JPH04217148A - telephone - Google Patents

Abstract

PURPOSE:To attain the use of a redial function to plural partner sides. CONSTITUTION:A telephone set is provided with two memories 21A and 21B and a redial switch key 13 which selects the memories 21A and 21B. In a dialing state, the memory 21A or 21B is selected by the key 13 and the data on the partner telephone numbers are written. In a redialing state, the memory 21A or 21B is selected by the kay 13 the written data on the telephone numbers are read out. Then the dial signal corresponding to the read-out data is outputted to an outside line 99.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone having a redial function.

0002

2. Description of the Related Art As telephones become more multi-functional, telephones with a redial function have appeared. That is, in a telephone having this redial function, when a call is made, the telephone number at that time is stored in the telephone. Then, the next time you make a call, if you press the redial key, the call will be made to the person with that memorized phone number.

[0003] Therefore, for example, if you make a call and the call is busy, you can call the same party again by simply pressing the redial key after a while.

0004

However, in the conventional redial function, the redial function cannot be utilized in the following cases.

[0005] (1) I called Mr. A, but the call was busy.

(2) Mr. A was on the phone, so I called Mr. B next.

(3) Since Mr. B also does not answer the phone (or after the call with Mr. B), he calls Mr. A again.

In such a case, Mr. A's telephone number is stored in the telephone by the operation (1).

However, since the next operation (2) is performed, Mr. B's telephone number is stored in the telephone at this point. Therefore, when you call Mr. A again in (3), you must dial all of Mr. A's telephone numbers from the beginning.

Moreover, if Mr. B's telephone number is dialed after dialing Mr. A, the memory of Mr. A's telephone number will be erased even if the telephone call with Mr. B could not be made.

[0011] The present invention aims to solve these problems.

0012

[Means for Solving the Problem] Therefore, in the present invention, if the reference numerals of each part correspond to the embodiments described later, two memories 21A, 21B and a redial dial for selecting these two memories 21A, 21B are provided. Switching key 13
When dialing, data on the other party's telephone number is supplied to the forming circuit 16 and a dial signal corresponding to the other party's telephone number is output to the outside line 99, and the data on the other party's telephone number is sent to two Among the memories 21A and 21B,
The data of the telephone number is written in the memory selected by the redial switching key 13, and when redialing, the data of the telephone number is read from the memory selected by the redial switching key 13 among the two memories 21A and 21B, and the data of the read telephone number is transferred to the forming circuit 16. The dial signal corresponding to the read telephone number data is output to the outside line 99.

[0013]

[Function] When dialing, the data of the telephone number of the other party is selectively written to the memories 21A and 21B, and when redialing, the data of the telephone number is selectively read from the memories 21A and 21B, and this read data A dial signal corresponding to the above is output to the outside line 99, and
), the redial function is realized even in such cases.

[0014]

[Example] In Fig. 1, 1 is a transmitter, 2 is a receiver, 3
is the line interface, 99 is the outside line (public telephone line)
shows. In this case, the interface 3 includes a 4-wire/2-wire conversion circuit, a hook switch, and the like, and the transmitter 1 and the receiver 2 are connected to the outside line 99 through the interface 3.

Furthermore, 11 is a dial key, 12 is a redial key, and 13 is a redial switching key, and these keys 11 to 13 are connected to a control circuit 20, which will be described later. Also, 14 indicates a ringer, 15 indicates a switch,
These are also connected to the control circuit 20. Note that the switch 15 is for detecting whether the handsets 1 and 2 are on-hook or off-hook.

Further, 16 is a dial signal, that is, D
A forming circuit for forming a TMF signal, and 17 a detecting circuit for a ring tone signal at the time of an incoming call.

The control circuit 20 is actually composed of a microcomputer, and the control circuit 20 controls each of the circuits described above to realize the function of a telephone.

Furthermore, the circuits 21A to 25 are implemented by a microcomputer (
The functions and processing of the control circuit 20 are expressed by hardware.

That is, 21A and 21B indicate memories for redialing, the memory 21A stores the data of the first redialing telephone number, and the memory 21B stores the data of the second redialing telephone number. . Also, 2
2 and 23 are switch circuits for switching the memory; 24
2 is a switch control circuit, and 25 is a switch circuit.

When the redial switching key 13 is pressed, this is detected by the control circuit 20, and this detection output is supplied to the switch control circuit 24. , 23 are switched in conjunction with the state shown in the figure and the state opposite to that shown in the figure. Further, according to such a configuration in which the switch circuit 25 is switched between normal dialing and redialing by the control circuit 20, when a call is received, the ring tone signal is detected by the detection circuit 17, and the detection signal is The signal is supplied to the control circuit 20, and the control circuit 20 controls the ringer 14 to produce a ringer sound.

When the handsets 1 and 2 are removed from the telephone, the switch 15 is turned on, for example, from off, and this is detected by the control circuit 20. As a result, the ringer 14 is stopped by the control circuit 20, and the interface 3 is controlled to be in an off-hook state, and the handsets 1 and 2 are connected to the outside line 99 through the interface 3.

[0022] Therefore, if the own voice signal is transmitted to the transmitter 1
from the outside line 99 to the outside line 99 through the interface 3.
is supplied to the handset 2 through. In other words, you can talk to the other party.

Furthermore, at the end of a call, when the handsets 1 and 2 are placed on the telephone, the switch 15 is turned from on to off, and this is detected by the control circuit 20.
The interface 3 is controlled and placed in an on-hook state. Therefore, the conversation is over.

Further, when making a call, when the handsets 1 and 2 are removed from the telephone, the switch 15 is turned on from off, and this is detected by the control circuit 20. Then, the control circuit 20 controls the interface 3 to put it in an off-hook state, so that the handsets 1 and 2 and the formation circuit 16 are
It is connected to an outside line 99 through the interface 3.

