and uses a DTMF signal. In the cordless telephone device for transmitting a telephone number, the slave unit has a first area and a second area having data to be converted into a DTMF signal with respect to the master apparatus, and an area subsequent thereto. And a frame transmission means for transmitting a predetermined number of third areas having data for setting the transmission time of the DTMF signal to the telephone line as one DTMF-compatible frame. First of the DTMF compatible frames transmitted from the slave unit
When receiving the area of the second area or the second area, the conversion means for converting the data in the area to a DTMF signal, and counting is started each time the DTMF-compatible frame is received from the slave unit, and transmitted to the telephone line. A counter for measuring a transmission time of a DTMF signal to be output, and a count value of the counter based on data in the area each time each area in the DTMF-compatible frame sequentially transmitted from the slave unit is received. A count value setting change means for changing the setting of
The DTMF signal obtained by the conversion means is transmitted to the telephone line when the counter starts counting, and is stopped when the counter ends counting.
Signal transmission means.

Further, the present invention is characterized in that the frame transmission means of the slave unit continues to the first region and the second region when one key is continuously turned on with respect to the master unit. , The fourth area having data for continuing the transmission of the DTMF signal to the telephone line is continuously transmitted, and when the key is turned off, the transmission of the DTMF signal to the telephone line is started from that time. While a predetermined number of fifth areas having data for setting the time until the end are transmitted, the count value setting change unit of the master unit transmits the fourth area and / or the fourth area transmitted from the slave unit. Alternatively, every time the fifth area is received, the count value of the counter is changed based on the data in the area, and the DTMF signal transmitting means sets the DTMF signal at the end of the counting of the counter.
The transmission of the signal to the telephone line is stopped.

[0009]

According to the above arrangement, in the cordless telephone device, the DTM is transmitted to the parent device by the frame transmission means.
A first and second areas having data for conversion into an F signal, and a predetermined number of third areas having data for setting a transmission time of a DTMF signal to a telephone line in an area following the first and second areas; The area is transmitted as a DTMF compatible frame.

On the other hand, when the master unit receives the first area or the second area of the DTMF-compatible frame transmitted from the slave unit, the conversion means converts the data in the area into a DTMF signal. You. The counter starts counting each time a DTMF-compatible frame transmitted from the slave unit is received, and the DTMF to be transmitted to the telephone line is started.
The transmission time of the F signal is measured. In this case, every time each area in the DTMF compatible frame sequentially transmitted from the slave unit is received, the count value setting change unit changes the count value based on the data in the area. The DTMF signal sending means sends the DTMF signal obtained from the conversion means to the telephone line when the counter starts counting time, and stops sending to the telephone line when the counting of the counter ends.

When the ON state of one key is continued on the side of the slave unit, the frame transmission means sends the DT to the master unit after the first area and the second area.
A fourth area having data for continuing transmission of the MF signal to the telephone line is continuously transmitted. Thereafter, when the key is turned off, the frame transmission means has data for setting the time from the time to the end of the transmission of the DTMF signal to the telephone line to the master unit. A predetermined number of fifth regions are transmitted.

Therefore, on the master unit side, every time the fourth area and / or the fifth area transmitted from the slave unit is received, the count value setting change means uses the count value setting changing means based on the data in the area. The count value of the counter is changed. Then, when the counting of the counter ends, the transmission of the DTMF signal to the telephone line is stopped by the DTMF signal transmission means.

As a result, the master unit can reliably send the DTMF signal to the telephone line by receiving the second area even if the reception of the first area fails. In addition, every time when each area sequentially transmitted from the slave unit is received, the count value of the counter is set to a predetermined value and time counting is started, so that the transmission time of the DTMF signal to the telephone line varies. Disappears.

When one key is continuously pressed on the side of the slave unit, the master unit can continue sending the DTMF signal to the telephone line by receiving the fourth area. . Thereafter, when the key which has been kept pressed is released on the side of the child device, the parent device loses the reception of the fourth area and subsequently receives the fifth area, Since the counter starts counting each time the area is received, it is possible to end the transmission of the DTMF signal to the telephone line a predetermined time after the key that has been pressed is released.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. In the cordless telephone device according to the present invention, data corresponding to the DTMF signal is transmitted from the slave to the master, and the data received by the master is converted into a DTMF signal and transmitted to the telephone line. This is because, as described above, when the method of transmitting the DTMF signal itself via the wireless system is used, the DTMF signal may be deteriorated.

