JP2003244179A - Optical multiple branch communication system, subscriber unit and station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a subscriber unit holds subscriber unit information in signal terminators at the subscriber unit in a working system and a spare system and hence the subscriber unit information need to be changed for the exchange of duplexed subscriber unit signal terminators. <P>SOLUTION: A subscriber unit 2 holds subscriber unit information 8 common to a working system and a spare system. At the initial start up of subscriber unit signal terminators 6, 7, the unit 2 sets up the common subscriber unit information 8 to the subscriber unit signal terminators 6, 7 in the working and spare systems. At registration of the duplexed subscriber units 2 a station unit 1 sets up the common subscriber unit information 8 to the subscriber unit signal terminators 6, 7 in the working and spare systems, respectively, and starts the initial connecting operation with the subscriber unit 2. This improves the maintainability of the subscriber unit signal terminators. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an optical multi-branch (PO).
N: Passive Optical Network) communication system, subscriber device and in-station device, and more particularly to optical multi-branch communication system, subscriber device and in-station device in which PON section is duplicated.

[0002]

2. Description of the Related Art ITU-T (International Telecommunication Union-Telecommunication Standardization Sector: International Telecommunication Unio)
n-Telecommunication) Recommendation G.983.1 defines the configuration of an optical multi-branch communication system.

FIG. 6 is a block diagram showing a schematic configuration of an optical multi-branch communication system described in ITU-T Recommendation G.983.1. An optical multi-branch communication system is a system in which a plurality of subscriber devices and intra-station devices are connected by optical fibers. Reference numeral 101 is an intra-station device, 102a to 102n are subscriber devices, 103 is an ODN (Optical Distribution Network) composed of optical couplers and passive elements such as optical fibers, and 10
Reference numeral 4 denotes a signal terminating unit on the side of the in-station device of the working system, 105 is a signal terminating unit on the side of the in-station device of the protection system, 106 is a signal terminating unit on the side of the subscriber device of the working system, 107 is a signal terminating unit on the side of subscriber device of the protection system 110 is subscriber information of the active system including serial numbers and passwords, 111 is subscriber device information of the standby system including serial numbers and passwords, 112 is connected to the in-station device 101, and the in-station device 101 and the subscriber device 10 are connected.
It is an operation system (hereinafter referred to as OpS) that manages maintenance and monitoring control of 2a to 102n.

According to ITU-T Recommendation G.983.1, a downstream signal from an intra-station device to a subscriber device is broadcast to each subscriber device by an optical splitter, and an upstream signal from the subscriber device to the intra-station device is distributed. , Multiplexed by an optical splitter and sent to an in-station device. At this time, access control (delay control) for multiplexing the upstream signal from the subscriber unit is performed on the optical splitter. This delay control is also ITU-
Recommendation G. 983.1.

Four conventional examples of subscriber information management systems in an optical multi-branch communication system will be described below.

FIG. 7 is a block diagram showing a detailed configuration of the optical multi-branch communication system according to the first conventional example. In the figure, 102 is a subscriber device of any of the subscriber devices 102a to 102n, and 114 and 115 are subscriber device information registrations for registering serial numbers as subscriber device information A and B according to an instruction from OpS112. Section, 120,1
Reference numeral 21 denotes a transmission / reception unit on the intra-station device side that receives the main signal and various control signals from the subscriber device 102 while transmitting the main signal and various control signals to the subscriber device 102. Control signal inserting section for outputting to side transmitting / receiving sections 120, 121, 124, 125 are control signal separating sections for separating various control signals inputted from in-station apparatus side transmitting / receiving sections 120, 121, 126, 127 are subscriber apparatus information registration It is a serial number control unit that retrieves the serial number from the units 114 and 115 and notifies the subscriber unit 102 of the serial number when necessary.

Subscriber unit side transceivers 140 and 141 transmit the main signal and various control signals to the in-station device 101 while receiving the main signal and various control signals from the in-station device 101.
142 and 143 are control signal insertion units for inserting various control signals and outputting them to the subscriber unit side transmitting / receiving units 140 and 141.
44 and 145 are control signal separation units for separating various control signals input from the subscriber unit side transmission / reception units 140 and 141,
148 and 149 are subscriber unit side control signal separation units 144 and
A serial number determination unit that receives the serial number of the subscriber device 102 from 145 and compares it with the serial numbers included in the subscriber device information 110 and 111.

Next, the operation of the first conventional example will be described.

