JPH0482498A - Cordless key telephone system - Google Patents

Abstract

PURPOSE:To enable a transmission from a base set to a hand set without any interference on a radio communication at the time of an incoming call to a trunk line by providing an extension number setting circuit at each base set, and setting the individual extension number at the each base set. CONSTITUTION:The extension number is preliminarily set by an extension number setting circuit 13 in each base set 15, and either of control channels C1 and C2 capable of being used on the radio communication is decided according to this extension number. Moreover, a timing of the time in which each control channel can be used is decided. Therefore, when a call is simultaneously generated, the changeover control of either the control channel C1 or the control channel C2 is operated by a radio control circuit 20 in such a changeover timing. Thus, the radio communication of the destination data can be smoothly operated from the circuit 20 through an RF unit 11 to each hand set 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field The present invention has a plurality of base sets connected to one main device through a bus line, and wireless communication between the base sets and wirelessly connected handsets. The present invention relates to a cordless button telephone device that allows for smooth operation.

BACKGROUND OF THE INVENTION FIG. 2 shows the configuration of a conventional cordless button telephone device. In Fig. 2, 1 is the main device, and the station arrival circuit 2
, a control circuit 3, and a data interface circuit (hereinafter referred to as a data I/F circuit) 4. Reference numeral 5 denotes a base server), which is connected to the main device 1 through a bus line 6 having a central office line 6a and an extension line 6b, and is also connected to a handset 7 by wireless communication. The base set 5 also includes a data I/F circuit 8, a control circuit 9, a wireless control circuit 1°, and an RF unit 11. Further, a plurality of base sets 5 and hunt sets 7 attached thereto are connected to the bus line 6.

Next, the operation of the above conventional example will be explained. In FIG. 2, when a central office line call is received to this cordless button telephone device, a central office terminating circuit 2 in the main device I operates and supplies a central office terminating signal to a control circuit 3. In this case, the control circuit 3
/F circuit 4, inside bus line 6, extension line 6
The station-arriving data corresponding to the station-arriving signal is transmitted to each base set 5 via b. Then, each base set 5 confirms that the incoming call is received via the control circuit 9 via the data I/F circuit 8, and sends it to the radio control circuit IO. The radio control circuit 10 transmits station arrival data to the handset 7 through the RF unit 11 using a control channel. As a result, the handset 7 performs a ringing operation indicating that there is an incoming call on the central office line.

In this way, by using the control channel in the conventional cordless button telephone device described above, each handset 7 can perform a ringing operation to indicate that a central office line call has been received.

Problems to be Solved by the Invention However, in the conventional cordless button telephone device described above, incoming station data from the main device 1 is sent to each base set 5 at the same time. For this reason, each base set 5 tries to use the control channel at the same time to perform wireless communication with each handset 7, so a so-called collision occurs in wireless communication. There was a problem that the email could not be sent.

The present invention solves these conventional problems and provides an excellent cordless button telephone device that can transmit an incoming call from the base set to the handset without causing a collision on wireless communication. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention provides each base set with an extension number setting circuit, and controls the control channel CI (4) based on the extension number assigned in advance to each base set.
6ch) or control channel C2 (89ch) to be used, and also controls the timing of using the control channel.

Operation Therefore, according to the present invention, when a central office line call is received,
The main device sends the incoming data to the base set through the bus line, and the base set is assigned a predetermined extension number, so that the base set and handset, which constitute the cordless button telephone device of the system, are This has the effect that it is possible to transmit station-arrived data to other base sets and handsets without causing collisions in wireless communication.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, the same reference numerals as those shown in FIG. 2 indicate the same components. In Figure 1,
Reference numeral 1 denotes a main device, which has a station arrival circuit 2, a control circuit 3, and a data interface circuit (hereinafter referred to as a data I/F circuit) 4. A base set 15 is connected to the main device 1 through a bus line 6 having a central office line 6a and an extension line 6b, and is also connected to a handset 7 by wireless communication. The base set 15 also includes a data I/F circuit 8, a control circuit 19, a wireless control circuit 20.
It has an RF unit 11 and an extension number setting circuit 13. Furthermore, a plurality of base sets and handsets attached thereto (not shown) are connected to the bus line 6.

The data I/F circuit 8 sends and receives data to and from the main device 1. The control circuit 19 is connected to the data I/F circuit 8 and transmits and receives data. The extension number setting circuit 13 is connected to the control circuit 19, has an individual extension number set in advance for each base set 15, and sends a control channel switching signal to the radio control circuit 20. The radio control circuit 20 is connected to the control circuit 19, and switches the control channel to control channel CI (46ch) or control channel C2 (89ch) according to the switching timing signal and sends data to the RF unit 11. be.

Next, the operation of the above embodiment will be explained.

In the above embodiment, when the cordless button telephone device receives an incoming office line call, the incoming office line call is detected by the office terminating circuit 2 of the main unit 1, and the terminating signal from the office terminating circuit 2 is sent to the control circuit 3. Sent out. The control circuit 3 outputs station arrival data corresponding to the station arrival signal, and sends this to each base set 15 via the I/F circuit 4 and the extension line 6b.

Each base set 15 recognizes from the above-mentioned station arrival data that it is a station line incoming call through the control circuit 9 through each data I/F circuit 8. In this case, in each base set 15, an extension number is determined in advance by the extension number setting circuit 13, and a control channel CI or a control channel C2 that can be used for wireless communication according to the extension number is set in advance. One of them is determined, and the timing at which each control channel can be used is also determined. At such switching timing, the wireless control circuit 20 performs switching control of the control channel CI or the control channel C2.

Therefore, wireless communication of station-arrived data can be smoothly performed from the radio control circuit 20 to each handset 7 via the RF unit 11, and each handset 7 makes a station-arrived ring and reaches the station-arrived state.

In this way, according to the above embodiment, each node set 1
By setting individual extension numbers to the handsets 15, collisions in wireless communication between the respective handsets 15 do not occur. As a result, when a plurality of base sets 15 are connected in one system, the control channel can be used effectively, so that wireless communication can be carried out smoothly.

Effects of the Invention As is clear from the above embodiments, the present invention provides an extension number setting circuit for each base set and sets an individual extension number for each base set, thereby controlling the control channel CI or control channel for wireless communication. Since it is decided in advance which channel of C2 will be used, and the timing at which each control channel can be used is also determined, - When calls occur all at once in the cordless button telephone devices of the system, for example, Even in the case of station arrival, extension-calling, etc., there is an effect that data can be transmitted to the handset without causing a collision between the base sets on the wireless communication.

That is, it has the effect that control channels can be used effectively within the system.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a cordless button telephone device according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a conventional cordless button telephone device. DESCRIPTION OF SYMBOLS 1...Main device, 8...DeRF unit, ...Control circuit, 2 6...Bus line, 7...Handseter interface circuit, 11...13...Extension line Number setting circuit, 19 0... Radio control circuit.

Claims (1)

[Scope of Claims] A main device; and at least two base sets connected to the main device through a bus line; the base set includes a data interface circuit for transmitting and receiving data to and from the main device; a control circuit connected to this data interface circuit to transmit and receive data; an extension number setting circuit connected to this control circuit and having an extension number set in advance and outputting a control channel switching timing signal; A cordless button telephone device comprising: a radio control circuit connected to an extension number setting circuit and switching control channels according to the switching timing signal; and an RF unit connected to the radio control circuit.