FIG. 1 shows a DTM transmitted from a slave unit to a master unit.
FIG. 3 is a schematic diagram illustrating a frame configuration of data corresponding to an F signal. The frame configuration of the data transmitted when one dial key is pressed (data corresponding to one digit of the DTMF signal) is composed of five frames a, b, c, d, which are time-allocated in order every 36 msec. e. Also, in each of the frames a, b, c, d, and e,
Data DTMS1, DTMS corresponding to DTMF signal
2, DTME2, DTME1, and DTME0 are assigned.

Therefore, when one dial key is pressed, five data are transmitted within 180 msec (36 × 5 = 180). Also, the first data DT corresponding to the DTMF signal to be transmitted next
The insertion time until MS1 is transmitted is 108 msec.
(However, 36 × 3 = 108). As a result,
The time required to transmit data corresponding to one DTMF signal when one dial key is pressed is 28
8 msec (however, 180 + 108 = 288).

FIG. 2 is a table showing the data contents of DTMS1 and DTMS2 allocated to each of the frames a and b shown in FIG. The leftmost column shows twelve DTMF signals 1 to # corresponding to each dial key. The center column shows the DT transmitted corresponding to each of the DTMF signals 1 to #.
The data contents D1 to DC of MS1 and the rightmost column are
DTMS2 also transmitted corresponding to each DTMF signal
Are shown respectively. The master unit receives and reads the data transmitted from the slave unit, and converts the data into a DTMF signal corresponding to each data. In addition, c shown in FIG.
Data for setting the time for transmitting the DTMF signal to the telephone line is assigned to the remaining three frames d and e.

FIG. 3 shows the DTM to the telephone line when the master unit receives frames a through e shown in FIG.
It is a schematic diagram which shows the transmission time of F signal. The operation of the master unit in this case is as follows. First, when the data DTMS1 allocated to the frame a is received, it is converted into a corresponding DTMF signal based on the table in FIG. 2 and transmitted to the telephone line. At the same time as sending this DTMF signal,
A TMF transmission time counter (this counter is incorporated in a microprocessor in the master unit and has a count cycle of 36 msec) is set to "4". Next, the data DTM assigned to the frame b
When S2 is received, the DTMF transmission time counter is set to "3".
Set to. In this case, since DTMS1 has been received 36 msec before, conversion to a DTMF signal is not performed.
Subsequently, the data DTME2 assigned to the frame c
Is received, the DTMF transmission time counter is set to “2”. Further, the data DT assigned to the frame d
Upon receiving ME1, the DTMF transmission time counter is set to "1". Subsequently, when the data DTME0 allocated to the frame e is received, the DTMF transmission time counter is set to "0", and the transmission of the DTMF signal to the telephone line is stopped.

As a result, the DTMF signal becomes 144 ms
ec (however, 36 × 4 = 144), and is transmitted to the telephone line.
After the elapse of msec (288-144 = 144), the next DTMF signal will be transmitted. FIG.
FIG. 3 is a schematic diagram showing a transmission time of a DTMF signal to be transmitted to a telephone line when a master unit cannot receive data DTMS1 transmitted from the slave unit shown in FIG. The master unit receives the data DTMS2 allocated to the frame b when the data DTMS1 cannot be received due to deterioration of the data DTMS1, and converts the data DTMS1 into a DTMF signal corresponding to the data DTMS2 based on the table shown in FIG. And sends it out to the telephone line. Also, the data D 36 msec before
Since TMS1 has not been received, the DTMF transmission time counter is set to "4" simultaneously with the transmission of this DTMF signal. Next, the data DTM assigned to the frame c
When E2 is received, the counter is set to "3". Subsequently, when the data DTME1 allocated to the frame d is received, the counter is set to “2”. Further, upon receiving the data DTME0 allocated to the frame e,
Set the counter to "1". Thereafter, no data is transmitted from the slave unit, but since one cycle of the counter is 36 msec as described above, the counter becomes "0" after 36 msec, and the transmission of the DTMF signal is stopped.

