JP2712333B2 - Subscriber concentrator communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to connecting a general subscriber telephone network and a base station via a plurality of subscriber lines to which a representative number is assigned, and connecting with a base station. The present invention relates to a subscriber concentrator communication system in which a plurality of slave stations are connected via a line concentrating transmission line such as wireless, and a terminating connection from a general subscriber telephone network to a slave station is made by a second dial system.

(Prior Art) It accommodates mobile communication terminals such as car phones, and terminal devices that are difficult to receive ordinary general public telephone services due to terrain, economic reasons, etc., and makes it possible to economically communicate with general subscriber telephone networks. As a means for realizing this, a slave station including a mobile communication terminal device such as an automobile telephone is connected to a base station via a concentrating transmission line such as a radio, and this base station is connected to a general subscriber telephone network, and a representative number is assigned. A subscriber line communication system that connects through a plurality of assigned subscriber lines is used.

In a communication system of this type, an incoming call from a general telephone network to a slave station is transmitted from a switch of the general telephone network in the form of a ringing signal via one of a plurality of subscriber lines to a base station. The base station detects this call signal, and if there is an idle communication channel on the transmission path between the base station and the slave station, performs a call response (equivalent to off-hook of the telephone) and sends the call signal through the subscriber line. Subsidiary subscriber number (second dial number) for calling subscribers of the subscribed telephone network
A voice or tone for prompting the transmission of a call is transmitted, and the incoming call of the slave station is called according to the second dial number sent according to the voice or the tone, and the above-mentioned free call channel is allocated to make a call connection. To do.

(Problems to be Solved by the Invention) However, if there is an incoming call to the slave station in a state where there is no available communication channel, the base station cannot allocate the communication channel. The question is how to deal with the problem. That is, it is contrary to the fact that the base station gives the calling subscriber, for example, a "busy" notification, and it is necessary to pay a fee for giving any response even when the actual call is not made. Is not preferred. Therefore, conventionally, the base station responds to an incoming call in a state where the communication channel has free space,
No response is made to an incoming call when there is no available communication channel.

However, this would require the calling subscriber to retry uselessly or give up on the call, resulting in reduced service and a need for improvement.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a subscriber of a general telephone network who has made a call when there is no available communication channel with unnecessary retries and calls. An object of the present invention is to provide a subscriber line communication system that can take appropriate measures without giving up.

(Means for Solving the Problems) In order to achieve the above object, the subscriber line communication system of the present invention has the following configuration.

That is, a subscriber line communication system according to a first aspect of the present invention includes a base station connected to a general subscriber's telephone network via a plurality of subscriber lines to which a representative number is assigned, and a base station and a line transmission line. And a plurality of slave stations connected via a telephone line, wherein an incoming call from the general subscriber telephone network to the slave station is performed by a second dial system using a second dial number as a subscriber number of the slave station. In a subscriber line communication system, the base station closes a transmission line to a calling subscriber of the general telephone network in response to an incoming call from the general telephone network to the slave station that occurs while the line transmission line is blocked. Sending prompting means for notifying the calling subscriber and prompting the calling subscriber to send out the telephone number of the calling subscriber and the subscriber number of the called slave station; and Sent from the calling subscriber Storage means for storing the telephone number of the calling subscriber and the subscriber number of the called remote station; accessing the storage means in response to the vacancy of the concentrator transmission line; Connection means for calling and connecting both the call subscriber and the called remote station. Also, a subscriber line communication system according to a second invention of the present invention is a base station connected to a general subscriber telephone network via a plurality of subscriber lines assigned a representative number, and the base station and the line transmission line. And a plurality of slave stations connected via a telephone line, wherein an incoming call from the general subscriber telephone network to the slave station is performed by a second dial system using a second dial number as a subscriber number of the slave station. In a subscriber line communication system, the base station closes a transmission line to a calling subscriber of the general telephone network in response to an incoming call from the general telephone network to the slave station that occurs while the line transmission line is blocked. A sending facilitating means for notifying the caller and promoting and executing the sending of the telephone number of the calling subscriber, and a telephone call of the calling subscriber sent from the calling subscriber based on the sending facilitating means. Storage means for storing numbers Receiving the vacancy in the concentrator transmission line, accessing the storage means, calling the calling subscriber, and transmitting the subscriber number of the called partner station, whereby the called partner station is Connection means for calling and connecting between the two.

