JPS58182985A - Releasing system of self-control function of remote station - Google Patents

Abstract

PURPOSE:To prevent the shift in recognition between a master station and remote stations and to ensure the release of self-control function, by providing a means actuating the intra-office connecting function through the intermission of the transmission of control information, and informing that the intra-office connection is being functioned to the master station when the transmission of the control information is restored. CONSTITUTION:A remote station 1 and a master station 2 are connected with a digital communication line 4, and telephone sets 3-1-3-n are connected to a line concentration stage 1-1 of the remote station 1. A self-control section 1-3 is connected to the line concentration stage 1-1 via a line concentration stage control section 1-2 to control the control section 1-2 and an intra-office connection network 1-4 with the control section 1-3. The control section 1-2 switches the connection between the line concentration stage 1-1 and a transmission terminal device 1-6 with a switching circuit 1-5. If the control information from the master station 1 is intermitted, the control section 1-2 in the station itself is started, and when the transmission of the control information is restored, the functioning of the intra-office connection is informed to the master station 2 from the network 1-4 to prevent the shift in recognition between the master station 2 and the remote station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote station autonomous function release method, particularly to a remote station autonomous function release method in an electronic exchange. This relates to a method for canceling the start-up state.

At the remote station, which accommodates 770 people in remote areas under the control of the master station, concentrating their lines and relaying them to the master station, in the event of an accident, all the communication lines connected to the master station are damaged, making it impossible to control the master station. When it becomes
Conventionally, when the function has the function of autonomously connecting within the own station, activation is performed by setting a timer when transmitting information in the transmission control procedure that exchanges control information with the master station through an alarm for all lines or a communication line. This is done by using a timeout when a confirmation signal is not returned. On the other hand, the master station similarly learns that the remote station has activated its autonomous function due to all line alarms and transmission control procedure timeouts, and upon recovery, it instructs the remote station to cancel its autonomous function and returns to master station control. However, in the conventional method, only one side enters the above state due to a temporary failure or disturbance in the communication line, and especially when only the remote station enters the autonomous function activation state, the master station cannot issue an autonomous function cancellation instruction. The drawback was that even if the communication line was restored, the master station could not be controlled.

The present invention eliminates the above-mentioned drawbacks of the conventional ones, and provides means for notifying the master station that the remote station is in the autonomous function activation state when the remote station is in the autonomous function activation state and can be controlled by the master station. This prevents a situation where call processing cannot be performed under the control of the master station when there is a discrepancy in the recognition of the autonomous function activation state between the remote station and the master station.

According to the present invention, a remote station has the function of concentrating and relaying a group of remote subscribers under the control of a master station, and autonomously establishing connections within itself when control of the master station is interrupted.

Due to the interruption of control information transmission, the local station connection function is activated,
A remote station autonomous function cancellation method is obtained which is characterized in that it has means for notifying the master station that the local station connection function is in progress when control information transmission is restored.

Next, a ninth embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which 1 is a remote station, 1-1 is a concentrator stage that concentrates lines, performs analog-to-digital conversion and multiplexing, and 1-2 is a concentrator stage and a master station. or a concentration stage control unit that controls switching to the local network; 1-
3 is an autonomous control unit that controls connections within the own station; 1-4 is a network for connections within the own station; 1-5 is a switching circuit that switches and connects the communication path to the master station or the own network; 1-6 is a communication line A transmission terminal device that detects alarms and inserts and removes control information, 2 is a master station, 2-1 is a network 3-1 to 3-n are telephones, and 4 is a Digimel communication line that transmits calls and a control unit @. show.

Next, the operation shown in FIG. 1 will be described. Normally, switching circuit 1-
5 connects the master station network, and the line concentration stage control section 1-2 operates under control from the master station.

When the telephone 3-1 makes a call, the concentrator controller 1-2 transmits the call information to the remote station side transmission terminal bag fil-6, fil-2-2, and the central processor 2-2 controls the digital communication line 4. It controls the master station network 2-1 to select one of the empty channels and send a dial tone to the calling subscriber, and also sends the control information of the concentrator stage as well as the dial pulse reception request in the reverse direction of the above-mentioned route. Control is performed by transmitting the information to the concentrator controller 1-2. A transmission control procedure such as a high-level data link procedure is used to transmit these control information.

If confirmation of the transmitted information is not returned from the other party within a certain period of time, a timeout will occur and the data link will be considered disconnected, and the transmission terminal equipment will also generate an alarm due to a disconnection of the communication line, etc. Concentration stage control section 1
-2 switches the communication path to the local internal connection network 1-4 by the switching circuit 1-5, and also notifies the autonomous function activation to the autonomous control section 1-3. Thereafter, the call processing is performed by the autonomous control section 1-3 using the local connection network 1-4, and the concentrator stage control section 1-2 performs call processing only based on the control information from the autonomous control section 1-3. Let's do it.

Similarly, on the parent station side, the parent station remote station control section 2-4 monitors whether the parent station side control is disabled.

When the disabled state is restored, the master station side notifies the central processing unit 2-2 and urges the central processing unit 2-2 to exit the autonomous function release request.

On the other hand, the transmission of control information with the central station controller 1-2 Fi has been restored, and the autonomous control unit 1-3 under the control of il+ is activated by a means for notifying that the internal connection function is in progress. Periodically, the information that the intra-station connection function is in progress continues to be sent through the remote station control unit 2-4 on the master station side until a uniform function release command arrives from the master station, and when the autonomous agility release command arrives, the switching circuit 1
-5, and notifies the autonomous control unit 1-3 that the autonomous function has stopped, thereby restoring the normal state.

As explained above, when the remote station is in the autonomous function activated state and can be controlled by the master station, the present invention notifies the master station that the remote station is in the autonomous function activated state, that is, the local station connection function is in progress. Providing the means has the effect of preventing a situation in which call processing cannot be performed under the control of the master station when there is a discrepancy in the recognition of the autonomous function activation state between the remote station and the master station.

[Brief explanation of drawings]

FIG. 1 shows a block diagram of one embodiment of the invention.

Claims (1)

[Claims] In a remote station that has the function of concentrating and relaying a group of remote subscribers under the control of a master station and autonomously performing an intra-station connection when control of the master station is interrupted, the intra-station connection function is activated due to a disruption of control information transmission. , a remote station autonomous function release method characterized by having a means for notifying the master station that the local station connection function is in progress when the transmission of control information is subsequently restored.