JPH0482455A - Emergency compulsory connection/disconnection system - Google Patents

Abstract

PURPOSE:To prevent information delayed by disconnecting speech by retrieving a compulsorily disconnectable line when trunk line outgoing is emergency one, capturing a correspondent null central office trunk, and performing the trunk line outgoing. CONSTITUTION:When the trunk line outgoing is issued from an extension telephone set 5, a null central office trunk 1 is selected, and it is checked whether or not an outgoing destination dial number shows the emergency outgoing by emergency decision memory 31 when selection is impossible. When it is the emergency outgoing, speech class memory 32 is retrieved, and a compulsorily disconnectable trunk 1 is found out. When the compulsorily disconnectable trunk exists, a talkie trunk 4 is connected to the busy line of the trunk, and a talkie representing compulsory disconnection due to an emergency state is informed to the user of the line for constant time, and the line is disconnected. Then, trunk line outgoing connection processing is performed by capturing the null central office trunk 1. Thereby, it is possible to perform outgoing connection in the emergency state in all the busy states, and to prevent the behavior of information, etc., delayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an emergency forced disconnection connection system, and more particularly to a central line origination connection system in an emergency in a private branch exchange.

[Conventional technology]

Conventionally, in the central office line origination connection method when all central office line trunks are busy,
Since it was impossible to capture the central office trunk, the exchange used a connection method in which the calling party heard a busy tone.

[Problem to be solved by the invention]

In the above-described conventional central office line origination connection method when all central office line trunks are busy, it is impossible to make a central office line call, and the exchange issues a busy tone to the calling party. In such cases, even in the event of an emergency, the calling party has to recover, wait for the central office line trunk to become empty, and then try to make a call again, resulting in a delay in reporting, etc. be.

[Means to solve the problem]

The emergency forced disconnection connection method of the present invention is a central office line originating connection system of a private branch exchange, in which a central office line trunk connected to a central office line,
an extension telephone that makes a call to the central office line; an emergency determination storage means that stores a dial number for an emergency call; and a telephone call that stores call class information indicating whether or not to forcibly disconnect a line in progress corresponding to the central office line trunk. class storage means;
If a call is made to the office line from the extension telephone while the office line trunk is all busy and calls cannot be made to the office line, the emergency determination storage means is referenced to determine whether or not the call to the office line is due to an emergency. If it is an emergency, it searches for a line that can be forcibly disconnected by referring to the call class storage means, and if there is a line that can be forcibly disconnected, the call is disconnected and the corresponding vacant office line trunk is captured. It is configured to make central line calls.

Further, in the above configuration, a talkie device is provided, and the talkie device interrupts the forcibly disconnectable line;
It is also possible to have a configuration in which the call is disconnected after a talkie indicating that the call is to be forcibly disconnected.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention. The private branch exchange of this embodiment has a central office line trunk 1 connected to a central office line.
, a talkie trunk 4 for transmitting talkies, an extension telephone 5, a communication path switch 2 for accommodating and interconnecting the office line trunk 1, talkie trunk 4, and extension telephone 5, and controlling each of the above parts. and an exchange control section 3.

Furthermore, the exchange control unit 3 has an emergency determination memory 31 that stores the dial number for emergency call, and a call class memory 32 that stores the call class information of the call in progress for each central office line trunk 1. .

Next, the operation will be explained. FIG. 2 shows the processing flow of the present invention.

The emergency determination memory 31 of the exchange control unit 3 stores in advance dial numbers for emergency calls (for example, 110, 119).The call class memory 32 stores each of the central office line trunks 1 and calls. Each time a call is made, call class information indicating whether the call in progress can be forcibly disconnected is stored at the corresponding address.

When a central office line call is made from the extension telephone 5, a vacant central office line trunk 1 is selected (step 40).

As a result, if the vacant office line trunk 1 cannot be selected (all trunks are in use) (No in step 41), the emergency judgment memory 31 checks whether the destination dialed number is subject to an emergency call ( Step 42). If the call is due to an emergency (Yes in step 42), the call class memory 32 is searched and the central office line trunk 1 is forcibly disconnected.
step 43). If there is a central office line trunk 1 that can be forcibly disconnected (Yes in step 43), a talkie trunk 4 is connected to the corresponding line during a call, and a talkie message is sent to the line user informing that the line will be forcibly disconnected due to an emergency situation. A certain period of time is allowed (step 44). Then, the corresponding telephone line is disconnected (step 45), and the vacant office line trunk 1 is captured to perform the office line origination connection process (step 46).

If there is a vacant office line trunk 1 at the time of the call (step 41)
(Yes), normal outgoing connection processing is performed.

Further, if there is no vacant office line trunk 1 or office line trunk 1 that can be forcibly disconnected (No in step 42).

If No in step 43), a busy tone is connected to the extension telephone 5 that made the call (step 47).

〔Effect of the invention〕

As explained above, the present invention forcibly disconnects the busy line of a certain call class and captures the vacant office line trunk, thereby making it possible to connect outgoing calls in an emergency when all the central office line trunks are busy. This has the effect of preventing delays in actions such as reporting.

In addition, the users of the lines that will be forcibly disconnected will hear a talkie informing them that the line will be forcibly disconnected due to an emergency situation.
This will ensure the understanding and cooperation of the affected users, and will not be mistaken for a fault with the switchboard.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the processing flow of the present invention. 1... Office line trunk, 2... Call path switch, 3.
...Exchange control unit, 4...Talkie trunk, 5...
Extension phone.

Claims (1)

[Scope of Claims] 1. In a central office line origination connection system of a private branch exchange, a central office line trunk that connects to the central office line, an extension telephone that makes a call to the central office line, and an emergency judgment storage that stores a dial number to be used for emergency calls. and a call class storage means for storing call class information indicating whether or not to forcibly disconnect a line during a call corresponding to the central office line trunk, when the central office line trunk is in a state where it is impossible to make a call due to all the central office line trunks being busy. When a central line call is made from the extension telephone, the dial number is used to refer to the emergency determination storage means to determine whether or not the central line call is due to an emergency, and if it is an emergency, the call class storage means is stored. An emergency forced disconnection connection method characterized in that a line that can be forcibly disconnected is searched by reference, and if there is a line that can be forcibly disconnected, the call is disconnected, a corresponding vacant central office line trunk is captured, and a central line call is made. . 2. Claim 1, further comprising a talkie device, wherein the talkie device interrupts the line that can be forcibly disconnected, and after transmitting a talkie indicating that the call is to be forcibly disconnected, the call is disconnected. Emergency forced disconnection connection method.