JPH1013355A - Optical transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power shared by a subscriber by stopping the power supply to the optical transmitter installed at the subscriber side when an optical input is not interrupted or no connection request comes from a subscriber. SOLUTION: An optical input monitor circuit 7 of an optical transmitter 4 installed at a subscriber side senses an input and interrupt of an optical signal from an optical transmitter 2 at an exchange side to stop power supply to a subscriber device 5 and the optical transmitter 4 when the optical input is interrupted. Furthermore, a subscriber connection monitor 8 of the subscriber device 5 installed at the subscriber side senses a subscriber terminal current with a subscriber terminal equipment 6 to start the subscriber terminal 6 to allow the subscriber to make a connection request and when the subscriber terminal current is increased, it is sensed as a connection request from the subscriber terminal equipment 6 and when no connection request comes, the power supply is stopped to the subscriber device 5 and the optical transmitter 4. Moreover, an exchange side optical transmitter 2 does not output an optical signal to the optical transmitter 4 when no electric signal is received from an exchange 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmission apparatus in which optical transmission apparatuses are installed on a subscriber side and an exchange side, respectively, and optical transmission is performed using an optical fiber therebetween.

[0002]

2. Description of the Related Art A conventional apparatus is disclosed in JP-A-63-94797.
As described in the publication, a subscriber unit and an optical transmission device are installed on the subscriber side in order to accommodate a plurality of remote subscribers, and an optical transmission device is also installed on the exchange, and an optical fiber is provided therebetween. By connecting at a remote subscriber is economically accommodated.

[0003] These optical transmission devices are DC 5V or-
Since it operates at 48 V, the optical transmission device installed on the subscriber side obtains power required for operation by performing AC / DC conversion from a commercial power supply. In addition, the optical transmission device on the subscriber side is always operating and consumes power even when the subscriber and the exchange are not connected (standby state).

[0004]

As described above, the optical transmission device installed on the subscriber side always consumes power.
Since this power uses the commercial power of the subscriber, there is a disadvantage that the burden of power supply is imposed on the subscriber.

An object of the present invention is to provide an economical optical transmission device by minimizing the electric power borne by a subscriber.

[0006]

In order to achieve the above object, the present invention detects an optical input, detects an optical input activation monitoring circuit for activating the subscriber unit, and detects a connection request from the subscriber. When there is no optical input or connection request from the subscriber by the subscriber connection monitoring circuit that activates the subscriber device, the function of the subscriber device is stopped, and an optical input or a connection request from the subscriber is generated. Only when this is done, the subscriber unit is started.

The optical input monitoring circuit senses the optical input and supplies power to the subscriber unit and the optical transmission device on the subscriber side, and also detects the interruption of the optical input and stops the power supply.

The subscriber connection monitoring circuit senses a connection request from the subscriber and supplies power to the subscriber device and the optical transmission device on the subscriber side. Stop.

Thus, when there is no interruption of the optical input or a connection request from the subscriber, the power supply is stopped to reduce the power borne by the subscriber.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIGS.

FIG. 1 is a block diagram showing an apparatus mechanism according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an optical transmission signal from an exchange side optical transmission apparatus 2 according to an embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of an apparatus for starting
FIG. 4 is a block diagram showing a device configuration for monitoring a connection request from the subscriber terminal 6 and activating the subscriber device in one embodiment of the present invention.

In FIG. 1, a signal from an exchange 1 is converted into an optical signal by an optical transmission device 2 installed on the exchange side, and input to an optical transmission device 4 installed on the subscriber side via an optical fiber 3. You.

The optical transmission device 4 converts the input optical signal into an electric signal and inputs the electric signal to the subscriber device 5. The subscriber device 5 controls the subscriber terminal 6 according to the input electric signal.

The subscriber unit 5 inputs an electric signal to the optical transmission device 4 in response to a connection request from the subscriber terminal 6, and the optical transmission device 4 converts the input electric signal into an optical signal, and 3 to the optical transmission device 2. The optical transmission device 2 converts an optical signal from the optical transmission device 4 into an electric signal and inputs the electric signal to the exchange 1.

