JP2576099B2 - Cordless telephone equipment - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a cordless telephone device, in which a plurality of parent devices connected to a plurality of telephones communicate over a plurality of wireless channels with a plurality of parent devices. The present invention relates to a cordless telephone device which transmits a call signal to another telephone when the telephone to be called is absent and enables a call response.

(Prior Art and Problems Thereof) This type of conventional system is composed of a portable telephone and a parent device connected to the telephone via a wireless line and connected to an exchange via a wired line. Further, the telephone and the parent device connected thereto usually have a specific affiliation relationship, and the telephone and the parent device other than the specific parent device are located within a short distance where radio communication is possible. Even if it is installed, communication is impossible, and even if a telephone other than the telephone in a specific combination with this specific parent device is in a short distance where wireless communication is possible, communication is impossible. there were.

This is a matter of course in a certain sense, and if the connection that was not possible was made possible without any conditions, it would result in a wrong connection, and thus a deliberate charge or a charge to the own telephone. There are adverse effects such as passing on to other phones. In order to avoid this, it has been a technical problem how to set up a communication line between the telephone and the corresponding parent device, and only between these specific devices.

The next issue is the limited coverage of a group of cordless phones. At present, cordless telephone services have been put into practical use in Japan, but the service area in this case is determined to be within a radius of 20 m around the parent device from the point of call quality. However, if a large number of workers are working or doing clerical work on the premises of a large company, and using a cordless telephone that is frequently moved and is portable, the range of activity often exceeds 20 m, and in this case, Even if a telephone is called to receive a call at a distance of 20 m or more from the parent device, the electric field strength is less than the required value, so that connection is not possible or communication quality is deteriorated, and it is inevitable that work efficiency is greatly reduced. At this time, 20m from the phone
As described above, even if another telephone is installed within this range, connection is not possible, and at present, cordless telephones for private use such as companies have only incomplete functions.

(Object of the Invention) In order to solve the above problems, the present invention relates to a cordless telephone mainly used in a business establishment of a company, and a telephone other than a specific telephone in which a parent device is connected to the parent device by a wireless line. In addition, by providing means that can be connected under specific conditions, even if a specific telephone is absent, if another telephone is present at that location, cordless communication can be ensured A telephone device is provided.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a plurality of parent devices 1 [(A) to (T)] of a cordless telephone device according to the present invention and a plurality of telephone devices 2.
2 shows an example of the configuration of [(A to T)].

At the time of standby of the cordless telephone configured as shown in the figure, the parent device and the telephone are waiting on the designated control channel.

First, a case where a call is received by the parent device (A) in FIG. 1 will be described. The parent device 1 (A) receives a call signal to which the self-identification control information (ID signal) unique to the telephone 2A to which the parent device 1A belongs. Is transmitted from the control unit 1-3 via the transmission unit 1-5 to the reception unit 2-2 of the telephone 2A via the control channel. As a result, on the output side of the receiving section 2-2 of the telephone 2A, the control section 2-3 constituted by a microcomputer or the like determines whether or not the self-identification control signal (ID signal) corresponding to its own telephone 2A is an ID memory. After confirming through the collating unit 2-1 and confirming that it is a self-identification control signal (ID signal), it transmits an incoming call response signal to the parent device 1 (A) and starts an incoming call operation. The sequence of this operation is shown in FIG.

That is, master device 1 (A) finds a communication channel that is not currently being used, switches to a predetermined communication channel using synthesizer oscillator 1-4, and instructs telephone 2A to switch to this communication channel. Telephone
In 2A, in accordance with an instruction from the parent device 1 (A), the synthesizer oscillator 2-4 is controlled using the control unit 2-3 constituted by a microcomputer or the like, and the communication channel is switched to the designated communication channel. ) Is sent out. Therefore, after confirming both channels are free and checking for interference, master device 1 (A) sends a bell ringing signal to telephone 2A to inform the user of the incoming call state. When the user off-hooks the telephone 2A, an off-hook signal is sent from the telephone 2A to the parent device 1 (A), and the control unit 2-3 of the telephone 2A switches the switch circuit 2-A.
6, 2-7 are turned on, the communication circuit 2-9 is connected to the receiving unit 2-2 and the transmitting unit 2-5, and the control unit 1-3 of the parent device 1 (A) is controlled.
Is a DC circuit (not shown) arranged on the local line side of the hybrid H, which connects the local line to the transmitting unit 1-5 and the receiving unit 1-2.
And between the office lines.

Thereafter, a call is started according to the sequence shown in FIG.

The above operation is a use state of the cordless telephone when the telephone 2A has a normal connection relationship with the parent device 1 (A).

However, as described above, if there is an incoming call to the parent device 1 (A), the problem is that if the telephone 2A belonging to the parent device 1 (A) is located near the parent device 1 (A). However, if the user is not present in the area of the parent device 1 (A), no incoming response signal from the telephone 2A to the incoming signal from the parent device 1 (A) is obtained, and even if the parent device 1 (A) Even if there is a telephone 2B belonging to another parent device 1 (B) in the area, the telephone 2B cannot answer the incoming call because the self-identification control signal (ID signal) does not match. At the same time, the parent device 1
The user of another telephone in the area (A) is the parent device 1
(A) was in a state where it was not even understood that an incoming call had arrived. In such a state, from the viewpoint of the caller, many callers would like to answer another nearby telephone even if the calling telephone 2A does not necessarily answer. That is, the caller does not call the individual, but calls the group or the person in charge.