As a result, the DTMF signal becomes 144 ms
ec (however, 36 × 4 = 144), and 108 msec after the transmission of the DTMF signal is stopped.
When c (where 288-36-144 = 108) has elapsed, the next DTMF signal will be transmitted. FIG.
Describes the format of data transmitted from the slave to the master when the slave keeps pressing one dial key, and the DT to send to the telephone line when the master receives the data.
It is a schematic diagram which shows the transmission time of MF signal. (A) shows the transmission time of the DTMF signal transmitted to the telephone line when the master unit receives the data DTMS1,
(B) shows the transmission time of the DTMF signal which is received continuously by the data line DTMS2 and transmitted to the telephone line when the master unit cannot receive the data DTMS1. Here, data DTMS1 and data DTMS2
Until the transmission of the data DTME4, the transmission of the data DTME4 is continued in the same manner as when one dial key is pressed, but when the dial key is kept pressed. When the hand is released from the dial key, data DTME1 and data DTME0 are transmitted, and the data transmission ends.

As a result, in the case of (a), 72 msec after the hand is released from the dial key (data DT
Sum of time to send ME1 and data DTME0. (36 + 36 = 72), and in the case of (b),
After 108 msec (72 + 36 = 108), transmission of the DTMF signal to the telephone line is stopped.

FIG. 6 is a table showing the settings of the DTMF transmission time counter. First, data D at the time of ONE PUSH
In the case of (1) receiving TMS1, the data DTMS
At the same time as receiving 1, a DTMF signal is transmitted to the telephone line, and the counter is set to "4". Thereafter, the counter is set to "3" simultaneously with the reception of the data DTMS2, the counter is set to "2" simultaneously with the reception of the data DTME2, and the counter is set to "1" simultaneously with the reception of the data DTME1.
The transmission of the DTMF signal to the telephone line is stopped simultaneously with the reception of E0, and the counter is set to "0". DTMF
The sending time counter measures the time of (set value × 36 msec).

Next, when the data DTMS1 is received and one dial key is kept depressed (2), the DTM is received simultaneously with the reception of the data DTMS1.
The F signal is transmitted to the telephone line, and the counter is set to "4". Subsequently, the counter is set to "3" simultaneously with the reception of the data DTMS2. Thereafter, since the data DTME4 is continuously transmitted, the counter is set to “4” every time the data DTME4 is received. Thereafter, when the hand is released from the dial key that has been held down, the data DT
Since ME1 is transmitted, the counter is set to "1" simultaneously with the reception of this data. Further, upon receiving the subsequently transmitted data DTME0, the transmission of the DTMF signal to the telephone line is stopped, and the counter is set to "0".

The data DTM at the time of ONE PUSH
S1 could not be received and data DTMS2 was received (3)
In the case of, the DTMF is simultaneously received with the data DTMS2.
Send the signal to the telephone line and set the counter to "4". Thereafter, the counter is set to "3" simultaneously with the reception of the data DTME2, the counter is set to "2" simultaneously with the reception of the data DTME1, and the counter is set to "1" simultaneously with the reception of the data DTME0. After 36 msec elapses, the counter becomes "0" and the transmission of the DTMF signal to the telephone line is stopped. Further, when data DTMS1 cannot be received and data DTMS2 is received, and one dial key is kept pressed (4), a DTMF signal is transmitted to the telephone line simultaneously with the reception of data DTMS2. , The counter is set to “4”. Thereafter, the data DTME4 is continuously transmitted, but the data DTM
Each time E4 is received, the counter is set to "4". Thereafter, when the hand is released from the dial key that has been kept pressed, the data DTME1 is transmitted, so that the counter is set to "2" simultaneously with the reception of this data. Further, the counter is set to "1" at the same time when the subsequently transmitted data DTME0 is received. After that, 36m
After a lapse of sec, the counter becomes “0” and DTMF
Stop sending signals to the telephone line.

