JP2648128B2 - Exchanger connection device for MCA - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MCA (multi-channel access) communication system, and more particularly to an MCA switch connecting device for connecting an MCA mobile station to a key telephone apparatus housed in a private branch exchange.

[0002]

2. Description of the Related Art Conventionally, this type of MCA switch connecting device will be described with reference to the drawings. FIG. 3 shows a configuration of a conventional MCA communication system using an MCA paging signal conversion adapter. MC using this MCA calling signal conversion adapter
In the A communication system, when a plurality of MCA mobile stations 1a to 1c call the telephones 7a and 7b accommodated in the fixed communication network 12, the MCA mobile stations 1a to 1c are operated in the same manner as when operating a normal MCA radio system. The MCA transmitting / receiving device 3 of the MCA command station 110 that has received the call number signal transmitted from the MCA command terminal 110 inputs the signal to the MCA command table 5,
The command console 5 sends a signal to the MCA calling signal conversion adapter 31. Then, the MCA calling signal conversion adapter 31 sends the telephones 7a to 7 based on the calling number signal included in the signal.
b internally generates a dial signal for calling the telephone corresponding to that number, and sends it to the private branch exchange 6 to connect one of the telephones 7a to 7b to the MCA command station 110 (Japanese Patent Laid-Open No. -267828).

[0003]

The above-mentioned conventional MCA
The call signal conversion adapter receives the call number in the MCA wireless system from the MCA command console, and the interface for receiving the signal differs depending on the MCA command console in the data system, communication system, and the like for each model. Therefore, M
A different CA call signal conversion adapter must be prepared depending on the connected MCA console.

Further, since the conventional MCA calling signal conversion adapter needs to be connected to the extension telephone connection interface of the private branch exchange to which the adapter is connected, the same interface as the extension telephone must be prepared by the private branch exchange to be connected. No.

[0005] For these reasons, there has been a problem that it is necessary to prepare an MCA calling signal conversion adapter having various different interfaces depending on the MCA command console and the private branch exchange to which the adapter is connected.

[0006]

According to the present invention, there is provided an MCA exchange connecting apparatus, comprising: a private branch exchange accommodating a plurality of key telephone apparatuses; and an MCA command station which is a master station of the plurality of MCA mobile stations. An exchange control means for controlling connection between the key telephone apparatus accommodated in the private branch exchange and the MCA mobile station connected to the MCA command station, and a selection signal transmitted from the private branch exchange Signal conversion means for converting a call number signal conforming to the call of the MCA mobile station, call number signal decoding means for decoding the call number signal transmitted from the MCA mobile station to determine whether the call is appropriate, An audible signal oscillating means for transmitting a signal for informing the private branch exchange of a use situation on the MCA mobile station side;
Switching control means for controlling the connection between the MCA command console constituting the A command station and the MCA transmitting / receiving device; processing means for controlling connection control between the key telephone device and the MCA mobile station through the exchange control means; Current supply means for supplying a current for detecting the state of the key telephone apparatus through exchange control means, and is provided in the MCA command station.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 2 shows a block diagram of one embodiment of the present invention. FIG.
FIG. 3 is a system configuration diagram of an MCA communication system using the MCA switch connecting device of the present embodiment shown in FIG.

In FIG. 2, a switching control circuit 27 connects and disconnects a communication path between the private branch exchange 6 and the MCA transmitting / receiving device 3. The audible sound signal oscillating circuit 26 oscillates a DT (dial tone) signal, a BT (busy signal) signal, an RG (call signal) signal, and an RBT (ringback tone) signal. The signal conversion circuit 24 converts a dial signal transmitted from the key telephone device of the private branch exchange 6 into a call number signal compatible with the MCA wireless system. The call number signal decoding circuit 22 decodes the call number signal sent from the MCA transmitting / receiving device 3 and sends the information to the exchange control circuit 27. The switching control circuit 21 switches the signal flow between the MCA command console 5 and the MCA transmitting / receiving device 3 by the switching control circuit 27. The current supply circuit 23 supplies power of 48 V to the private branch exchange 6. The CPU circuit 25 controls the exchange control circuit 27.

