JPH0779455A - Cordless PBX - Google Patents

Abstract

(57) [Summary] [Purpose] To enable individual calls of cordless slave units in a cordless PBX. [Structure] A means for detecting an incoming call of the outside line circuit 7 (call circuit 3
1) In a cordless PBX having a DC circuit 32 forming a DC loop for response, a first means (second DT tone) for transmitting a signal requesting dialing of an individual number of a cordless cordless handset with a signal transmitted to the outside line side 11), second means for receiving and identifying the dial of the cordless cordless handset number from the outside line (control circuit 8), and third means (timer counter 13) for counting the timing when the second means becomes effective. The fourth means for controlling the control wireless circuit 17 for calling the cordless cordless handset from the individual number of the cordless cordless handset obtained from the second means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a cordless PBX used behind a host PBX.

[0002]

2. Description of the Related Art Generally, a cordless PBX is used as a host PBX.
When used in the behind, the external line of the cordless PBX is connected to the internal line of the host PBX. Normal host PBX
When calling the cordless cordless handset from the extension of the host, the host PB
Dial the extension number of X to call one of the outside lines of the cordless PBX. The control circuit of the cordless PBX which has detected an incoming call to the outside line is designed to perform the incoming call process to the cordless handset registered in advance on the outside line.

[0003]

With the above-described incoming call processing, there is only a method of calling all cordless slaves registered on the outside line at the same time. For this reason, when multiple cordless cordless handsets are registered as an incoming call line, multiple cordless cordless handsets simultaneously display the incoming call. There was a problem that the connection quality became extremely poor, such as the need to make a call.

By the way, one of the methods for individually calling one of the cordless cordless handsets registered in the outside line of the cordless PBX is to dial the cordless cordless handset number added to the extension number of the host PBX. However, if the cordless PBX is used behind, the absolute condition is that the host PBX can receive the additional dial. For this purpose, it is necessary to change the numbering plan of the host PBX, but it is usually impossible to change the numbering plan of the host PBX for the cordless PBX.

Therefore, in the present invention, the telephone of the extension of the host PBX can dial the telephone of the host PBX by dialing the conventional extension number, while the telephone of the conventional extension can be dialed to connect to the extension of the host PBX. The purpose is to call an outside line of a cordless PBX, and once a response is received, dial the number of the cordless cordless handset so that individual calls can be made.

[0006]

In order to achieve the above object, a cordless PBX of the present invention comprises means for detecting an incoming call of an outside line circuit and a DC circuit forming a DC loop for response, and sends it to the outside line side. Means for transmitting a signal requesting dialing of the individual number of the cordless cordless handset, second means for receiving and identifying the cordless cordless handset dial from the outside line, and the second means being effective. And a fourth means for controlling a control wireless circuit for calling the cordless slave unit from the individual number of the cordless slave unit obtained from the second unit.

[0007]

In the above structure, the caller is a cordless PB connected from the extension of the host PBX to the extension of the host PBX.
When the outside line of X is called, the incoming call is detected by the ordinary means of the cordless PBX, and when the DC loop is called, the incoming call is detected by the ordinary means of the cordless PBX and the DC loop is formed to form the voice communication circuit. Enables sending and receiving signals. That is, the first means transmits a signal indicating the dial reception of the cordless slave unit number to the extension side of the host PBX. The second means receives the dial of the cordless cordless handset from the extension. Further, the third means counts the timing when the dial of the cordless cordless handset is effective, and when the count is exceeded, the incoming call is displayed on all cordless cordless handset registered in advance in correspondence with the outside line. When the cordless cordless handset number is received within the timing, the control circuit of the fourth means controls the wireless I for control.
Call the cordless machine individually via the / F circuit.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is behind behind cordless P
It is a connection diagram of BX. In FIG. 1, 1 is a host PBX,
Reference numeral 2 is a dedicated telephone connected to the extension of the host PBX, and the host PBX 1 and the telephone 2 are connected to each other through a call line of 2W and a data line of 2W.

Reference numeral 3 is a cordless PBX main body, 4 and 5 are interface circuits in the cordless PBX, 4 is an external line circuit, and 5 is a wireless interface circuit.
Circuit, 6 is wirelessly connected to the cordless PBX 3 8
It is a cordless cordless handset.

FIG. 2 is a block diagram of the cordless PBX 3. In FIG. 2, reference numerals 7, 8, 9, and 10 denote external line circuits, and 31 of the external line circuits is a communication circuit, which usually has a bell signal detection circuit and has a function of detecting an incoming call from an external line. Further, 32 in the outside line circuit is a DC loop circuit which is a part of the communication circuit 31, 33 is a data transmission circuit, and normal incoming control is performed through this data.

Reference numeral 11 denotes a second dial tone circuit, and the frequency of this dial tone is changed so that it can be distinguished from the extension dial tone of the host PBX 1. Reference numeral 12 is a receiving circuit for the DTMF dial, which is the host PBX1.
It is a circuit for receiving and identifying a DTMF dial transmitted as a cordless cordless handset number from.

Reference numeral 13 is a timer counter. The timer counter 13 starts counting at the same time as the dial tone of the second dial tone circuit 11 is sent out. For example, after 3 seconds, the CPU of the control circuit 14 is interrupted to release the individual incoming call mode and correspond to the circuit of the outside line. Display all incoming cordless cordless handsets registered in advance.