The serial numbers α and β as the subscriber device information A and B are used to identify the only subscriber-side device-side signal termination units 106 and 107 connected to the ODN 103. By turning on the power of the subscriber unit 102, restarting the signal terminating unit, or the like, the signal terminating unit 10 on the station inner side device side
4, 105 and subscriber-side device-side signal terminating units 106, 107
Is physically connected, the intra-station device 101 uses the serial numbers α and β from the subscriber-side device-side signal termination units 106 and 107.
In order to obtain the above, a case where the power of the subscriber unit is turned on and a case where the signal termination unit 106 on the subscriber unit side of the active system is restarted will be described as an example.

The serial numbers α and β are assigned to the signal terminating unit 10 of the other subscriber side device by the manufacturer of the subscriber device 102.
6, 107, and must be uniquely assigned, and is generally given as “vendor code + serial number” and written in a non-volatile memory (not shown) in the subscriber-side device-side signal terminator 106, 107. Has been.

First, in the subscriber device 102, the subscriber device information A,
The serial numbers α and β are written as B, and in the in-station device 101, the OpS 112 has the serial numbers α and β of the subscriber unit side signal terminating units 106 and 107 to be connected in advance.
Are registered in the subscriber device information registration units 114 and 115, respectively.

When the power of the subscriber unit 102 is turned on, the serial number control unit 126,
Reference numeral 127 retrieves the serial numbers α and β of the subscriber-side device-side signal terminating units 106 and 107 to be connected from the subscriber device information registration units 114 and 115, and outputs the intra-station device-side control signal insertion units 122 and 123 and the intra-station device side. Transmitter / receiver 120, 1
The serial numbers .alpha. And .beta. Of the subscriber side device side signal terminating units 106 and 107 to be connected are broadcasted to all the subscriber devices 102a to 102n via 21, and an affirmative response of the corresponding subscriber device 102 is sent. wait.

In the subscriber unit 102, the subscriber unit side transmitting / receiving units 140 and 141 and the subscriber unit side control signal separating unit 1
The serial number determination units 148 and 149, to which the serial numbers α and β are input via 44 and 145, operate in the intra-office device 101.
Further, it is determined whether or not the received serial numbers α and β are addressed to itself, and if they are addressed to itself, the affirmative response is returned. The serial numbers α and β assigned to the signal terminating units 106 and 107 on the subscriber unit side are the signal terminating unit 10 on the subscriber unit side.
6 and 107 are uniquely assigned without duplication, one or less subscriber unit side signal terminating units 106 and 107 return a positive response, and intra-station unit side signal terminating units 104 and 105
Then, the connection between the signal terminating units 106 and 107 on the subscriber unit side is completed.

Next, the operation when the signal terminating unit 106 on the subscriber side device side of the working system of the subscriber unit 102 fails will be described. Signal termination unit 10 on the subscriber side in the working system which has failed
A new subscriber-side device-side signal terminating unit 10 after replacing 6
The serial number γ corresponding to 6 is written in advance in the new working side subscriber side device side signal terminating unit 106, and in the intra-station device 101, OpS112 indicates the subscriber side device side signal terminating unit to be newly connected. It is necessary to register the serial number γ of 106 in the active subscriber information registration unit 114.

In the in-station device 101, the active serial number control unit 126 is used as the active subscriber device information registration unit 11.
4 a new subscriber side device side signal terminating unit 10 to be connected
6, the serial number γ of 6 is taken out, and the in-station device side control signal insertion unit 122 and the in-station device side transmitting / receiving unit 120 of the working system are taken out.
The serial number [gamma] of the new active side subscriber unit side signal terminating unit 106 to be connected is broadcast to all the subscriber units 102a to 102n via
Wait for an acknowledgment of 2.

In the subscriber unit 102, the working serial number judging unit 148 is the transmitting / receiving unit 1 on the working subscriber unit side.
40 and the subscriber unit side control signal separating unit 144,
It is determined whether or not the serial number γ received from the in-station device 101 is addressed to itself, and if it is addressed to itself, the positive response is returned. The serial number γ assigned to the subscriber-side device-side signal terminating unit 106 is the subscriber-side device-side signal terminating unit 10.
Since it is uniquely assigned without overlapping with No. 6, no more than one subscriber-side device-side signal terminating unit 106 returns an affirmative response, and the working-system intra-device-side signal-terminating unit 104 and the new working-system subscriber-side device. The connection of the side signal terminal unit 106 is completed.

FIG. 8 is a block diagram showing the detailed structure of the optical multi-branch communication system according to the second conventional example. In the first conventional example, the serial numbers α, β, and γ are registered from OpS112, but in the second conventional example, an unknown serial number is automatically acquired from the subscriber device without performing registration from OpS112.