Further, a subscriber line communication system according to a third invention of the present invention is a base station connected to a general subscriber telephone network via a plurality of subscriber lines to which a representative number is assigned, and a base station and a line transmission line. And a plurality of slave stations connected via a telephone line, wherein an incoming call from the general subscriber telephone network to the slave station is performed by a second dial system using a second dial number as a subscriber number of the slave station. In a subscriber line communication system, the base station closes a transmission line to a calling subscriber of the general telephone network in response to an incoming call from the general telephone network to the slave station that occurs while the line transmission line is blocked. Sending promotion means for notifying that the call is in progress, and promoting and executing transmission of a subscriber number of the called party's slave station and a message to the called party's slave station, and the calling subscriber based on the sending promotion means. Before sent from Storage means for storing a subscriber number of a called party's slave station and a message to the called party's slave station; accessing the storage means in response to the vacancy of the concentrator transmission line; Connection means for calling a slave station and transmitting a message from the calling subscriber;
It is characterized by having.

(Operation) Next, the operation of the subscriber line communication system of the present invention configured as described above will be described.

If an incoming call is received from the general telephone network while the concentrator transmission line is blocked, the base station notifies the calling subscriber that the transmission line is blocked and performs one of the following three operations. First, the telephone number of the calling subscriber and the subscriber number of the partner station are obtained from the calling subscriber, and a connection is established between the two when the communication channel becomes free. Second, the telephone number is first obtained from the calling subscriber, and when the communication channel becomes free, the calling subscriber is called to obtain the subscriber number of the remote station, and the connection between them is established. Thirdly, the subscriber number of the called slave station and a message to the slave station are obtained from the calling subscriber, and the message is transmitted to the slave station when the communication channel becomes available.

In this way, the calling subscriber of the general telephone network can achieve the initial purpose without wasting retry or giving up the call.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an overall configuration example of a subscriber line concentrator system according to one embodiment of the present invention. This subscriber line concentrating system comprises a general subscriber telephone network exchange 1 and a plurality of subscriber lines (# 1, # 2,..., #
n), and a plurality of slave stations (100-100) connected to the base station 10 via a wireless line which is a concentrator transmission line.
1,100-2, ..., 100-k). One representative number is assigned to a plurality of subscriber lines (# 1, # 2, ..., #n),
Each slave station is given a second dial number as a subscriber number.

The base station 10 includes a subscriber line interface circuit (20-1 to 20-1).
20-n), a communication path switch 30, a radio interface circuit (40-1 to 40-m), a radio transceiver 50, a temporary storage circuit 60, and a main control unit 70. You.

The subscriber interface circuit (20-1 to 20-n) interfaces the subscriber line from the general telephone network exchange 1, and transmits call connection information such as outgoing / incoming calls and call termination via the data bus to the main control unit 70. Input and output.

Under the control of the main control unit 70, the speech path switch 30 converts n signals of the subscriber line interface circuits (20-1 to 20-n) into m speech channels (m) on the transmission path between the base station and the slave station. m is a positive integer of m <n).

The radio interface circuit (40-1 to 40-m) interfaces with the radio transceiver 50, and inputs / outputs call connection information such as a call from a slave station and a call termination to / from the main control unit 70 via a data bus. I do.

The temporary storage circuit 60 is a storage means provided for implementing the present invention, and is controlled by the main control unit 70 via a data bus, and according to the first invention, the temporary storage circuit of the calling subscriber of the general telephone network. The telephone number and the subscriber number (second dial number) of the called slave station, the telephone number of the calling subscriber in the second invention, and the second dial number and the called party of the called slave station in the third invention Any of the messages to the predecessor station are stored.

The main control unit 70 includes a subscriber line interface circuit 20-1 to
20-n, speech path switch 30, radio interface circuit
40-1 to 40-n together with the transmission facilitating means and the connecting means to manage and control the entire subscriber concentrator communication system such as allocation control of the communication channel on the radio transmission path, and to control the communication channel on the radio transmission path. Performs the incoming call connection control according to the present invention when there is an incoming call to the slave station from the general subscribed telephone network that occurred during the blockage. The slave stations (100-1 to 100-k)
The inclusion of a mobile communication terminal such as a car phone is the same as in the prior art.

Next, with reference to FIGS. 2 to 4, the incoming call connection control according to the present invention, that is, an incoming call from the general subscriber's telephone network to a slave station when all the communication channels of the wireless transmission path are busy. Will be described.

FIG. 2 is an operation sequence diagram of the first invention of the present invention. In FIG. 2, when a subscriber of the general subscriber telephone network goes off-hook, a dial tone is sent from the exchange 1 to the calling subscriber, so that the calling subscriber first follows a normal telephone connection procedure. The base station 10 is called by dialing the representative telephone number of the base station 10. The exchange 1 receiving the connection request from the calling subscriber to the base station 10 selects the free subscriber line # 1 from the n subscriber lines # 1 to #n assigned the same representative number, and performs ringing. A signal is transmitted to make an incoming call of the base station 10.

