JP3088254B2 - Cordless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone having a cordless handset which is charged on a base unit, and more particularly to a call processing operation of the cordless handset.

[0002]

2. Description of the Related Art Conventionally, in a cordless telephone provided with a cordless handset that is turned on in a base unit, the cordless handset cannot be called when the cordless handset is on-charged. This is because the operation of calling the cordless handset (child device) placed on the parent device from the parent device is not necessary.

[0003] However, when the cordless handset is not on-charged to the parent machine at the time of incoming call from the outside line, the cordless handset serving as the child machine is called. In this case, when the cordless handset is turned on while the cordless handset is being called, the base unit and the cordless handset independently perform the ringer operation, and the user feels that the ringer sound is loud.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a cordless telephone which eliminates the above-mentioned disadvantages.

[0005]

A cordless telephone according to the present invention is a cordless telephone comprising a base unit having a loudspeaker and a cordless handset which is charged on the base unit. At the time of an incoming call, the cordless handset is called up when the cordless handset is off-charged, and when the cordless handset is turned on during the call-in process, the calling process is stopped and the outside line is held. It was done.

In the cordless telephone, after the calling process is stopped and the outside line is held, when the cordless handset is off-charged, an outside line call is performed by the cordless handset via the base unit. Things.

[0007]

According to the cordless telephone of the present invention, when a call is received from an outside line while the cordless handset is off-charged, the cordless handset, which is a handset dedicated to the base unit, can be automatically called. Once the master unit captures the line and puts the outside line on hold, the cordless handset can be called internally by operating the keys on the master unit.

When the cordless handset is charged to the base unit without talking on the cordless handset while the cordless handset is being called via the base unit due to an incoming call from the outside line, the calling process is stopped and the outside line is held. In addition, the base unit and the cordless handset do not independently perform the ringer operation, so that a noisy feeling is not given.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cordless telephone according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a main part of a base unit of a cordless telephone according to an embodiment of the present invention. In the figure, reference numeral 1 denotes an RF module for wireless communication with a cordless handset (slave unit), which amplifies and demodulates an RF (Radio Frequency) signal from an antenna, outputs the signal to an MSK modem 2, and outputs an MSK modem. 2 is modulated into an RF signal, further amplified, and output to an antenna.

The MSK modem 2 is a microcomputer 3
And the RF module 1 modulate and demodulate the signal by the MSK method (minimum shift keying). The charge detection circuit 4 outputs to the microcomputer 3 a signal indicating whether or not the cordless handset is on-charged.

In the above configuration, a command output by performing some operation on the cordless handset (slave) is R
It is taken into the microcomputer 3 via the F module 1 and the MSK modem 2. The microcomputer 3 determines what kind of operation has been performed on the cordless handset (slave), and issues an instruction to the cordless handset (slave) as a command via the MSK modem 2 and the RF module 1.

Next, the operation when a cordless handset (slave unit placed on the master unit side) is called will be described with reference to the flowchart of FIG. When the cordless handset is off-charged, the cordless handset can be called when an outside line is reached. Further, after the line is captured by the base unit and the external line is put on hold, the cordless handset can be called by the key operation of the base unit.
In the above case, the calling operation of the cordless handset is started in step S1.

Next, in step S2, it is determined whether or not a key operation for a call is performed on the cordless handset. If a key operation has been performed, the process proceeds to step S3, where an outside-line call is performed using the cordless handset via the master unit.

If it is determined in step S2 that no key operation has been performed, the flow shifts to step S4 to determine whether or not the cordless handset has been charged to the base unit. If not, step S2 is repeated.

In step S5, the outside line is held (calling is stopped while the connection to the outside line is maintained), and the process proceeds to step S6. In step S6, it is determined whether or not the cordless handset is off-charged. If off-charge is performed, the process proceeds to step S3, where a call is made using the cordless handset, and if it is determined that the off-charge is not performed, step S3 is performed.
Move to 7.

In step S7, it is determined whether or not a key operation for talking on the master unit has been performed. If a key operation has been performed, the process proceeds to step S8, and a call is performed with the master unit.

If it is determined in step S7 that no key operation for talking has been performed on the master unit, step S6 is repeated.

During the above operation, if a busy tone is detected, the call is terminated and the apparatus enters a standby state. Also, after a call with the cordless handset or the base unit, a standby state can be set when the call is terminated by a key operation.

[0019]

According to the cordless telephone of the present invention,
When the cordless handset is turned on while the cordless handset is ringing, the calling process of the cordless handset is terminated, thereby eliminating discomfort caused by the ringing sound being disturbed by the cordless handset and the on-charged cordless handset continuing to ring. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a base unit of a cordless telephone according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the cordless telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 RF module 2 MSK modem 3 Microcomputer 4 Charge detection circuit

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Claims (2)

(57) [Claims] 1. A cordless telephone comprising a base unit provided with a loudspeaker and a cordless handset which is charged on the base unit, wherein the base unit is off-charged when receiving an outside line. A cordless telephone that performs a call process of the cordless handset when the call is in progress and stops the call process when the cordless handset is on-charged during the call process and holds an outside line. 2. The cordless telephone according to claim 1, wherein after the call processing is stopped and the outside line is held, if the cordless handset is off-charged, an outside line call is performed by the cordless handset via the base unit. A cordless telephone characterized by having such a configuration.