JPH05268386A - Optical subscriber transmission system - Google Patents

Abstract

PURPOSE:To always take emergency contact on the occurrence of emergency by supplying an emergency power supply from a node system side even when a power supply device of an optical subscriber terminal equipment is faulty. CONSTITUTION:When an optical subscriber terminal power supply device 1-12 is faulty or a commercial power supply 1-13 is faulty, a power supply of an optical subscriber terminal interface 1-7 and optical subscriber terminals 1-8-1-10 is interrupted and an optical subscriber 1-1 cannot receive a signal in the normal state. In this case, the optical subscriber circuit 1-1 sends an optical subscriber power supply alarm information signal 1-6 to an emergency power supply device 1-2, which generates an emergency power supply. The emergency power supply is supplied to an emergency power supply distributer 1-14 of an optical subscriber through a metallic part 1-4 made of a conductive material of a metallized optical fiber cable 1-3 and distributed to each emergency talking terminal equipment 1-11 and the optical subscriber terminal interface 1-7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical subscriber transmission system, and more particularly to an emergency call system when an optical subscriber power supply unit or commercial power supply is abnormal.

[0002]

2. Description of the Related Art A conventional optical subscriber transmission system is, as shown in FIG. 2, an optical subscriber circuit 2-1 and an optical fiber cable 2.
-2, an optical subscriber terminal interface 2-3, optical subscriber terminals 2-4 to 2-7, an optical subscriber terminal power supply device 2-8 and a commercial power supply 2-9.

A telephone call or data transmission of an optical subscriber is converted into an optical signal by the optical subscriber terminals 2-4 to 2-7 or the optical subscriber terminal interface 2-3, and is transmitted through the optical fiber cable 2-2 to the node system. Side optical subscriber circuit 2-
1 is transmitted.

[0004]

In this system, when the optical subscriber terminal power supply device 2-8 fails or the commercial power source 2-9 is abnormal, the optical subscriber terminals 2-4 to 2-7 and the optical subscriber are provided. The power supply to the terminal interface 2-3 is cut off, and the telephone call and data of the optical subscriber cannot be transmitted.

Further, even if the optical subscriber terminal power supply device 2-8 is equipped with an emergency storage battery, long-time transmission is impossible.

An object of the present invention is to provide an optical subscriber transmission system which enables emergency contact to be made when an optical subscriber has an emergency.

[0007]

In order to achieve the above object, an optical subscriber transmission system according to the present invention uses an optical subscriber circuit having an optical subscriber power source failure detection function and a power source failure information signal as an input. Having an emergency power supply device for generating an emergency power supply to the optical subscriber side, a cable for transmitting the emergency power supply to the optical subscriber side, and an emergency power supply distribution device for distributing the supplied emergency power to the emergency call terminal Is.

The cable has a structure in which a metallic portion for supplying an emergency power supply is covered with an optical fiber portion for data transmission.

[0009]

When the power failure of the optical subscriber terminal is detected, the emergency power supply is distributed to the optical subscriber terminal interface and the emergency call terminal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, the optical subscriber transmission system according to this embodiment uses an optical subscriber circuit 1-1 having an optical subscriber power source failure detection function and a power source failure information signal as an input, and the optical subscriber side. An emergency power supply device 1-2 for generating an emergency power source,
Optical fiber cable for transmitting emergency power to the optical subscriber side 1
-3 and an emergency power supply distribution device 1-14 for distributing the supplied emergency power to the emergency call terminal 1-11. 1-7 is an optical subscriber terminal interface, 1-8-
1-10 is an optical subscriber terminal, 1-13 is a commercial power source, 1-1
2 is an optical subscriber terminal power supply device.

Further, the cable 1-3 has a structure in which a metallic part 1-4 for supplying an emergency power source is covered with an optical fiber part 1-5 for data transmission.

In the normal state, the optical subscriber terminals 1-8 to 1-
10 or the optical subscriber circuit 1 through the optical fiber section 1-5 of the optical fiber cable 1-3 in which the signal in the normal state is metalized from the optical subscriber terminal interface 1-7.
Received at -1.

When the optical subscriber terminal power supply device 1-12 fails or the commercial power source 1-13 is abnormal, the optical subscriber terminal interface 1-7 and the optical subscriber terminals 1-8 to 1-10 are turned off. The optical subscriber circuit 1-1 cannot receive a signal in a normal state.

When the optical subscriber circuit 1-1 sends the optical subscriber power supply alarm information signal 1-6 to the emergency power supply device 1-2, the emergency power supply device 1-2 generates an emergency power supply.

The emergency power is supplied to the emergency power supply distribution device 1-14 of the optical subscriber through the metallic portion 1-4 of the conductive material of the metallized optical fiber cable 1-3, and each emergency call terminal 1-11 and the optical subscriber. It distributes to the person terminal interface 1-7.

Emergency call terminal 1-1 to which emergency power is supplied
1 or a signal indicating that the emergency power is being supplied from the optical subscriber terminal interface 1-7, the optical subscriber circuit 1-
Sent to 1.

When the optical subscriber terminal power supply device 1-12 and the commercial power supply 1-13 are restored to normal, the power supply switching signal 1-1 from the optical subscriber terminal power supply device 1-12 is sent.
At 5, the power supply is changed from the emergency power supply distribution device 1-14 to the optical subscriber terminal power supply device 1-12, and a signal in a normal state is sent to the optical subscriber circuit 1-1 and is in a normal state. Upon receiving the signal, the optical subscriber circuit 1-1 sends out the optical subscriber power supply alarm information signal 1-6 for stopping the emergency power supply.

[0019]

As described above, according to the present invention, even if the power supply device of the optical subscriber terminal becomes abnormal, the emergency power can be supplied from the node system side, and the emergency situation of the optical subscriber occurs. , Having the effect of being able to always make emergency contact.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing a conventional example.

[Explanation of symbols]

1-1 Optical subscriber circuit 1-2 Emergency power supply device 1-3 Metallized optical fiber cable 1-4 Metallic part of metallized optical fiber cable 1-5 Optical fiber part of metallized optical fiber cable 1-6 Optical subscriber power supply alarm information signal 1- 7 Optical subscriber terminal interface 1-8 to 1-10 Optical subscriber terminal 1-11 Emergency call terminal 1-12 Optical subscriber terminal power supply device 1-13 Commercial power supply 1-14 Emergency power supply distribution device 1-15 Power supply Supply switching signal

Claims (2)

[Claims] 1. An optical subscriber circuit having an optical subscriber power supply failure detection function, an emergency power supply device for generating an emergency power supply to an optical subscriber side by inputting a power supply failure information signal, and an optical power supply for the emergency power supply. An optical subscriber transmission system characterized by having a cable for transmitting to the person side and an emergency power supply distribution device for distributing the supplied emergency power to emergency call terminals. 2. The optical subscriber transmission system according to claim 1, wherein the cable has a structure in which a metallic part for supplying an emergency power source is covered with an optical fiber part for data transmission.