The base station 10 that has received the call via the subscriber line # 1 receives the ringing signal in the subscriber line interface circuit 20-1 and notifies the main control unit via the data bus of the occurrence of the incoming call.
Report to 70. Upon receiving the notification, the main control unit 70 checks the use status of the communication channel, and if all the communication channels are busy and the concentrator transmission line is blocked, the response by the busy processing procedure, that is, there is no free communication channel. It instructs the subscriber line interface circuit 20-1 via the data bus to notify and transmit the telephone number of the calling subscriber and the second dial number of the called remote station. Main controller 70 at the same time
Instructs the speech path switch 30 to connect the subscriber line interface circuit 20-1 and the temporary storage circuit 60, and to the temporary storage circuit 60,
-1 and waiting for the calling subscriber's telephone number by the PB signal from the calling subscriber and the second dial number of the called remote station, and the calling subscriber sent Instructs the temporary storage of the telephone number and the second dial number of the called slave station. As a result, the subscriber line interface circuit 20-1 sends a call response (off-hook) to the exchange 1.
After completing the communication path setting of the general subscriber telephone network, the calling subscriber is notified of the busy channel of the subscriber concentrator communication system, and then the calling subscriber telephone number and the called party The transmission request of the second dial number of the station is sequentially performed. This is done by voice or tone signals. The calling subscriber telephone number sent from the calling subscriber and the second dial number of the called remote station are stored in the temporary storage circuit 60, respectively. Then, the calling subscriber goes on-hook according to a normal procedure. As a result, the subscriber line communication system is disconnected from the general subscriber telephone network.

On the other hand, the main control unit that manages and controls the speech channel
In 70, a temporary storage circuit 60
Is checked, and if a call waiting signal is stored, an empty line among the subscriber lines # 1 to #n is selected, and the empty line, for example, the subscriber line interface corresponding to the subscriber line # 2 is selected. The circuit 20-2 is controlled to cause the exchange 1 to perform an off-hook operation. Then, after waiting for the reception of the dial tone, the calling subscriber number stored in the temporary storage circuit 60 is transmitted to the subscriber line interface circuit via the communication path switch 30.
20-2, and the calling subscriber number is transmitted to the subscriber line # 2. That is, the calling subscriber is automatically called.
At the same time, the main control unit 70 controls the paging of the called slave station and the assignment control of the speech channel according to the second dial number of the called party slave station stored in the temporary storage circuit 60, and the assignment control of the speech channel of the radio transmission path. Instructs the control channel radio interface circuit 40-1 to be used for the communication control, and also controls the connection between the subscriber line interface circuit 20-2 and the allocated call channel radio interface circuit via the speech path switch 30. I do. As a result,
When each of the calling subscriber and the called slave station goes off-hook, both parties enter a talking state.

Next, FIG. 3 is an operation sequence diagram of the second invention of the present invention. In FIG. 3, when the concentrator transmission line is blocked, the base station notifies the calling subscriber of "no available communication channel" and requests transmission of the calling subscriber telephone number. The calling subscriber goes on-hook after transmitting the telephone number. The telephone number of the calling subscriber is stored in a temporary storage circuit 60.
Is stored in Then, the main control unit 70 checks the temporary storage circuit 60 each time a communication channel becomes available, and calls the calling subscriber in the same procedure as described above.

When the calling subscriber answers by going off-hook, the main control unit 70
Causes the corresponding subscriber line interface circuit to transmit a signal requesting transmission of the second dial number of the called slave station. The corresponding subscriber line interface circuit notifies the main control unit 70 of the second dial number sent from the calling subscriber. The main control unit 70 controls the paging of the called slave station and the allocation control of the communication channel according to the second dial number, and the control channel radio interface circuit used for the control of the allocation of the communication channel of the radio transmission path.
An instruction is given to 40-1 and the connection between the corresponding subscriber line interface circuit and the assigned communication channel radio interface circuit is controlled via the communication path switch 30. As a result, a call is made between the calling subscriber and the slave station.

Finally, FIG. 4 is an operation sequence diagram of the third invention of the present invention. In FIG. 4, when the concentrator transmission line is blocked, the base station notifies the calling subscriber that "the communication channel is not available", and the second dial number of the called slave station and the called party. Request transmission of a message to the precedent station. The calling subscriber goes on-hook after responding to this request. The second dial number of the destination station and the message are stored in temporary storage circuit 60.