FIG. 7 shows the relationship between the contents of the data received by the master unit and the transmission time of the DTMF signal correspondingly transmitted to the telephone line when the slave unit presses one dial key. It is a schematic diagram. FIG. 8 shows the contents of data received by the master unit and the corresponding DTM transmitted to the telephone line when the slave unit keeps pressing one dial key.
It is a schematic diagram which shows the relationship of the transmission time of F signal. In both figures, “〇” indicates that the corresponding data has been received (ie,
"*" Indicates that the corresponding data could not be received (i.e., a reception error). [] Indicates the DTMF sent to the telephone line.
The signal transmission start and stop points are shown respectively.

First, in FIG. 7, one dial key is pressed by the slave unit, and the slave unit successively sends five data DTMS1, DTMS2, DTME2, DTME1, DTME1,
When DTME0 is transmitted in order, the presence or absence of reception of each data is displayed for 1 to 24 cases. 1 to 1
Case 6 is the case where the data DTMS1 was successfully received, and cases 17 to 24 show the case where the data DTMS1 was not received and the data DTMS2 was received instead.

For example, the first case shows a case where all five data can be received. In this case, FIG.
As described above, the DTMF transmission time counter is set to “4 → 3 → 2 → 1 → 0” every time each data is received. Therefore, the transmission time of DTMF indicated by [] is 144 m
sec (however, 36 + 36 + 36 + 36 = 144), and 144 ms after receiving the data DTMS1
After ec, the transmission of the DTMF signal to the telephone line is stopped.

The case No. 16 is the data DTMS
This shows a case where only 1 could be received and the remaining 4 data could not be received. In this case, the data DTM
Simultaneously with the reception of S1, the DTMF transmission time counter is set to "4". Since no data is received thereafter, the time is measured according to the set value "4" and 144 msec.
After that (36 × 4 = 144), the transmission of the DTMF signal to the telephone line is stopped.

The 17th case is the data DTMS
1 is not received, the data DTMS2 is received instead, and the remaining three data are received. In this case, as described with reference to FIG. 4, the DTMF transmission time counter is set to "4" at the same time that the data DTMS2 is received.
Each time the remaining data is received, “3 → 2 → 1 → 0” is set, so the transmission time of DTMF shown in [] is 1
44 msec (however, 36 + 36 + 36 + 36 = 14
The transmission of the DTMF signal to the telephone line is stopped 144 msec after the reception of the data DTMS2.

In the case of the 24th case, the data DTMS
1 is not received, the data DTMS2 is received instead, and the remaining three data are not received. In this case,
Simultaneously with the reception of the data DTMS2, the DTMF transmission time counter is set to "4". Since no data has been received thereafter, the time is measured according to the set value "4", and again, 144 msec (however, 36 × 4 = 144) Later D
The transmission of the TMF signal to the telephone line is stopped.

As is clear from the above description of the four representative examples, when the slave presses one dial key, the data DTMS1 is received and the data DTMS1 is received.
Even when the data DTMS2 is received without receiving the MS1, the transmission time of the DTMF signal transmitted to the telephone line is always 144 msec.

Next, in FIG. 8, when one dial key is kept pressed on the slave unit, the data D is transmitted from the slave unit to the master unit.
TMS1 and data DTMS2 followed by data DTME
In the case where the data DTME1 and the data DTME0 are transmitted after four consecutive 4s are transmitted, the presence / absence of reception of each data is displayed for 1 to 17 cases. 1 to
Case 9 is a case where data DTMS1 was successfully received, and cases 10 to 17 are cases where data DTMS1 was not received and data DTMS2 was received instead.

For example, the first case shows a case where all eight data can be received. In this case, FIG.
As described in (2) above, the DTMF transmission time counter sets “4 → 3 → 4 → 4 → 4 → 4” every time each data is received.
→ 1 → 0 ”, the transmission time of DTMF shown in [] is 252 msec (36 + 36 + 36
+ 36 + 36 + 36 + 36 = 252), and the data D
After receiving TMS1, the transmission of the DTMF signal to the telephone line is stopped after 252 msec.