When the telephone number of the other party is entered using the dial key 11, this is interpreted by the control circuit 20 and data TLDT indicating the telephone number of the other party is formed. This data TLDT is then supplied from the control circuit 20 to the formation circuit 16 via the switch circuit 25, and the formation circuit 16 sequentially outputs a DTMF signal corresponding to the telephone number of the other party.
It is output to the outside line 99 through. In other words, a call and a dial have been made.

Furthermore, during this dialing, the data TLDT of the telephone number is sent to the memory 21 through the switch circuit 22.
It is supplied to A or 21B and written. In this case, this writing is performed by the switch circuit 22 (and 23)
It depends on whether the memory is switched to, 21A or 21B, but either memory may be used. In this case, the switch circuit 22 (and 23) is in the state shown in the figure.
Therefore, it is assumed that the telephone number data has been written into the TLDT memory 21A.

[0027] Then, if the other party answers the call by the dialing operation described above, the user can thereafter have a conversation with the other party.

However, if the call is in (1) above, the following operations and processing will be performed.

[0029] That is, as shown in (1) above, the person making the call was Mr. A, and as shown in (2) above, Mr. A was on the phone (or was talking to the other party, Mr. A). Next, when calling Mr. B, the user first presses the redial switch key 13.

Then, the control circuit 20 detects that the key 13 has been pressed, and this detection output is supplied to the switch control circuit 24, which causes the switch circuits 22 and 23 to be in a state opposite to that shown in the figure. Can be switched.

[0031] Next, make a call to Mr. B in the same way as with a normal telephone. Then, at the time of dialing, the data TLDT of Mr. B's telephone number is supplied to the formation circuit 16 and
A DTMF signal corresponding to Mr. B's telephone number is output to the outside line 99, but at this time, the data T of Mr. B's telephone number is
LDT is also supplied to the memory 21B through the switch circuit 22 and written therein.

[0032] As mentioned in (3) above, since Mr. B also does not answer the phone (or after the call with Mr. B), if you want to call Mr. A again, press the redial switch key 13.
Press again, and then press redial key 12.

Then, when keys 13 and 12 are pressed,
This is detected by the control circuit 20. And key 1
A detection output indicating that 3 has been pressed is supplied to the switch control circuit 24, and the switch control circuit 24
2 and 23 are switched again to the state shown in the figure, and then, in response to the detection output that the redial key 12 has been pressed, the switch circuit 25 is switched to the state opposite to that shown in the figure.

Furthermore, based on the detection output that the redial key 12 has been pressed, the telephone number data TLDT written in it from the memory 21A (and 21B), that is, in this case, the dialing operation of (1) The data TLDT of Mr. A's telephone number written in is read out. Then, this read data TLDT is supplied to the formation circuit 16 through the switch circuit 23 and further through the switch circuit 25, so the DTMF signal corresponding to Mr. A's telephone number is taken out from the formation circuit 16, and this is It is output to outside line 99.

[0035] Therefore, even if the user calls Mr. A again after going through the situations (1) to (3) above, the redial function is effective and it is possible to redial Mr. A.

Furthermore, if you call Mr. A as shown in (1), then call Mr. B as shown in (2), then press the redial key 1 without pressing the redial switch key 13.
When 2 is pressed, since the memories 21A and 21B have not been switched at this time, Mr. B (2) will be redialed. That is, the redial switching key 13
If you do not press , the last person you called will be redialed, as before.

Thus, according to the present invention, for example, two memories 21A and 21B and a redial switching key 13 are provided for redialing, and when dialing, the data of the telephone number of the other party is selectively stored in these memories 21A and 21B. Write TLDT and TLDT, and when redialing, selectively write phone number data TL from memories 21A and 21B.
DT is read and a dial signal corresponding to the read data TLDT is output to the outside line 99, so even in cases like (1) to (3) above, it is possible to call the first party using the redial function. can. Moreover, a general redial function can also be used.

[0038] In the above, redial key 1
2 and redial switching key 13 were provided exclusively,
Instead of these keys, the 0 to 9, *, and # keys may be combined to form a similar key. Furthermore, in the above description, the number of telephone numbers that can be redialed is two, but it may be greater than this. However, in that case,
A display function is required to select and confirm the telephone number to be redialed, and the operation may become complicated.

[0039]

According to the present invention, for example, two memories 21A, 21B and a redial switching key 13 are provided for redialing, and when dialing, these memories 21A, 21B,
21B selectively sends the other party's phone number data TLDT.
, TLDT, and when redialing, the memory 21
Since the telephone number data TLDT is selectively read from A and 21B and the dial signal corresponding to the read data TLDT is output to the outside line 99, the above (1)
Even in cases like ~(3), you can call the first caller using the redial function. Moreover, a general redial function can also be used.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an example of the present invention.

[Explanation of symbols]

1. Transmitter 2　　　　Telephone receiver 3. Line interface 11 Dial key 12 Redial key 13 Redial switch key 16 Formation circuit 17 Detection circuit 20 Control circuit 21A Redial memory 21B Redial memory 24 Switch control circuit 99 External line

Claims (1)

[Claims] Claim 1: A forming circuit that forms a dial signal from the data of the telephone number of the other party, a plurality of memories, and a redial switching key that selects the plurality of memories; is supplied to the forming circuit to output a dial signal corresponding to the telephone number of the other party to the outside line, and the data of the telephone number of the other party is stored in the memory selected by the redial switch key among the plurality of memories. When redialing,
The data of the telephone number is read from the memory selected by the redial switching key among the plurality of memories, and the data of the read telephone number is supplied to the formation circuit to dial the data corresponding to the data of the read telephone number. A telephone that outputs signals to outside lines.