The optical transmission device 4 installed on the subscriber side
Has an optical input monitoring circuit 7 that senses an optical input and supplies power to the subscriber unit 5 and the optical transmission device 4. The optical input monitoring circuit 7 senses the input and disconnection of the optical signal from the optical transmission device 2 on the exchange side, and when the optical input is disconnected, supplies power to the subscriber unit 5 and the optical transmission device 4. Also has the function of stopping.

Further, the subscriber unit 5 installed on the subscriber side senses a connection request from the subscriber terminal 6 and supplies a power to the subscriber unit 5 and the optical transmission unit 4 for a subscriber connection monitoring circuit 8. have. The subscriber connection monitoring circuit 8 senses the subscriber terminal current with the subscriber terminal 6, activates the subscriber terminal 6 to request a connection from the subscriber terminal, and when the subscriber terminal current increases, the subscriber terminal monitoring circuit 8 detects this. It also has a function of detecting a connection request from the subscriber terminal 6 and stopping power supply to the subscriber device 5 and the optical transmission device 4 when there is no connection request.

On the other hand, the optical transmission device 2 on the exchange side outputs an optical signal to the optical transmission device 4 on the subscriber side only when an electric signal is input from the exchange 1, and the input of the electric signal from the exchange 1 When there is no optical signal, no optical signal is output to the optical transmission device 4.

A more specific operation will be described with reference to FIGS.

In FIG. 2, a signal from the exchange 1 is converted into an optical signal by an electric / optical conversion circuit 9 in the optical transmission device 2 installed on the exchange side by the optical transmission device 2 installed on the exchange side, and the optical signal is transmitted through the optical fiber 3. Optical transmission device 4 installed on the subscriber side
And input to the optical output starting circuit 10 in the switching-side optical transmission device 2. The optical output activation circuit detects the presence or absence of a signal from the exchange 1 and outputs an optical output stop signal to the electric / optical conversion circuit 9 when there is no signal from the exchange 1. Upon receiving the optical output stop signal from the optical output starting circuit, the electric / optical conversion circuit 9 stops the optical signal to the optical transmission device 4 on the subscriber side.

The optical signal from the exchange side optical transmission device 2 is converted into an electric signal by an electric / optical conversion device 11 in the subscriber side optical transmission device 4, and then converted into an electric signal in the subscriber side optical transmission device 4. The signal is input to the subscriber unit 5 via the signal processing circuit 12 and is also input to the optical input monitoring circuit 7 in the subscriber side optical transmission device 4. The optical input monitoring circuit 7 monitors the presence or absence of an electric signal from the electric / optical conversion circuit 11, and when there is no electric signal from the electric / optical conversion circuit 11, the electric power in the subscriber side optical transmission device 4 An output power stop signal is output to conversion circuit 13. The power conversion circuit 1
3 receives the output power stop signal from the optical input monitoring circuit 7, and stops the supply of the power V1 into the subscriber side optical transmission device 4. When the supply of the power V1 from the power conversion circuit 13 is stopped, the operations of the signal processing circuit 12 and the like that have been operated by the supply of the power V1 from the power conversion circuit 13 are stopped. At this time, the electric power consumed in the optical transmission device 4 is minimized. On the other hand, the optical input monitoring circuit 7 outputs an output power stop signal to the power conversion circuit 13 and also outputs the signal to the subscriber device 5. Upon receiving the output power stop signal from the optical input monitoring circuit 7, the subscriber unit 5 stops the operation in the subscriber unit. At this time, the power consumed in the subscriber device 5 is minimized. The electric / optical conversion circuit 11 and the optical input monitoring circuit 7 in the subscriber side optical transmission device 4 need to operate even when the supply of the power V1 from the power conversion circuit 13 is stopped. Is supplied from the power conversion circuit 14 in the subscriber side transmission device 4.