In the fourth case, the first six data can be received, and the remaining two data DTME1 and DTM
This shows a case where E0 could not be received. In this case, at the same time as receiving the last data DTME4,
Since the MF transmission time counter is set to “4” and no data has been received thereafter, it is counted according to the set value “4”, and 144 msec after receiving the last data DTME4.
After c (however, 36 × 4 = 144), the transmission of the DTMF signal to the telephone line is stopped. Therefore, when compared with the first case, 72 msec (however, 144-36-36
= 72) and the DTMF signal is sent out to the telephone line.

The case No. 8 is the data DTMS.
1, after receiving the data DTMS2 and the data DTME4, the following data DTME4 cannot be received and the remaining two data DTME1 and DTME0 are received. In this case, the DTMF transmission time counter is set to "3" at the same time as the reception of the data DTMS2, and the DTMF transmission time counter is set to "4" at the same time as the reception of the data DTME4.
Since data is not received until E1 is received, "3 → 2 → 1" is counted for 108 msec according to the set value "4". The DTMF transmission time counter is set to "1" at the same time as receiving the data DTME1, and the DTMF transmission time counter is set to "0" at the same time as receiving the data DTME0. As described above, in the case of the eighth case, the number of reception errors of the data DTME4 can be up to three times, and similarly to the case of the first case, after the data DTMS1 is received, the DTM is received 252 msec later.
The transmission of the F signal to the telephone line is stopped.

Next, the tenth case is the data DTMS.
1 shows a case where the reception of No. 1 could not be performed and the remaining seven data could be received. In this case, as described in FIG. 6 (4), at the same time as receiving the data DTMS2,
The MF transmission time counter is set to “4”, and thereafter, each time the data DTME4 is received, the DTMF transmission time counter is set to “4”. Thereafter, the DTMF transmission time counter is set to "2" simultaneously with the reception of the data DTME1, and the DTMF transmission time counter is set to "1" simultaneously with the reception of the data DTME0. Thereafter, clocking is performed for 36 msec according to the set value “1”, and the transmission of the DTMF signal to the telephone line is stopped. Therefore, when compared with the first case, the DTMF signal is transmitted to the telephone line longer by 36 msec.

For each of the cases 11 to 17,
Although the description is omitted, the cases of Nos. 11, 12, 14, 15, and 16 are 1 when compared with the case of No. 1.
As in the case of No. 0, DTMF is longer by 36 msec.
The signal will be sent to the telephone line. In addition, case 13 is 4 when compared to case 1.
As in the case No. 2, the DTMF signal is transmitted to the telephone line for 72 msec longer. Further, as is apparent from the 17th case, even when the data DTMS2 cannot be received but the data DTMS2 is received,
The number of reception errors of the data DTME4 can be up to three times.

As is apparent from the above description of the representative example, when the slave unit keeps pressing one dial key, even if the slave unit receives the data data DTMS1, the slave unit cannot receive the data DTMS1 and receives the data DTMS1. Even when DTMS2 is received, 72 msec, 108 msec, or 144 msec after the hand is released from the dial key
After msec, the transmission of the DTMF signal to the telephone line is stopped.

FIG. 9 is a flowchart showing the control of DTMF signal transmission performed by the base unit of the cordless telephone device according to the present invention. First, the frame DT transmitted from the slave unit
It is checked whether or not MS1 has been received (S1). If it has been received (Yes in S1), the count value of the DTMF time transmission counter is set to 4 and time counting is started (S2). The signal is converted into a signal and transmitted to the telephone line (S3). Subsequently, it is determined whether or not the frame DTMS2 transmitted from the slave unit has been received (S4). If it has been received (Yes in S4), the count value of the DTMF time transmission counter is set to 3 Timing is started (S5). If the frame DTMS2 has not been received (No in S4), the process proceeds to S6.