Then, when the communication channel is vacant, the main control unit 70 confirms that the transmission message is stored in the temporary storage circuit 60, calls the corresponding slave station according to the second dial number stored therein, and When the mobile station responds by going off-hook, the mobile station transmits a message via an available communication channel. The slave station goes on-hook after receiving the message.

(Effects of the Invention) As described in detail above, according to the subscriber line communication system of the present invention, from the subscriber of the general telephone network in which the transmission path between the base station and the slave station has been closed to the slave station. In response to the incoming call, the base station once responds, notifying the calling subscriber that the concentrator transmission line is blocked, and also calling the calling subscriber's telephone number, the second dial number of the destination slave station, and the like. Send a message or the like to the other station of the other party and memorize them,
Automatic call connection or message transmission when a call channel becomes available allows the calling subscriber of the general telephone network to achieve its initial purpose without wasting retry or giving up the call. And the service can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a subscriber line communication system according to one embodiment of the present invention, and FIGS. 2 to 4 are diagrams respectively showing the relationship between a base station and a slave station in the first to third inventions of the present invention. FIG. 9 is an operation sequence diagram showing an example of a connection control procedure for an incoming call from a general subscriber telephone network to a slave station that has occurred while a transmission line is blocked. 1 ... General subscriber telephone network exchange, 10 ... Base station of subscriber line communication system, 20-1 to 20-n ... Subscriber line interface circuit, 30 ... Speaker switch, 40-1 to 40-m …… Wireless device interface circuit, 50 …… Wireless transceiver, 60 ……
Temporary storage circuit, 70... Main control unit, 100-1 to 100-k...

Claims (3)

(57) [Claims] 1. A base station connected to a general subscriber's telephone network via a plurality of subscriber lines assigned a representative number, and a plurality of slave stations connected to the base station via a concentrator transmission line. A subscriber line concentrator communication system for performing an incoming call from the general subscriber telephone network to the slave station by a second dial method using a second dial number as a subscriber number of the slave station; In response to an incoming call from the general subscriber telephone network to the slave station that occurs while the concentrator transmission line is blocked, the calling subscriber of the general subscriber telephone network is notified of the blocking of the transmission line, and the calling subscriber is notified. On the other hand, a sending facilitating means for facilitating and executing the sending of the telephone number of the calling subscriber and the subscriber number of the called partner station, and sent from the calling subscriber based on the sending facilitating means. The calling subscriber's telephone number and call Storage means for storing the subscriber number of the remote station; accessing the storage means in response to the vacancy of the concentrator transmission line, and calling both the calling subscriber and the remote station; Connection means for connecting and connecting the subscriber line communication system. 2. A base station connected to a general subscriber's telephone network via a plurality of subscriber lines to which a representative number is assigned, and a plurality of slave stations connected to the base station via a concentrator transmission line. A subscriber line concentrator communication system for performing an incoming call from the general subscriber telephone network to the slave station by a second dial method using a second dial number as a subscriber number of the slave station; In response to an incoming call from the general subscriber telephone network to the slave station that occurs while the concentrator transmission line is blocked, the calling subscriber of the general subscriber telephone network is notified of the blocking of the transmission line and the telephone of the calling subscriber is blocked. Transmission facilitating means for facilitating and executing the transmission of a number; storage means for storing the telephone number of the calling subscriber sent from the calling subscriber based on the transmission facilitating means; Received a vacancy Connection means for accessing the storage means and calling the calling subscriber to send out the subscriber number of the called slave station, thereby calling the called slave station and connecting the two. A subscriber line communication system, comprising: 3. A base station connected to a general subscriber's telephone network via a plurality of subscriber lines assigned a representative number, and a plurality of slave stations connected to the base station via a concentrator transmission line. A subscriber line concentrator communication system for performing an incoming call from the general subscriber telephone network to the slave station by a second dial method using a second dial number as a subscriber number of the slave station; In response to an incoming call from the general subscriber telephone network to the slave station that occurred while the concentrator transmission line was blocked, the calling subscriber of the general subscriber telephone network was notified that the transmission path was blocked, and A subscriber number and a transmission facilitating means for facilitating and executing the transmission of a message to the called party's slave station; and a call destination party's slave station sent from the calling subscriber based on the sending facilitating means. Subscriber number and its calling phase Storage means for storing a message to the precedent station; accessing the storage means in response to the vacancy of the concentrator transmission line, calling the precedent station and calling a message from the calling subscriber Connection means for transmitting a signal to the subscriber line communication system.