In FIG. 1, normal MCA mobile stations 1a to 1
c is the MCA of the MCA command station 11 via the MCA relay station 2.
Make a call with the command console 5. An MCA exchange connection device 4 connected to the private branch exchange 6 is connected between the MCA command console 5 and the MCA transmission / reception device 3. When calling the key telephone apparatuses 7a to 7b of the fixed communication network 12 from the MCA mobile stations 1a to 1c, for example, the MCA mobile station 1a sends out a call number signal of the MCA exchange connection device 4. M received the call
The switchboard connecting device 4 for CA is configured to receive the MCA from the MCA command console 5.
The control to the mobile stations 1a to 1c is cut off, and a 16 Hz 75 V RG signal is transmitted to the private branch exchange 6 in the same manner as the procedure in which the public exchange 8 calls the private branch exchange 6. The private branch exchange 6 that has received it is connected to the key telephone device 7
A ringing tone sounds for a to 7b. Key telephone devices 7a-
When any one of the telephones 7b picks up the handset, the communication line, which is the procedure of the line connection performed between the public exchange 8 and the private branch exchange 6, between the MCA exchange connection device 4 and the private branch exchange 6, A loop configuration is performed and a 16Hz 75V R
The transmission of the G signal is stopped, and a communication path is formed inside the MCA switch connecting device 4 between the MCA mobile station 1a and one of the key telephones 7a to 7b whose receivers are picked up.

The key telephone device 7 of the fixed communication network 12
When calling MCA mobile stations 1a-1c from a-7b,
For example, the receiver of the key telephone apparatus 7a is raised, and the interface of the line to which the MCA exchange connection device 4 is connected is selected from the plurality of lines connected to the private branch exchange 6. The private branch exchange 6 forms a loop on the communication line of the selected interface in the same manner as when the public exchange 8 is connected, and the DT signal is transmitted from the MCA exchange connection device 4 to the key telephone device 7a. Sent to the user. The calling number of the desired one of the MCA mobile stations 1a to 1c is pressed by dialing from the key telephone apparatus 7a. The MCA switch connecting device 4 converts the dial signal transmitted from the key telephone device 7a into the MC signal.
A Converts to a calling number signal compatible with the wireless system, MC
A Transmit to the transmitting / receiving device 3. MCA transceiver 3 is MC
A call path is set with the called station among the MCA mobile stations 1a to 1c via the A relay station 2. Key telephone devices 7a-
If the MCA command console 5 has already used the MCA transmitting / receiving device 3 when calling the MCA mobile stations 1a to 1c from 7b, the BCA is switched from the MCA exchange connecting device 4 to the key telephone device.
Sends out T signal.

Next, referring to FIG. 1 and FIG.
The call number signal received by the transmitting / receiving device 3 is transmitted to the switching control circuit 2
1 and enters the calling number signal decoding circuit 22. If the call number is the same as the predetermined call number, the switching control circuit 21
A signal from the A command console 5 is sent to the MCA transmitting / receiving device 3 and M
The MCA command table 5 is separated from the MCA transmitting / receiving device 3 so that the signal from the CA transmitting / receiving device 3 is not sent to the MCA command table 5, and the audible sound signal oscillation circuit 26 sends a 16 Hz 75V RG signal to the private branch exchange 6. The key telephone apparatuses 7a to 7b accommodated in the private branch exchange 6 ring a ringing tone when the private branch exchange 6 receives the RG signal, but if any of the key telephone apparatuses 7a to 7b raises the handset. , The communication path is the MCA exchange connecting device 4 and the private branch exchange 6
The audible signal oscillation circuit 26 stops sending the RG signal, and the exchange control circuit 27 connects the communication path between the MCA transmitting / receiving device 3 and the private branch exchange 6.