Next, the frame DTM transmitted from the slave unit
It is confirmed whether E4 has been received (S6). Here, when the frame DTME4 has not been received (No in S6), it is further confirmed whether or not the frame DTME2 transmitted from the slave unit has been received (S7). If it has been received (Yes in S7), the count value of the DTMF time transmission counter is set to 2 and the timing is started (S8). The frame DTME
If No. 2 has not been received (No in S7), the process proceeds to S9.

Subsequently, the frame DT transmitted from the slave unit
It is determined whether or not ME1 has been received (S9). Then, when it is received (Yes in S9),
The count value of the DTMF time transmission counter is set to 1 and time measurement is started (S10). The frame DTME1
Is not received (No in S9), the process proceeds to S11.

Further, the frame DTM transmitted from the slave unit
It is checked whether E0 has been received (S11). If it is received (Yes in S11), the count value of the DTMF time transmission counter is set to 0 (S12), and the transmission of the DTMF signal to the telephone line is stopped (S14). If the frame DTME0 has not been received (No in S11), 36 m
After confirming that the time has elapsed (Ye in S13)
In the case of s), the transmission of the DTMF signal to the telephone line is stopped (S14).

On the other hand, the frame DTM transmitted from the slave unit
If E4 has been received (Yes in S6), the count value of the DTMF time transmission counter is set to 4 and time counting is started (S21). In addition, 108 msec
After the elapse (Yes in S22), it is confirmed whether or not the frame DTME1 has been received (S24). If it has been received (Yes in S24), the process proceeds to S10. If 108 msec has not elapsed (No in S22),
Subsequently, it is confirmed whether or not the frame DTME4 has been received (S23). If the frame DTME4 has been received (Yes in S23), the process proceeds to S21.

In step S24, the frame DTME1
Is not received (in the case of No), subsequently, it is confirmed whether or not the frame DTME0 has been received (S2).
5) If it is received (Yes in S25), the process proceeds to S12. Furthermore, the frame DTME
0 is not received (No in S25)
After confirming that 144 msec has passed (S2
In the case of Yes in 6), the transmission of the DTMF signal to the telephone line is stopped (S14).

FIG. 10 is a continuation of the flowchart shown in FIG. That is, the frame DTMS transmitted from the slave unit
If No. 1 has not been received (No in S1), subsequently, it is confirmed whether or not the frame DTMS2 has been received (S101). Then, in the case where it has not been received (No in S101), the process ends. When the frame DTMS2 is received (S10
In the case of Yes in 1), the count value of the DTMF time transmission counter is set to 4 and time counting is started (S10).
2) At the same time, it converts to a DTMF signal and sends it out to the telephone line (S103).

Next, the frame DTM transmitted from the slave unit
It is checked whether E4 has been received (S104). Here, when the frame DTME4 is not received (S10
In the case of No in 4), it is further confirmed whether or not the frame DTME2 transmitted from the slave unit has been received (S105). If it has been received (Yes in S105), the count value of the DTMF time transmission counter is set to 3 and time measurement is started (S106).
When the frame DTME2 is not received (S1
If No in step S05), the process proceeds to S107.

Subsequently, the frame DT transmitted from the slave unit
It is determined whether or not ME1 has been received (S107). Then, when received (Yes in S107)
, The count value of the DTMF time transmission counter is set to 2 and the time measurement is started (S108). Note that frame D
When TME1 is not received (No in S107)
), The process proceeds to S109.

Further, the frame DTM transmitted from the slave unit
It is checked whether E0 has been received (S109). If it has been received (Yes in S109), the count value of the DTMF time transmission counter is set to 1 and time measurement is started (S110). And 36mse
c has been confirmed (Yes in S112)
), The transmission of the DTMF signal to the telephone line is stopped (S113). If the frame DTME0 has not been received (No in S109), 72 m
After confirming that the time has elapsed (Y in S111)
In the case of es), the transmission of the DTMF signal to the telephone line is stopped (S113).

On the other hand, the frame DTM transmitted from the slave unit
When E4 is received (Yes in S104)
, The count value of the DTMF time transmission counter is set to 4 and time measurement is started (S121). Further, 108 ms
After ec has elapsed (Yes in S122), it is confirmed whether or not the frame DTME1 has been received (S12).
4). Then, when it is received (Yes in S124)
), The process proceeds to S108. In addition, 10
If 8 msec has not elapsed (No in S122)
), It is checked whether or not the frame DTME4 has been received (S123), and if it has been received (S123).
In the case of “Yes” in the step), the processing shifts to the processing of S121.

