JPH04371039A - Reconnection system for switched line - Google Patents

Abstract

PURPOSE:To reconnect a line by one call originating processing at the time of the occurrence of line trouble. CONSTITUTION:When a switched line connection request mechanism 2A in a system 1A reconnects a switched line disconnected by line trouble, this mechanism 2A transfers control 21 to a queue processing mechanism 3A. This mechanism 3A delays control transfer to a call originating processing mechanism 4A by a wait time acquired from a system 1B into a memory at the preceding time. The queue processing mechanism 3A transfers the control 21 to the call originating processing mechanism 4A after the wait time. The mechanism 4A performs call originating processing 12 for a switched line 10 to connect a call terminating processing mechanism 5B of the system 1B and the line 10. When line connection is completed, the call originating processing mechanism 4A transfers control 22 to a wait time acquiring mechanism 6A for the purpose of acquiring the wait time from the system 1B. The wait time acquiring mechanism 6A transfers request data 11A to a wait time reporting mechanism 7B of the system 1B to request report of the wait time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reconnection method for switched lines, and more particularly to a reconnection method when a line failure occurs in a switched line for data communication.

0002

2. Description of the Related Art When data communication is performed between two systems using a switched line, if a line failure occurs, the line is disconnected. At this time, if reconnection is to be performed, the system on the called side must have already detected a line failure and is in a state of waiting for an incoming call. At that time, with conventional technology, the called system cannot recognize the maximum time required to detect a line failure, so the calling system repeats the call processing until the line can be reconnected. was going on.

0003

[Problems to be Solved by the Invention] In the conventional system described above, since the calling system cannot recognize the maximum time required for the called system to detect a line failure, the calling system cannot process the call. The disadvantage is that the process must be repeated until the line can be connected.

0004

[Means for Solving the Problems] The switched line reconnection method of the present invention provides for a maximum time required for the called system to detect a line failure between two systems connected by a switched line. A meeting time notification mechanism is provided on the called side system to notify the side system as the meeting time,
The waiting time acquisition mechanism acquires from the called system as the waiting time the maximum time required for the called system to detect a line failure, and the waiting time acquired by this waiting time acquisition mechanism when reconnecting after a line failure occurs. A waiting processing mechanism for waiting for a certain amount of time is provided in the calling side system.

[0005]

Embodiments Next, embodiments of the present invention will be explained with reference to the drawings.

Referring to FIG. 1, in one embodiment of the present invention, a calling side system 1A includes a switched line connection request mechanism 2A, a call processing mechanism 4A, a waiting processing mechanism 3A, and a waiting time acquisition mechanism 6A. Constructed by adding. The system 1B on the called side is configured by adding a waiting time notification mechanism 7B to the incoming call processing mechanism 5B. System 1A and system 2B are connected via exchange line 10.

Next, the operation before a line failure occurs will be explained using FIG.

[0008] Switched line connection request mechanism 2A of system 1A
is the waiting processing mechanism 3A when connecting a switched line.
Control 21 is passed to. If the waiting processing mechanism 3A determines that a line failure has not yet occurred, it does nothing and passes control 21 to the call processing mechanism 4A. The call processing mechanism 4A is the switched line 1
0, and the line 10 is connected to the incoming call processing mechanism 5B of the system 1B. Once the line connection is complete,
In order to obtain the waiting time from the system 1B, the call processing mechanism 4A sends a control 22 to the waiting time acquisition mechanism 6A.
give. The meeting time acquisition mechanism 6A passes the request data 11A to the meeting time notification mechanism 7B of the system 1B so as to notify the meeting time. The waiting time notification mechanism 7B notifies the waiting time acquisition mechanism 6A of the system 1A of the maximum time required to detect a line failure, which is set in the memory (not shown) of the system 1B at the time of system generation, as waiting time data 11B. do. When the meeting time acquisition mechanism 6A is notified of the meeting time from the meeting time notification mechanism 7B, the meeting time acquisition mechanism 6A stores the time in the memory (not shown) of the system 1A, and then
Notification 23 is made to the switched line connection request mechanism 2A that the switched line connection process has been completed.

Next, the operation immediately after a line failure occurs will be explained.

[0010] The switched line connection requesting mechanism 2A in the system 1A passes control 21 to the waiting processing mechanism 3A when reconnecting a switched line that has been disconnected due to a line failure. When the waiting processing mechanism 3A determines that a line failure has just occurred, it waits to transfer control to the call processing mechanism 4A for the waiting time acquired in the memory from the previous system 1B. Meeting processing mechanism 3 after meeting
A passes control 21 to the call processing mechanism 4A. The subsequent processing is the same as the operation before the line failure occurred.

[0011]

[Effects of the Invention] As explained above, the present invention enables reconnection in one call processing by obtaining the maximum time required for failure detection in the called system on the calling side. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

1A, 1B System 2A Switched line connection request mechanism 3A Waiting processing mechanism 4A Call processing mechanism 5B Incoming call processing mechanism 6A Meeting time acquisition mechanism 7B Meeting time notification mechanism 10 Exchange circuit 11A, 11B Data flow 12 Call processing 21, 22, 23 Control flow

Claims (1)

[Claims] Claim 1: In a switched line reconnection method that reconnects two systems connected by a switched line when a line failure occurs, the waiting time is the maximum time required for the called system to detect a line failure. A waiting time notification mechanism is provided in the called side system to notify the calling side system as a waiting time, and a waiting time acquisition mechanism that acquires the waiting time from the called side system and acquiring the waiting time when reconnecting after a line failure occurs A switching line reconnection method characterized in that the calling side system is provided with a waiting processing mechanism that waits for calling processing for the waiting time acquired by the mechanism.