JPH04156034A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To perform connection by another equipment continuously by transferring a call to a master machine not in busy or a slave machine not in busy, not opening a central office when a line is cut off due to the exhaustion of the battery of the slave machine in busy. CONSTITUTION:When the power source of the slave machine is exhausted, battery voltage drop data is sent out, therefore, the control part 17 of the master machine receiving the data holes a captured central office by a holding circuit 24 when detecting the fact that the reception of a wave from the salve machine transmitting the data is disabled continuously for constant time after the reception of the data, and calls the master or slave machine not in busy. A held central office is transferred to the master or slave machine replying to the call. In such a way, it is possible to continue speech by the slave machine to which the call is transferred by a method to receive communication from the operator of the slave machine receiving transfer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cordless telephone device that has a function of transferring the connected central office line when the battery voltage drops during use.

[Prior Art] In recent years, various kinds of telephones have been provided, and one of them is a cordless telephone device, which does not require a connection cord between a handset and a main body, and is used in various places. This device consists of a parent unit and a slave unit, and the slave unit is battery operated, and sends battery voltage drop data as a warning about 3 minutes before the battery runs out. It has become.

If continued use after that, the handset will eventually run out of battery and stop transmitting radio waves, so AM detects the stoppage of radio waves from the handset and opens the central office line about 30 seconds after that.

[Problem to be Solved by the Invention] In the above case, the operator of the handset knows that communication has been interrupted because the battery has run out, so the operator of the handset knows that communication has been interrupted by then, or if necessary, terminates the call that is the main requirement. I try to contact the other party in some way, but for example, if OZA puts the central line on hold and the central line becomes disconnected while I am away from the handset, I don't know the cause, so I don't know what to do. 6 [Means for Solving the Problem] In order to solve this problem, the first invention provides a system that, after receiving battery voltage drop data, detects the data from the handset that sent this data. Radio wave detection means for detecting that radio waves cannot be continuously received for a certain period of time or more.

Holding means for holding the station line being captured based on the output of the radio wave detection means; paging means for calling a base unit or slave unit that is not in a call; The main unit is equipped with a control unit consisting of transfer means for transferring lines.

The second invention is provided with a memory storing a specific voice message, and the control unit detects when the radio wave from the handset that has transmitted this data cannot be continuously received for a certain period of time after receiving battery voltage drop data. Sends the voice message read from the memory to the central office line, puts this central office line on hold, calls the base unit or handset that is not talking, and based on the response, sends the voice message read from the memory to the answered base or handset. It is designed to transfer central office lines.

[Operation] When the handset runs out of power, battery voltage drop data is sent, so the base unit that receives this data must be unable to continue receiving radio waves from the handset that sent this data for a certain period of time or more. When it detects, the station line being captured is put on hold,
A call is made to a base unit or handset that is not on a call, and the call is transferred to the base or handset that answers the call.

[Embodiment] FIGS. 1 and 2 are block diagrams showing an embodiment of the present invention, in which FIG. 1 is a block diagram of a master device, and FIG. 2 is a block diagram of a slave device. In FIG. 1, 11 and 12 are photocouplers made of a light emitting diode and a light receiving diode for loop detection, 21 and 22 are photocouplers made of a light emitting diode and a light receiving diode for incoming call detection, 31 and 32 are relays for loop interruption, 4 is a diode bridge, 6 is a resistor, 7□ and 7□ are DP diamond cell photocouplers consisting of a light emitting diode and a light receiving diode, 8 is a communication IC 19□ and 92 is a transformer, 10 is a cross point IC 111 is a receiver, 12 is a receiver Dial IC 113 is a hook switch, 14 is a display, 15 is various keys, 16 is IDROM, 17 is a control circuit, 181
182 is a modem, 19 is an amplifier, 20 is a speaker, 21□ and 212 are wireless units, 23□ and 2
32 is an antenna, and 24 is a reservation circuit.

Figure 2 shows slave units 401 to 40. In the block diagram of
Among them, the antenna 5 is
0, wireless unit 51, modem 52, II open circuit 53
Display 54, various keys 55, buzzer 56, indicator light 57,
IDROM58, voltage detection circuit 59, power supply charging circuit 60
, an amplifier 61, a changeover switch 62, a speaker 63, a receiver 64, a microphone 65, and a battery 70.

FIG. 3 is a flowchart showing the operation of this device,
When an incoming call is detected in step 100, step 10
Incoming call detection processing is performed in step 1.9 When the incoming call detection processing is completed, the determination in step 100 is "NO", and a determination is made as to whether or not to operate the base unit in step 103.However, at this point, the base unit is not operated. Therefore, as shown in step 104, N
= 1. This step is the first process for sequentially monitoring the status of all slave units, and by setting N=1, slave unit 1 will be monitored first.