In step S124, the frame DTME
If No. 1 has not been received (No), it is checked whether or not the frame DTME0 has been received (S12).
5) If received (Yes in S125)
Then, the process proceeds to S110. Further, the frame DT
If ME0 is not received (No in S125), after confirming that 144 msec has elapsed (Yes in S126), transmission of the DTMF signal to the telephone line is stopped (S113).

FIG. 11 is a flowchart showing the control of the transmission of the DTMF compatible frame performed by the slave unit of the cordless telephone device according to the present invention. First, when any key is pressed (Yes in S31), the T1 timer is turned on (S32). Here, the T1 timer is set to the maximum time when a key is normally pressed. Subsequently, the number of the pressed key is detected, and the corresponding data is created (S33). If it is confirmed that the T1 timer has expired (Yes in S34), it is confirmed whether or not the key has been turned off (S36).

When the key is turned off (Y in S35)
es), the T2 timer is turned on (S3
6). Here, the T2 timer generates a pulse every 36 msec. Subsequently, the area number N is 1
Is set (S37), and it is confirmed whether N is 3 or more (S38). When N is 1 or 2 (No in S38), D is stored in the N area, respectively.
Data for TMF signal conversion is stored and transmitted (S
39). Further, after confirming that 36 msec has elapsed (S41), N is incremented (S43) and S3
Then, the process proceeds to a step S8.

When N is 3 or more (Yes in S38), the set value of the counter in the master unit is stored in the N area and transmitted (S40). Then, it is confirmed that the storage in the final area has been completed (in the case of Yes in S42), and the above series of processing ends. If storage in the last area is not completed (S
If No in step S42), the process proceeds to S41.

FIG. 12 is a continuation of the flowchart shown in FIG. That is, when the key is not depressed and is continuously pressed (No in S35), the T2 timer is turned on (S301). Subsequently, the area number N is 1
Is set (S302), and it is confirmed whether N is 3 or more (S303). If N is 1 or 2 (No in S303), data for DTMF signal conversion is stored in the N area and transmitted (S304). Further, after confirming that 36 msec has elapsed (S305), N is incremented (S30).
6), the process proceeds to S303.

If N is 3 or more (Yes in S303), the set value "4" of the counter in the master unit is stored in the N area and transmitted (S30).
7). Subsequently, it is confirmed whether or not the key has been turned off (S308). Then, when the key is kept pressed without being turned off (No in S308),
The process proceeds to S305. If the key is turned off (Yes in S308), 36 msec
After confirming that the time has elapsed (S309), N is incremented (S310). Then, when it is confirmed that the storage in the final area is completed (Y in S311)
In the case of es), the set value “0” of the counter in the master unit is stored in the N area and transmitted (S312). When the storage in the last area is not completed (S311
In the case of No), the set value "1" of the counter in the master unit is stored in the N area and transmitted (S31).
2). Thereafter, the process proceeds to S309.

[0057]

According to the present invention described above, the data corresponding to the DTMF signal is transmitted from the slave unit instead of transmitting the DTMF signal itself from the slave unit to the master unit via the wireless system. Therefore, the DTMF signal waveform may be distorted or the signal level may fluctuate depending on the variation of the components constituting the master unit or the slave unit or the state of the antenna, and the DT
There is no possibility that the MF signal itself is deteriorated.

Further, even if the data corresponding to the DTMF signal transmitted from the slave unit is missing or deteriorated, a reception error is possible up to a predetermined number of frames of the transmitted data. It is possible to keep the time for sending to the telephone line within a certain time. As a result,
The DTMF signal can be reliably transmitted to the telephone line. For example, even when the home control system is operated using a touch-tone phone from outside, malfunctions are prevented, and the home control system can be safely operated. Be able to operate.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a frame configuration of data corresponding to a DTMF signal transmitted from a slave unit to a master unit.