In order to solve the problems described above, in the present invention, as shown in FIG. 3, a self-identification control signal (ID signal) added to an incoming call signal, And a common code section which is set in common to the telephones. Each telephone is provided with a timing circuit 2-8 which operates under specific conditions in response to an incoming call signal from the parent device. The identification code portion and the common code portion of the self-identification control signal (ID signal) are collated by the ID memory collation portion 2-1. If the incoming signal from the parent device continues after a certain period of time,
A response signal is sent to the parent device. In the cordless telephone device configured as described above, the parent device 1 that is transmitted through a control channel common to the system is used.
An incoming call signal from (A) is transmitted to a telephone set having a common code part of the same self-identification control signal (ID signal) as the telephone set 2A when the telephone set 2A is located in the area of the parent device 1 (A). Considering the case where 2B also exists, as shown in the flow chart of FIG. 4, the telephone 2A responds to the incoming call according to the procedure shown in FIG. 2 to form a communication path. At this time, the telephone 2B identifies that there is no incoming call to itself by comparing the identification code part and the common code part of the self-identification control signal (ID signal), and starts counting by the clock circuit. Thereafter, when the telephone 2A responds to the incoming call, the incoming signal from the parent device 1 (A) stops, so that
Upon detecting this, the operation of the timing circuit is stopped, and the system is configured to wait for the next incoming call. FIG. 4A shows the sequence of the above operation.

On the other hand, if the telephone 2A is not present in the area, the telephone 2B receives the incoming call signal from the parent device 1 (A), and the ID memory collating unit 2-1 generates the self-identification signal (ID signal). The counting circuit 2-8 is activated when it is determined that the call is not an incoming call by collating the identification code portion and the common code portion, and the counting circuit 2-8 is activated for a predetermined time (for example, 5 to 6 times for a normal bell signal, 15 seconds). (After about 20 seconds), if the incoming signal is not stopped from the parent device 1 (A), as described above,
An incoming call response signal is sent to (A). The parent device 1
(A) shows only the common code part of the self-identification control signal (ID signal) of the telephone 2B that has received another call, assuming that there is no response from the telephone 2A to the incoming call to the telephone 2A for a predetermined time. And sends a bell ringing signal to the telephone 2B if they match. FIG. 4B shows the sequence of the above operation. The operation after transmitting the bell ringing signal to the telephone 2B is performed according to the flow of FIG.
Based on the off-hook operation of 2B, the office line lube is closed to enable a call.

In the above description, the setting of the common code portion of the self-identification control signal (ID signal) has been described for the two telephones 2A and 2B. However, the setting of the common code portion for a plurality of telephones may be determined as needed. By deciding the priorities and the like, more detailed management can be performed.

Further, the collation of the common code portion of the self-identification control signal may not be performed when the incoming call signal is received, but may be configured so that only the common code portion is collated after a certain period of time.

Note that the ID signal constituting the common code shown in FIG. 3 is an example, and the effect of the present invention is not changed by other methods.

(Effects of the Invention) As described above, according to the present invention, when a telephone other than the telephone belonging to the parent device is made to answer the incoming call, a common code part is set for a plurality of telephones, and thereby the parent device is set. Self-identification control signals (ID signals) for multiple telephones in the device
Need not be stored, there are advantages such as saving memory capacity, minimizing the common control channel occupation time, and allowing a caller to respond within a fixed time.

[Brief description of the drawings]

FIG. 1 is an example of a configuration of a system according to the present invention, FIG. 2 is an example of a flowchart showing a sequence of outgoing and incoming calls, and FIG.
FIG. 4 is a format example of a self-identification control signal (ID signal) according to the present invention, and FIGS. 4A and 4B are flowcharts for explaining the operation of the present invention. 1. Parent devices (A) to (T), 2. Phones A to T, 1-1, 2-1 ... ID memory collation unit, 1-2, 2-2 ... Receiving unit, 1-3 , 2-3 ... Control section 1-4,2-4 ... Synthesizer oscillator 1-5,2-5 ... Transmission section 1-6,1-7,2-6,2-7 ... Switch circuit, 1-8, 2-8: Clock circuit 2-9: Communication circuit.

Claims (1)

(57) [Claims] A plurality of sets of a cordless telephone device comprising a parent device connected to an exchange via a wired line and a telephone set connected by a wireless line within a service area of the parent device use one or more radio channels. In a cordless telephone device to be shared, a self-identification control signal of a telephone belonging to a parent device connected to the wireless line is set to be partially shared with a telephone belonging to another parent device, and a call from the line is set. Means for transmitting an incoming call signal with a self-identifying control signal of the telephone; and another parent sharing a part of the self-identifying control signal with the telephone when no incoming response signal is issued from the telephone. Means for transmitting a bell ringing signal to the other telephone connected to the other parent device when receiving an incoming call response signal from another telephone connected to the device; and First determining means for determining whether a part of the self-identification control signal is shared with the incoming call signal, and continuing the incoming signal from the parent device for a predetermined time based on the determination by the first determining means And a telephone having a means for transmitting an incoming call response signal to the parent device based on the judgment of the second judging means. Cordless telephone equipment.