The control circuit 14 is usually a CPU 40, P
IO41 (program I / O), ROM42, RAM4
It consists of three. The main control in this embodiment is the detection of an incoming call from the data transmission circuit in the outside line circuit 7, the formation of a DC loop in the communication circuit 31, the second dial tone circuit 1.
1 and the DTMF receiver circuit 12 are connected to the communication line of the outside line circuit 7, the crosspoint switch 16 is controlled, the DTMF dial received from the outside line is identified, the cordless handset number is selected from the DTMF dial, and this information is transmitted to the control wireless I. / F
The cordless cordless handsets 22 to 2 are transmitted to the circuits 17 to 21.
9 is a control for making individual calls.

Reference numeral 15 denotes a DTMF generator, which is a DTMF dial signal generating circuit which is sent when the cordless cordless handsets 22 to 29 dial the extension of the host PBX 1, but is not related to the present invention. Cross point switch 1
Reference numeral 6 connects the call lines of the outside line circuits 1 to 4 and the wireless I / F circuits 17 to 21, the second dial tone 11, the DTMF receiver 12 and the DTMF generator 15.

Of the wireless I / F circuits 17 to 21, four circuits 17 to 20 wirelessly transmit voice. Wireless I / F circuit 1
7-21 can talk to 4 cordless handsets at the same time.
The control wireless I / F circuit 21 transmits a control wireless signal such as an incoming call. And cordless cordless handsets 22-2
9 is sent in advance for each outside line of cordless PBX3,
There is registration for incoming control.

A series of operations will be described below with reference to FIGS. 2 and 3.
The flowchart will be described. First, when an incoming call is received from the host PBX, the incoming line code is detected by the data transmission of the data transmission circuit 33 in the external line circuit 7 or the incoming signal is detected by the bell signal detection circuit of the communication circuit 31 (# 51) and the DC loop circuit 32 forms a DC loop. That is, the host BPX is notified that it has responded (# 52), and at the same time, a call loop to the outside line circuit 7 is formed. Then, usually outside line 7-1
0 and the extension side (radio interface circuit) 17 to 21 are connected via the crosspoint switch 16, but in the present embodiment, the second DT 11 (dial tone) and D
Set the TMF receiver 12 to the X of the cross point switch 16.
1. Turn on X1 and connect to the communication line of the outside line circuit 7. Then, the second dial tone is sent to the host PBX side (# 53), and the caller dials the cordless handset number (# 5).
4). This dial signal is detected by the DTMF receiver 12 and transmitted to the control circuit 14, and the individual incoming call processing of the cordless cordless handset is performed (# 55). The control circuit 14 transmits the dialed cordless cordless handset to the wireless I / F circuit 21. The incoming call is displayed on the control channel (# 56), and when there is a response, a call link is created on the call channel, and X1 and X2 of the crosspoint switch 16 are turned off and X3 is turned on to turn on the host PBX1 and the cordless handset 6. A call circuit is formed (# 57).

When the timer 13 times out (# 58), all the cordless cordless handsets conventionally registered on the outside line are displayed as incoming calls (# 59), and thereafter all the cordless cordless handsets are displayed (#). 60), handset response / call (〓
61) but this is not according to the invention.

From the above extension of the host PBX1, individual calls can be made to a plurality of cordless slave units 6 of the cordless PBX3.

[0019]

As described above, the cordless PBX of the present invention
Is a cordless PBX having means for detecting an incoming call of an outside line circuit and means for a direct current circuit forming a direct current loop for response.
A first means for transmitting a signal requesting dialing of an individual number of a cordless slave unit by a signal transmitted to an outside line side; a second means for receiving and identifying a dial of a cordless slave unit number from an outside line side; A third means for counting the timing at which the second means becomes effective, and a fourth means for controlling a control radio circuit for calling the cordless slave unit from the individual number of the cordless slave unit obtained from the second means. The host PBX extension telephone can dial the conventional extension number to call the host PBX telephone, while the conventional extension number dials the host PB.
The cordless PBX that calls the outside line of the cordless PBX connected to the extension line of X, dials the number of the cordless cordless handset of the cordless PBX and can individually call the cordless PBX after receiving a response was realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a connection between a cordless PBX and a host PBX according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a cordless PBX according to an embodiment of the present invention.

FIG. 3 is a flowchart showing individual call control of a cordless slave unit in the cordless PBX.

[Explanation of symbols]

 1 Host PBX 2 Dedicated telephone 3 Cordless PBX 4 Cordless PBX external line circuit 5 Cordless PBX wireless interface circuit 6 Cordless handset 7-10 External line circuit 11 Second dial tone 12 DTMF dial receiver 13 Timer counter 14 Control circuit 15 DTMF dial generator 16 Cross Point Switch 17-21 Wireless Interface Circuit 22-29 Cordless Handset 31 Call Circuit That Makes Outer Line Circuit 32 DC Loop Circuit That Makes Outer Line Circuit 33 Data Transmission Circuit That Makes Outer Line Circuit

Claims (1)

[Claims] 1. A means for detecting an incoming call of an outside line circuit, and a direct current circuit forming a direct current loop for response, comprising: a signal sent to an outside line side, which sends a signal requesting dialing of an individual number of a cordless handset. One means, a second means for receiving and identifying a cordless cordless handset dial from the outside line, and a third means for counting the timing when the second means becomes effective.
And a fourth means for controlling a control wireless circuit for calling the cordless cordless handset from the individual number of the cordless cordless handset obtained from the second means.
X.