FIG. 2 is a table showing data contents of DTMS1 and DTMS2 allocated to each frame of a and b shown in FIG. 1;

FIG. 3 is a diagram illustrating a case where a master unit is connected to a frame e shown in FIG.
FIG. 4 is a schematic diagram showing a transmission time of a DTMF signal to a telephone line when the reception of the DTMF signal is completed.

FIG. 4 is a schematic diagram showing a transmission time of a DTMF signal transmitted to a telephone line when a master unit cannot receive data DTMS1 transmitted from the slave unit shown in FIG.

FIG. 5 is a diagram illustrating a format of data transmitted from the slave to the master when the slave continues to press one dial key, and a DTMF signal transmitted to the telephone line when the master receives the data. It is a schematic diagram which shows the sending time of.

FIG. 6 is a table showing settings of a DTMF transmission time counter.

FIG. 7 is a schematic diagram showing the relationship between the content of data received by the master unit and the transmission time of a DTMF signal transmitted to the telephone line in response to the pressing of one dial key by the slave unit. is there.

FIG. 8 is a schematic diagram showing the relationship between the content of data received by the base unit and the transmission time of a DTMF signal transmitted to the telephone line in response to the case where the mobile unit keeps pressing one dial key. It is.

FIG. 9 is a flowchart showing control of DTMF signal transmission performed by the base unit of the cordless telephone device according to the present invention.

FIG. 10 is a continuation of the flowchart shown in FIG. 9;

FIG. 11 is a flowchart showing control of transmission of a DTMF-compatible frame performed by a slave unit of the cordless telephone device according to the present invention.

FIG. 12 is a continuation of the flowchart shown in FIG. 11;

[Explanation of symbols]

 DTMS1 Data for converting to DTMF signal DTMS2 Data for converting to DTMF signal DTME2 DTMF signal transmission time setting data DTME1 DTMF signal transmission time setting data DTME0 DTMF signal transmission time setting data DTME4 DTMF signal transmission time setting data

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akio Asayama 2-18 Keihanhondori, Moriguchi City Sanyo Electric Co., Ltd. (56) References JP-A-61-74427 (JP, A) JP-A-57-155846 (JP, A) Shokai Sho 61-78447 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 1/72 H04Q 7/38

Claims (2)

(57) [Claims] 1. A cordless telephone device comprising a master unit connected to a telephone line and a slave unit connected to the master unit via radio, and transmitting a telephone number using a DTMF signal. A first area and a second area having data to be converted into a DTMF signal, and an area subsequent to the first area for setting a transmission time of the DTMF signal to the telephone line; While a frame transmission means for transmitting a predetermined number of third areas having data as one DTMF compatible frame is provided, the master unit is provided with a first area of the DTMF compatible frame transmitted from the slave unit or A conversion unit for converting data in the second region into a DTMF signal when receiving the second region; and starting counting each time the DTMF-compatible frame is received from the slave unit. A counter for measuring a transmission time of a DTMF signal to be transmitted to a line; and each time each area in the DTMF-compatible frame sequentially transmitted from the slave unit is received, the counter based on data in the area. Means for changing the count value of the counter, and sending the DTMF signal obtained by the conversion means to the telephone line when the counter starts counting time, and stops sending to the telephone line when the counting of the counter ends. DTMF
A cordless telephone device comprising: a signal transmitting unit. 2. The method according to claim 1, wherein the frame transmission means of the slave unit transmits a DTMF signal to the master unit after the first area and the second area when one key is kept on. The fourth area having data for continuing transmission to the telephone line is continuously transmitted, and when the key is turned off, the transmission of the DTMF signal from the time to the end of transmission to the telephone line is completed. While a predetermined number of fifth areas having data for setting time are transmitted, the count value setting change unit of the master unit transmits the fourth area and / or the fifth area transmitted from the slave unit. Each time an area is received, the count value of the counter is changed based on the data in the area, and the DTMF signal sending means stops sending the DTMF signal to the telephone line when the counting of the counter ends. thing The cordless telephone device according to claim 1, wherein: