JPH01258538A - Restarting system - Google Patents

Abstract

PURPOSE:To prevent a collective calling after restarting by storing an initial setting condition in a TC(control circuit), when an initial setting order is received from a CP(central control part), making TC into a switching supervising mode, and when the cutting detection is executed, absorbing the first cutting detection in the TC and preventing the informing to the CP. CONSTITUTION:At the time of receiving an initial setting order from a CP4, when a terminal device 2 is already restored, cutting is immediately detected, thereafter, the calling supervision of the terminal device 2 is executed by a TC5 and an ordinary operation mode is shifted. At the time of receiving the initial setting order, when the terminal device 2 is not restored, the TC5 continues a cutting supervising mode and supervises the cutting of the terminal device 2. Thereafter, when the terminal device 2 is restored, the TC5 detects the cutting and immediately, executes the calling supervision. After that, the ordinary operation mode is shifted, and when the calling request from the terminal device 2 is executed, the TC5 detects it, transmits the calling request event to the CP4 and an ordinary call connecting processing is executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for restarting an exchange system when a failure or the like occurs. If there are calls that have been restored, the control circuit (hereinafter referred to as TC) considers them to be calls, and each TC simultaneously calls the central control unit (hereinafter referred to as c).
Since this would cause a sudden increase in the load on the CP, H&D control is performed to prevent this. In this method, H&D is periodically suspended to monitor disconnection of terminal devices, and control is performed to sequentially incorporate the disconnected terminals into the operational mode.

In addition, as related to the prior art, for example, "Dl.

Part 9 of “Automatic Switchboard” “Exchange Program (Part 1)”
page 555 and page 14 of “Exchange Program (Part 2)”
There are 7.

[Problem to be solved by the invention]

The above-mentioned restart method according to the prior art performs H&D control to prevent simultaneous calls after initialization and prevents a sudden load from being applied to the CP, but there is a problem in that the H&D control is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a restart method that prevents simultaneous calling after restart with simple control.

[Means to solve the problem]

The above purpose is to store the initial setting state in the TC, so that when the initial setting order is received from the CP, the TC enters the disconnection monitoring mode (talking state), and when disconnection is detected, the first disconnection is detected within the TC. This is achieved by absorbing the information and not notifying the CP.

[Effect]

The TO continues to monitor disconnection if the terminal device has not recovered, and when the first recovery of the terminal device is detected, the disconnection detection is absorbed within the TC.Next, the TC shifts to call monitoring mode. Monitor call requests from terminal devices. By doing this, even if a large number of terminal devices are in an unrecovered state at the start of the restart operation and after initial settings, these will not be considered as a simultaneous call, and those that have recovered will be sequentially detected. and can incorporate them into the operational mode.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 shows an outline of the configuration of the switching system, in which 1 is a terminal interface circuit section, 2 is a terminal device, 3 is a communication path section, and 4 is a central processing section (CP).

The terminal interface circuit section 1 has a control circuit (TC) 5 composed of a processor and a memory individually or in common for multiple circuits for the terminal device 2, and a central control section (CP).
) 4 to execute call connection processing operations within the switching system. FIG. 2 is an operation flowchart at the time of initial setting of the TC. When the CP4 sends the initial setting order to %TC5 at the start of the restart operation, the %'I'C5 stores this in the initial setting state memory.Then, the terminal device 2 enters the call state, that is, the disconnection monitoring mode. When disconnection information coming up from is detected, it is determined whether it is the first disconnection information after restarting by the initial setting state judgment, and if it is not the first, a disconnection detection event is sent to CP4, and if it is the first, Shift to call monitoring mode and release the initial setting state memory without notifying the CP4 of this ◇Tsumashi,
The logic is configured so that the first disconnection information after restart is absorbed within the TC5 and not transmitted to the CP4.

FIG. 5 shows an operation sequence performed according to this operation flowchart. Tsuma D, if the terminal device has already recovered when receiving the initial setting order from CP4, TC
Detect the disconnection immediately as shown in ■, and then 'I'C5
monitors the call origination of the terminal device 2 and shifts to the normal operation mode. Further, as shown in the state TO■ in FIG. 2, if the terminal device 2 has not recovered when the initial setting order is received, the TC 5 continues the disconnection monitoring mode and monitors the disconnection of the terminal device 2. After that, if the terminal device 2 is restored, the 'I'C
5 detects the disconnection and immediately monitors the call.

After that, the mode shifts to the normal operation mode, and if there is a call request from the terminal device 2, the 'I'C5 detects it and the CP
4, and normal call connection processing is executed.

As shown in FIG. 4, if there is an incoming call to the corresponding terminal device while the TC5 is in disconnection monitoring mode, the CP
4, issues a response monitoring instruction to 9'l'C5, and if the terminal device 2 has not recovered yet, 'I'C5 immediately detects a response and sends a response detection event to CP4. After that, the phone will not be in a call state and will switch to normal operation mode.

[Effects of the Invention] As explained above, according to the present invention, by storing the initial setting state in the TC, the TO can set the initial setting order to the monitoring mode when it receives the initial setting order from the CP, and Since the disconnection is absorbed within the TC and not notified to the CP, even if there are a large number of unrecovered terminal devices during the restart operation, they are not treated as a simultaneous call and are controlled, and the conventional method Compared to the H&D control used to prevent this, the same effect can be achieved with a very simple control method.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an exchange system according to an embodiment of the present invention,
Figure 2 is an operation flowchart at the time of initial setting of TC;
4 is a chart of an operation sequence 70 between TC and CP. DESCRIPTION OF SYMBOLS 1... Terminal interface circuit section, 2... Terminal device, 3... Call path section, 4... Central control section (CP), 5
...Control circuit (TC). 1st ¥1 3rd mouth

Claims (1)

[Claims] 1. The terminal interface circuit section has a control circuit composed of a processor and a memory either individually or in common for multiple circuits, and detects the state of the terminal or a change in the state based on instructions from the central control section. In the exchange system, if a failure etc. occurs during operation and the exchange system is initialized and restarted, the initial settings are specified from the central control unit.
Once the control circuit side is in the call state and the disconnection monitoring mode is set, the circuit that has detected the disconnection or disconnection state is transferred to the call monitoring mode, and the first disconnection information after initial setting is absorbed within the control circuit and transferred from the control circuit. A restart method characterized by not notifying the central control unit. 2. If the central control unit issues a response monitoring designation due to an incoming call, etc. before the control circuit side detects a disconnection or disconnection state, the control circuit shifts from the disconnection monitoring mode to the call monitoring mode. The restart method according to claim 1.