If it is determined in step 105 that there is no data received from child all, it is determined whether the child device number is set in the register in step 1o8, but at this point, the child device number is not yet in the register. Assume that it is not set (the handset number is set in the register after the battery voltage drop data is sent, as will be described later).

Then, as shown in step 109, N is incremented by 1, and it is determined in step 110 whether N is the last number A of the handset, and steps 105 and 108 are performed until N reaches the number A of handsets.゜Repeat the process of 109 and 110, and when N becomes the number of slave devices A, the flow goes to step 10.
Return to 0. In this way, when no handset is in use,
The handset numbers are monitored in order from 1 to A. When a slave unit eventually uses it, in step 105 the slave unit N
It is determined that the received data is . If it is determined in step 106 that the received data is not battery voltage drop data, a predetermined process in step 151 is performed, and general control for a telephone is performed.

When a certain slave unit is in use, the battery voltage drops, and this is received by the base unit, and if it is determined in step 106 that it is battery voltage drop data, the slave unit number is set in the register in step 107. This handset number may be set, for example, to the handset number that the handset sends along with the battery voltage drop data. When the handset finishes transmitting the battery voltage drop data, the data from the handset is received in step 105. When it is determined in step 108 that the handset number is set in the register, a determination is made in step 111 as to whether or not radio waves cannot be received continuously for a certain period of time.

A few minutes after the handset transmits the battery voltage drop data, the battery runs out and the radio waves stop, so step 11
1 determines that there is no radio wave for a certain period of time r:Rw. Accordingly, in step 120, it is determined whether or not an outside line call is in progress. If an outside line call is in progress, a message is sent in step 121. This message is sent to the other party via the central office line, and includes, for example, ``The phone's battery has run out.0 We will transfer the call to the central office line, so please wait for a while.''

After the announcement is completed, an outside call is put on hold as shown in step 122, and in step 123 it is determined whether the base unit is not in use.

If the base unit is not on a call, the base unit is called as shown in step 124, and when the base unit responds as shown in step 125, it is connected to the slave unit whose battery is exhausted as shown in step 126. The central office line that was previously connected to the base unit will be connected to the base unit, and you will be able to talk to the other party using the base unit's handset.

If the base unit is in use in step 123, the non-calling handset is called as shown in step 130, and when the called handset responds as shown in step 131, the station is called as shown in step 132. line is transferred to that child device.

If the outside call is not in progress in step 120, it is determined in step 140 whether the outside line is on hold. If the outside line is on hold, the outside line is released from hold as shown in step 141, and a message is sent as shown in step 142. This message is also sent with the same content as before. Then, as shown in step 143, the outside line is put on hold again, and from then on, step 1 described above is performed.
Perform the processing from 23 onwards.

Note that if it is determined in step 103 that the base unit is not being operated, a predetermined process in step 150 is performed, and if in step 140 that an outside line is not on hold, a predetermined process in step 152 is performed.

[Effects of the Invention] As explained above, in the present invention, when the line is disconnected due to the battery of the handset being exhausted during a call, instead of opening the central office line, Since the call is now forwarded to a handset that is not in use, for example, even if you are on hold and the line is disconnected while you are away from the handset, you will not be able to receive a call from the operator of the handset that was transferred. Since the call can be received, the call can be continued using the transferred handset. Therefore, even if the handset during a call runs out of battery, there is an effect that connection can be continued with other devices.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a parent device to which the present invention is applied, FIG. 2 is a block diagram showing an example of a child device, and FIG. 3 is a flowchart showing the operation of the parent device. 1.2.7...Photocoupler, 11...-1 transmitter/receiver, 17...Control circuit, 21.51...Wireless unit, 70...Battery.

Claims (2)

[Claims] (1) Consists of a base unit connected to a central office line and a plurality of slave units that each operate on a battery and communicate with the base unit via radio waves, and each slave unit operates when the battery voltage value is below a predetermined value. In a cordless telephone device that outputs an alarm and transmits battery voltage drop data to the base unit, the base unit receives the battery voltage drop data and then transmits radio waves from the handset that has transmitted this data for a certain period of time. A radio wave detecting means for detecting that the radio wave cannot be received continuously; a holding means for holding the station line being captured based on the output of the radio wave detecting means; 1. A cordless telephone device comprising: a control unit comprising a transfer means for transferring a pending central office line to a responding base unit or slave unit. (2) In claim 1, the control unit includes a memory storing a specific voice message, and the control unit detects that after receiving battery voltage drop data, it cannot continuously receive radio waves from the handset that has transmitted this data for a certain period of time. Sends the voice message read from the memory to the central office line, puts this central office line on hold, calls the base unit or handset that is not on a call, and calls the base unit or handset that answered based on the answer. A cordless telephone device characterized by having a transfer function for transferring lines.