JPH02137452A - Pseudo start-up signal sending device to private branch exchange - Google Patents

Abstract

PURPOSE:To perform bypass outgoing connection by evading the route of carrier terminal equipment or a private line in which a fault occurs and by using another normal route when an alarm display signal is detected by sending the ground to the opposite station signal reception circuit of a device for SR system interface in a private branch exchange. CONSTITUTION:When the fault occurs in the carrier terminal equipment or the private line, the alarm display lamp of the carrier terminal equipment is lit. A phototransistor(PHT) 4 equipped in an alarm detector(ADT) 3 detects the light of the lamp, and outputs an electrical signal to an SR line control circuit(SCC) 2 as a fault information signal. The SCC 2, when receiving the electrical signal, drives the contact 5 of a relay 6, and sends the ground to a connection terminal 8. In other words, the ground that is a false start-up signal is sent to the SN line of the OD trunk of the private branch exchange, thereby, the fact that the fault occurs in the carrier terminal equipment or the private line is informed to the private branch exchange.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention connects a private branch exchange and a carrier terminal device to an SR system (hereinafter referred to as SR When a fault occurs in the carrier terminal equipment or the dedicated line, a pseudo activation signal is sent to the private branch exchange to notify the private branch exchange of the occurrence of the fault. This invention relates to a pseudo activation signal sending device.

[Conventional technology]

Conventionally, in a private circuit switching network configured using a private branch exchange and a dedicated line by connecting a private branch exchange and a carrier terminal device using the SR method, if a failure occurs in the private branch exchange or the private line, a function to send a pseudo activation signal is provided. A pseudo activation signal was sent only from the special transport terminal equipment provided, and the private branch exchange was notified of the occurrence of a failure.

[Problem to be solved by the invention]

Therefore, if the carrier terminal device to be used does not have a function of sending out a pseudo activation signal, even if a failure occurs in the carrier terminal device or the leased line, the private branch exchange will not be notified of the failure. Therefore, when a telephone connected to a private branch exchange makes a call to the other party via a faulty carrier terminal device or dedicated line, the private branch exchange does not make a detour call to another protection line. An outgoing call is made to the carrier terminal device or dedicated line where the error occurred. As a result, the outgoing call is treated as an abnormal connection by the private branch exchange, and a restriction tone is sent to the telephone.

The purpose of the present invention is to eliminate such drawbacks and to provide a system for sending a pseudo activation signal to the private branch exchange to notify the private branch exchange when a failure occurs in the carrier terminal equipment or dedicated line. An object of the present invention is to provide a pseudo activation signal sending device.

[Means to solve the problem]

The device for sending a pseudo activation signal to a private branch exchange according to the present invention connects a local exchange and a carrier terminal device by an SR method having a 4-wire communication line and a 2-wire signal line of an individual line signal system, and uses a dedicated line. a signal detection means installed in a private line switched network configured with a private line switching network and configured to detect an alarm display signal of the transport terminal device; and when the signal detection means detects the alarm display signal,
The present invention is characterized in that it includes activation signal sending means for sending earth air as a activation signal to the game signal receiving circuit of the SR system interface device of the private branch exchange.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of a device for sending a pseudo activation signal to a private branch exchange according to the present invention.

This pseudo activation signal sending device 1 is equipped with an alarm detector (hereinafter referred to as A, DT) 3 and an ADT 3 for detecting the light of an alarm indicator light, which is an example of an alarm indicator signal output of a conveyance terminal device, and is installed in an ADT 3. A phototransistor (hereinafter referred to as PHT) 4 that detects light at the SR line control circuit (hereinafter referred to as SCC) 2, which controls the SR line (hereinafter referred to as SCC), is actually connected to the 0DI-rank SR line of the private branch exchange under the control of 5CC2, and provides ground air to the SR line. Sending SR line control contact 5
(ao to a15) and relay 6 that drives contact 5
(A0 to As5) and the game signal transmission circuit of the OD interface device of the carrier terminal device (hereinafter referred to as SS line)
and connection terminals 8 (T0 to TI,) which are directly connected to the 0DI-rank SR line of the private branch exchange.

Next, the operation will be explained. If there is no fault in the carrier terminal equipment or dedicated line, contact 5 connects connection terminals 7 and 8, and connects the SR of the OD trunk of the private branch exchange.
The line is connected to the SS line of the OD interface device of the transport terminal device. If a failure occurs in the transport terminal device or the dedicated line, an alarm indicator light on the transport terminal device lights up. PHT4 installed in ADT3 detects the light and sends 5CC electrical signals as a fault notification signal.
Output to 2. When the 5CC2 receives this electrical signal, the relay 6 drives the contact 5 and causes the connection terminal 8 to send earth air. That is, a pseudo activation signal is sent to the SR line of the OD trunk of the private branch exchange, and the private branch exchange is notified that a failure has occurred in the carrier terminal device or dedicated line.

〔Effect of the invention〕

As explained above, the pseudo activation signal sending device to the private branch exchange iA machine of the present invention connects the private branch exchange and the carrier terminal device to the SR having a 4vA communication line and a 2-wire signal line of the individual line signaling system.
signal detection means for detecting an alarm display signal from a transport terminal device, which is connected to a private circuit switching network using a leased line, and when this signal detection means detects an alarm display signal, a private branch exchange The game signal receiving circuit of the SR system interface device is provided with a moving signal transmitting means for transmitting earth air as a starting signal.

Therefore, by using the pseudo activation signal sending device to the private branch exchange of the present invention, if a failure occurs in the carrier terminal device or the dedicated line, a pseudo activation signal is sent to the private branch exchange and the fact is notified. . As a result, even if the carrier terminal equipment does not have a special function to notify the private branch exchange of the occurrence of a failure, the private branch exchange will be notified of the occurrence of a failure, so that the private branch exchange will be able to handle the situation when there is a call from a telephone, for example. , it is possible to avoid the route of the transport terminal device or dedicated line where the failure has occurred and to perform a detour outgoing connection using another normal route.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a device for sending a pseudo activation signal to a private branch exchange according to the present invention. 1...Pseudo activation signal sending device to private branch exchange 2...
SR line control circuit (S CC) 3... Alarm detector (ADT) 4... Phototransistor (PHT) 5 ・SR line control contact (81
1-a l5) 6... Relay (AO-A1.) 7... Connection terminal (R, ~RIS) 8... Connection terminal (T0-T1.)

Claims (1)

[Claims] (1) The private branch exchange and the carrier terminal equipment are connected by the SR system, which has a 4-wire communication line and a 2-wire signal line using individual line signaling, and is installed in a private circuit switching network configured using dedicated lines, signal detection means for detecting an alarm display signal of the transport terminal device; when the signal detection means detects the alarm display signal;
A device for transmitting a pseudo activation signal to a private branch exchange, comprising activation signal sending means for transmitting ground air as a activation signal to a game signal receiving circuit of an SR system interface device of the private branch exchange.