When the MCA mobile stations 1a-1c are called from the key telephone apparatuses 7a-7b, the key telephone apparatuses 7a-7c are called.
When any one of b selects the interface to which the MCA exchange connection device 4 of the private branch exchange 6 is connected and raises the handset, the private branch exchange 6 forms a loop of the communication path at the interface. When the CPU circuit 25 detects the loop configuration via the exchange control circuit 27,
The CPU circuit 25 transmits the DT signal from the audible sound signal oscillation circuit 26 through the exchange control circuit 27 to the key telephone devices 7a to 7b.
Out of the receiver. When the desired call number of the MCA mobile station 1a-1c is transmitted as a dial signal from the key telephone equipment 7a-7b, it is converted into a call number signal suitable for the MCA radio system by the signal conversion circuit 24, and the exchange control circuit. 27 to the MCA transmitting / receiving device 3 via the switching control circuit 21. At this time, the audible sound signal oscillating circuit 26 sends an RBT
Send a signal. When the called station of the MCA mobile stations 1a to 1c responds, the audible sound signal oscillation circuit 26
The transmission of the T signal is stopped, and the switching control circuit 27 couples the communication path between the key telephone units 7a to 7b and the MCA mobile stations 1a to 1c. When an attempt is made to call the MCA mobile stations 1a to 1c from the key telephone apparatuses 7a to 7b and the MCA command console 5 is already calling or talking to the MCA mobile stations 1a to 1c, the audible sound signal oscillation circuit 26 is used. Sends a BT signal to the key telephone devices 7a to 7b. When a communication path is established between the key telephone apparatuses 7a to 7b and the MCA mobile stations 1a to 1c, the CPU circuit 25 controls the MCA mobile stations 1a to 1 in the switching control circuit 27 from the key telephone apparatuses 7a to 7b.
The voice from c is monitored, and control is performed so that the voice input first to the exchange control circuit 27 is set to the transmission state, and the voice input later is received.

[0013]

As described above, according to the present invention, the connection method is the same as that of the public exchange, as compared with the method of connecting the MCA radio system to the private branch exchange using the conventional MCA paging signal conversion adapter. It can be connected to any private branch exchange regardless of the type of private branch exchange that can be connected, and the MCA wireless system can be connected to a fixed communication network to greatly expand the usable range.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an MCA communication system according to one embodiment of the present invention.

FIG. 2 is a configuration diagram showing an MCA exchange connecting apparatus of the embodiment.

FIG. 3 is a configuration diagram showing an MCA communication system using a conventional MCA paging signal conversion adapter.

[Explanation of symbols]

 1a-1c MCA mobile station 2 MCA relay station 3 MCA transmitting / receiving device 4 MCA switching device connection device 5 MCA command desk 6 Private branch exchange 7a-7b Button telephone device 8 Public switching device 11 MCA command station 12 Fixed communication network 21 Switching control circuit 22 Call number signal decoding circuit 23 Current supply circuit 24 Signal conversion circuit 25 CPU circuit 26 Audible sound signal oscillation circuit 27 Exchange control circuit

Claims (1)

(57) [Claims] 1. An MCA communication system including a private branch exchange accommodating a plurality of key telephone apparatuses and an MCA command station which is a master station of a plurality of MCA mobile stations, wherein the key telephone apparatus accommodated in the private branch exchange is Switching control means for controlling connection to the MCA mobile station connected to the MCA command station; and a selection signal transmitted from the private branch exchange to a call number signal suitable for calling the MCA mobile station. Signal conversion means for converting, call number signal decoding means for decoding a call number signal sent from the MCA mobile station to judge whether or not the call is appropriate, and usage status of the private branch exchange on the MCA mobile station side Audible sound signal oscillating means for transmitting a signal for notifying
Switching control means for controlling the connection between the MCA command console constituting the command station and the MCA transmitting / receiving device; processing means for controlling connection control between the key telephone device and the MCA mobile station through the exchange control means; Current supply means for supplying a current for detecting a state of the key telephone device through a control means, and provided at the MCA command station.