JPH07321922A - Cordless telephone set with di function - Google Patents

Abstract

PURPOSE:To obtain especially a cordless telephone set with a DI function, which is capable of calling a master or slave set by designation by a caller concerning a telephone set calling system. CONSTITUTION:The cordless telephone set with the DI function, which is provided with not less than one slave set connected to the master set by radio, is provided with a circuit 1 by which the master set detects the polarity of a telephone line, a circuit 3 detecting an extension designingating signal received by DI, a storage part 10 for storing the relation between the extension designating signal and an opposite side (a master or slave set), and a control part 6 controlling them. Thereby, before responsing for the purpose of a speech, this telephone set can receive a signal similar to an extension number and call the corresponding master or slave set so as to unnecessitate a call charge during calling.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone calling system, and more particularly to a cordless telephone with a DI function that can call a master unit or a slave unit by designating a caller.

2. Description of the Related Art In a conventional cordless telephone, in order for a caller to designate and ring a master unit or a slave unit, a method of receiving an extension number by a PB signal from the caller, so-called direct in dial (hereinafter referred to as DID) ) Was known. In the DID, the cordless telephone needs to answer once in order to receive the extension number by the PB signal from the caller, and the caller needs a call charge before making a call with the other party.

DISCLOSURE OF THE INVENTION The present invention does not receive a callee designation signal from a caller during a call as in a conventional cordless telephone, but rather joins the cordless telephone when receiving a call. It is an object of the present invention to provide a cordless telephone in which a call charge before making a call with the other party is unnecessary by receiving a call destination designation signal from a private branch exchange.

A cordless telephone with a DI function of the present invention is a cordless telephone equipped with one or more cordless handsets wirelessly connected to a parent device, and the parent device is a telephone line. A circuit for detecting the polarity, a circuit for detecting the extension designation signal received by DI, and a storage unit for storing the relationship between the extension designation signal and the called party (master unit or slave unit),
And a control unit for controlling them.

Before the response for the purpose of the call, the signal similar to the extension number is received and the corresponding master unit or slave unit can be called.
As a result, the call charge during the call is no longer necessary.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of a base unit of a cordless telephone of the present invention. 2 and 3 are sequence diagrams showing the control procedure of the master unit of the cordless telephone of the present invention. In order to solve the above problems, the base unit of the cordless telephone of the present invention is a circuit 1 for detecting the polarity of a telephone line.
, A circuit 2 for detecting a ringing signal, a circuit 3 for detecting an extension designation signal received by DI, a circuit 4 for controlling a DC loop, a speech network circuit 5, a wireless controller 7, and an operation reception. The operation unit 8, the display unit 9 for displaying the operation state of the operation unit or the operating state of the system, the storage unit 10 for storing the relationship between the extension designation signal and the calling party (master unit or slave unit), and A control unit 6 for controlling is provided. To use the DI function with this cordless telephone, first, the control unit 6 is operated by operating the operation unit 8.
It is necessary to previously register the relationship between the extension designation signal of DI to DI and the called party (master device or slave device) in the storage unit 10. The polarity reversal of the telephone line is detected by the polarity detection circuit 1.
The calling signal is detected by the calling signal detection circuit 2. The control unit 6 that has received the detection signal forms a DC loop and then detects the extension designation signal from the telephone line by the extension designation signal detection circuit 2 and receives the detection signal.
Calls the corresponding parent device or child device according to the previously registered relationship. The control unit 6 that has completed the call disconnects the DC loop.

The cordless telephone of the present invention receives a signal similar to an extension number before a response for the purpose of making a call.
It is possible to call the corresponding master unit or slave unit, and there is an effect that the call charge during the call is unnecessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a base unit of a cordless telephone of the present invention.

FIG. 2 is a sequence diagram showing a control procedure of a base unit of the cordless telephone of the present invention.

FIG. 3 is a sequence diagram showing a control procedure of a base unit of the cordless telephone of the present invention.

[Explanation of symbols]

 1. Polarity detection circuit 2. Ring signal detection circuit 3. Extension designation signal detection circuit (PB signal detection circuit) 4. DC loop control circuit 5. Speech network circuit 6. Control unit 7. Wireless control unit 8. Operation part 9. Display unit 10. Memory

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Claims (1)

[Claims] 1. A cordless telephone having one or more cordless handsets wirelessly connected to a master unit, wherein the master unit has a circuit for detecting the polarity of a telephone line and a circuit for detecting an extension designation signal. Owned, telephone line dial-in service (hereinafter D
D) comprising control means for calling the corresponding master unit or slave unit according to the extension designation signal received in I).
Cordless telephone with I function.