In FIG. 3, a signal from the subscriber side optical transmission device 4 is input to a subscriber terminal control circuit 16 in the subscriber unit 5 via a signal processing circuit 15 in the subscriber unit 5. The subscriber terminal control circuit 16 controls the subscriber terminal according to an input signal from the signal processing circuit 15 and outputs a connection request signal from the subscriber terminal 6 to the signal processing circuit 15. The presence / absence of a connection request from the subscriber terminal 6 is detected by detecting the presence / absence of a subscriber terminal current between the subscriber terminal 6 and the subscriber terminal control circuit 16 by the subscriber connection monitoring circuit 8. The subscriber terminal sends the connection request to the subscriber terminal control circuit 1.
When sending to the subscriber terminal 6, the switch in the subscriber terminal 6 is closed. As a result, a subscriber terminal current flows between the subscriber terminal 6 and the subscriber terminal control circuit 16. By detecting the presence or absence of the subscriber terminal current by the subscriber connection monitoring circuit 8, the presence or absence of a connection request from the subscriber terminal 6 can be sensed. The subscriber connection monitoring circuit 8 monitors the presence or absence of a connection request from the subscriber terminal 6, and when there is no connection request from the subscriber terminal 6, the power conversion circuit 117 in the subscriber device 4 To output an output power stop signal.
Upon receiving the output power stop signal from the subscriber connection monitoring circuit 8, the power conversion circuit 117 stops supplying power V1 into the subscriber unit 5. When the supply of the power V1 from the power conversion circuit 17 is stopped, the power conversion circuit 17
The operations of the signal processing circuit 16 and the like that have been operated by the supply of the power V1 are stopped. At this time, the subscriber device 5
The power consumed within is minimal. On the other hand, the subscriber connection monitoring circuit 8 outputs the output power stop signal to the power conversion circuit 17.
, And also to the subscriber-side optical transmission device 4. Upon receiving the output power stop signal from the subscriber connection monitoring circuit 8, the subscriber side optical transmission device 4 stops the operation in the subscriber side optical transmission device. At this time, the power consumed in the optical transmission device 4 is minimized. Note that the subscriber terminal control circuit 116 and the subscriber connection monitoring circuit 8 in the subscriber unit 5 need to operate even when the supply of the power V1 from the power conversion circuit 17 is stopped, Power V2 is supplied from a power conversion circuit 18 in the subscriber unit 5.

As described above, when there is no optical input from the optical transmission device 2 on the exchange side, or when there is no connection request from the subscriber terminal 6, the optical input monitoring circuit 7 and the subscriber connection monitoring circuit 8 control the subscriber. The power supply to the device 5 and the optical transmission device 4 is stopped, and the power burden on the subscriber side is reduced.

[0023]

According to the present invention, when the optical input is interrupted or there is no connection request from the subscriber, the power supply to the subscriber unit and the optical transmission device installed on the subscriber side is stopped to thereby reduce the subscriber. The power borne by the side can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a system according to one embodiment of the present invention.

FIG. 2 is a block diagram of a system according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a system according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Switchboard, 2 ... Optical transmission apparatus, 3 ... Optical fiber, 4 ... Optical transmission apparatus, 5 ... Subscriber apparatus, 6 ... Subscriber terminal, 7 ... Optical input monitoring circuit, 8 ... Subscriber connection monitoring circuit.

Claims (1)

[Claims] 1. An optical transmission apparatus for connecting a subscriber unit accommodating a plurality of subscribers and an exchange with an optical fiber by an optical fiber, detecting an optical input and activating said subscriber unit. It has a subscriber connection monitoring circuit for detecting a connection request from a subscriber and activating the subscriber device. When there is no optical input or a connection request from the subscriber, the function of the subscriber device is stopped. A subscriber-side optical transmission device having a function of activating the subscriber device only when an optical input or a connection request from the subscriber occurs, and a function of outputting light only when activating the subscriber-side optical transmission device. An optical transmission device, comprising: an optical transmission device on the exchange side, wherein the optical transmission device is stopped when the subscriber device and the exchange are not connected.