JPH0535637B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an initial setting method for a telephone exchange;
In particular, it relates to an initial setting method for a telephone exchange, such as a hotel telephone exchange system, which receives information on whether or not a telephone terminal can be used from an external device of the telephone exchange, and performs a telephone terminal exchange service according to the instructions. .

[Background of the Invention] In a conventional telephone exchange that receives information on whether a telephone terminal can be used from an external device and performs a telephone terminal exchange service according to the instructions, it is difficult to determine whether a telephone terminal inside the telephone exchange can be used or not. If a failure occurs in which the air block control information, which is the information that instructs the air block control information, disappears, the telephone terminal that was usable before the failure occurs will become unusable until the correct air block control information is received again from the external device. There was a problem that made it possible.

[Object of the Invention] The object of the present invention is to improve the recovery operation of the telephone exchange even if a failure occurs in which the air blockage control information, which is information indicating whether or not the telephone terminal inside the telephone exchange is usable, has occurred. To provide an initial setting method for a telephone exchange, which suppresses the state in which a telephone terminal cannot be used during a period of time to a short period of time, and prevents telephone terminal users from being affected by a failure of the telephone exchange.

[Summary of the Invention] To this end, the present invention provides a telephone switching system that inputs blockage control information indicating whether or not a telephone terminal is usable from an external device of a telephone exchange, is stored in the storage device of the telephone exchange, and then, in a telephone exchange that performs a telephone terminal exchange service according to the blockage control information stored in the storage device, the blockage control information stored in the storage device is stored. When a failure that disappears occurs, the telephone exchange starts an initial setting operation for performing a failure recovery operation from an empty state indicating that the idle control information in the storage device can be used by the telephone terminal, Thereafter, the telephone exchange is initialized by inputting correct blockage control information again from the external device and storing it in the storage device to restore the original state.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6. FIG. 1 is a diagram showing a typical configuration of a telephone switching system implementing the present invention. In FIG. 1, CC is a central control unit of a telephone exchange, and carries out telephone exchange processing according to an exchange program stored in a storage device MM connected by an information signal bus BUS. That is,
The CC controls the exchange switch SW via the BUS according to the exchange program in the MM, and
Detects TEL outgoing requests and performs ringing and connection operations upon incoming calls. DC is a data communication device,
Connected to external device EU via communication line CL. The external device EU is in an empty state indicating whether it is possible to use the telephone terminal TEL housed in the telephone exchange (hereinafter referred to as the empty state) or in an impossible state (hereinafter referred to as the blocked state). A system for providing telephone exchange services only to telephone terminals TEL in which the telephone exchange is empty by transmitting the said idle control information to the telephone exchange by the means described in detail below. It is a control device, and is composed of, for example, a computer. In other words, EU connects CC and MM via CL-DC-BUS.
The CC is connected to and transmits and receives the air blockage control information, and the CC provides telephone exchange services based on this information. In the telephone exchange system shown in Figure 1, it is difficult to determine whether the telephone number is empty or blocked.
In accordance with EU instructions, telephone lines are closed during normal times. The air block control information sent from the EU is stored in the MM and held until new air block control information arrives, and the CC performs telephone exchange services in accordance with the held air block control information.

Figure 2 is a table BIR that displays idle control information indicating whether the TELs stored in the MM can be used (empty or blocked). state or
Or it displays whether it is in a blocked state. BIR has a value V for each telephone terminal TEL, and V indicates whether each TEL can be used (empty state or blocked state). In other words, if V is empty, TEL is usable, and if V is full, TEL is unusable.

In FIG. 1, if the contents of the table BIR disappear due to a failure in CC or MM, it is necessary to initialize the BIR shown in FIG. 2 at the time of failure recovery. However, as mentioned above, the TEL is normally blocked, and in order to empty the TEL according to instructions from the EU, the air block control information owned by the EU is sent via the CL-DC-BUS. The received data must be stored in the MM.

In conventional telephone exchanges, as shown in FIG. 3, the contents of the BIR are initially set in a blocked state during failure recovery processing. Figure 5 is a time chart showing the transition of the contents of the BIR in the conventional failure recovery process shown in Figure 3.The MM receives air blockage control information from the EU immediately before the failure occurs, causing the contents of the BIR to disappear. This figure shows the changes in the BIR contents, ie, BIR and V, until the BIR is accumulated and the correct contents are constructed, for a TEL that was in an empty state immediately before the failure occurred. As shown in Figure 5, in the conventional failure recovery process, the TEL, which was empty immediately before the failure, becomes blocked immediately before the failure occurs, and the period of time until the correct air blockage control information is sent from the EU. The time is
The content of BIR is blocked, indicating that TEL is unavailable.

On the other hand, as shown in FIG. 4, the present invention is characterized in that the contents of the BIR are initially set to be empty in the failure recovery process. For this reason, the TEL that was in an empty state immediately before the failure occurs, as shown in the time chart showing the transition of the contents of the BIR in the failure recovery process of the present invention shown in FIG.
Since the initial settings start from an empty state where TEL can be used, immediately before the failure occurs when the BIR contents disappear,
Until the MM receives and stores air block control information from the EU and composes a BIR with the correct content, it remains empty, indicating that the TEL is available.
That is, in FIG. 1, even if the contents of the table BIR disappear due to a failure in CC or MM, the failure will hardly affect the contents.

[Effects of the Invention] As is clear from the above embodiments, according to the present invention, even if a failure occurs in which the blockage control information of the telephone terminal disappears, the telephone terminal can be used during the failure recovery process. Since the initial settings are started from an empty state, the only effect on the telephone terminal user is recovery from failures of the telephone exchange, making it possible to realize an initial setting method for the telephone exchange that can significantly improve the telephone exchange system and its operating rate. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone exchange system to which the present invention is applied, FIG. 2 is a block diagram of a blockage control information table of a telephone terminal, and FIG. 3 is a flowchart showing the contents of conventional failure recovery processing. FIG. 4 is a flowchart showing the contents of the failure recovery process according to the present invention, FIG. 5 is a time chart showing the transition of the blockage control information of the conventional telephone terminal, and FIG. 6 is the blockage control information of the telephone terminal of the present invention. This is a time chart showing the transition of . MM...Storage device of the telephone exchange, CC...Central control unit of the telephone exchange, EU...External device that transmits blockage control information of telephone terminals to the telephone exchange,
TEL...Telephone terminal, BIR...Air block control information table for telephone terminal, V...BIR value for each telephone terminal.

Claims (1)

[Claims] 1. A telephone switching system in which blockage control information indicating whether or not a telephone terminal is available for use is input from an external device of a telephone exchange, and after the blockage control information is stored in a storage device of the telephone exchange. , in a telephone exchange that performs a telephone terminal exchange service according to the blockage control information stored in the storage device, when a failure occurs in which the blockage control information stored in the storage device disappears, the telephone exchange Initial setting operation for the exchange to perform failure recovery operation,
The idle control information in the storage device starts from an empty state indicating that the telephone terminal is usable, and then the correct idle control information is input again from the external device and stored in the storage device, and the original information is restored. By restoring the telephone terminal to the state, the telephone terminal user is allowed to use the telephone terminal even during the initial setting operation of the telephone exchange, and the idle control information stored in the storage device is erased. An initial setting method for a telephone exchange, which is characterized in that even if a failure occurs, the telephone terminal is kept unusable for a short period of time, and telephone terminal users are not affected by the failure of the telephone exchange.