In the figure, reference numerals 130 and 131 denote subscriber device information holding units for holding a serial number as subscriber device information acquired from the subscriber device 102 to maintain consistency between the active system and the standby system, and 150 and 151 are subscribers. A serial number mask for receiving a serial number mask indicating a valid serial number portion of the subscriber device 2 from the control signal separators 144, 145 on the subscriber device side and sequentially comparing the serial number masks with the serial numbers included in the subscriber device information 110, 111. It is a processing unit.

Next, the operation of the second conventional example will be described.

First, in the subscriber unit 102, serial numbers α and β are written in advance as subscriber unit information A and B in the subscriber unit side signal termination units 106 and 107, respectively.
In the intra-station device 101, the serial number of the subscriber device 102 to be connected is unknown.

When the power of the subscriber unit 102 is turned on, the serial number control unit 126,
Reference numeral 127 denotes a serial number mask indicating a dummy serial number and a valid serial number portion, and the control signal insertion units 122 and 123 in the station device and the transmitter / receiver unit 120 in the station.
121 via 121 all subscriber devices 102a-102n
Broadcast to and wait for an affirmative response from the subscriber device 102.

In the subscriber unit 102, the serial number mask processing units 150 and 151 are provided in the subscriber unit side transmitting / receiving unit 14.
0, 141 and subscriber unit side control signal separation unit 144, 1
The dummy serial number and the serial number mask received from the in-office device 101 are received via 45, and it is judged whether or not the serial number of the portion indicated by the serial number mask matches with the own serial number, and the coincidence is confirmed. For example, the affirmative response is returned.

The in-station device 101 is the only subscriber device 1
The serial number mask is incremented by 1 bit until a positive response is received from 02, and the same operation is repeated. Finally, the connection between the intra-station device 101 and the subscriber device 102 is completed. This repetitive operation is called a binary tree mechanism and is referred to as ITU-T Recommendation G.264. This operation is described in detail in 983.1. Further, the subscriber device information holding units 130 and 131 share the serial numbers automatically acquired in this operation with each other. That is, the serial number automatically acquired by the active serial number control unit 126 is held by the active subscriber device information holding unit 130 and automatically transferred by being transferred to the standby subscriber device information holding unit 131. Share the serial numbers with each other.

Next, the operation of the subscriber unit 102 when the signal termination unit 106 on the subscriber unit side of the working system fails will be described. The serial number γ corresponding to the new subscriber-side device-side signal terminating unit 106 after replacing the failed working-side subscriber-side device-side signal terminating unit 106 is the new working-side subscriber-side device-side signal terminating unit 106. In the intra-station device 101, it is necessary to initialize (clear) the serial number α of the failed subscriber-side device-side signal terminating unit 106.

In the in-office device 101, the serial number control units 126 and 12 are used in the same manner as when the subscriber device 102 is powered on.
Reference numeral 7 indicates a serial number mask indicating a dummy serial number and a valid serial number portion, and the in-station device side control signal insertion units 122 and 123 and the in-station device side transmission / reception units 120 and 1 are provided.
Broadcast to all subscriber devices 102a-102n via 21 and wait for an acknowledgment of the subscriber device 102.

In the subscriber device 102, the subscriber device 102
The serial number mask processing unit 15
0 and 151 receive the dummy serial number and serial number mask from the in-office device 101 via the subscriber unit side transmitting / receiving units 140 and 141 and the subscriber unit side control signal separating units 144 and 145, and are indicated by the serial number mask. It is determined whether or not the serial number of the designated portion matches with its own serial number, and if they match, the positive response is returned.

In the intra-station device 101, the serial number mask is incremented by 1 bit and the same operation is repeated until a positive response is received from the only subscriber device 102, as in the case of turning on the power of the subscriber device 102. Specifically, the connection between the intra-station device 101 and the subscriber device 102 is completed (binary tree mechanism). Also, the subscriber device information holding unit 1
30 and 131 share the serial numbers automatically acquired in this operation with each other. That is, the serial number automatically acquired by the active serial number control unit 126 is held by the active subscriber device information holding unit 130 and automatically transferred by being transferred to the standby subscriber device information holding unit 131. Share the serial numbers with each other.

FIG. 9 is a block diagram showing the detailed structure of the optical multi-branch communication system according to the third conventional example. The first conventional example and the second conventional example are related to serial numbers, but the optical multi-branching system of the third conventional example does not allow a malicious user to "spoof" as a fake subscriber unit 102. As described above, the in-office device 101 is provided with a user authentication function using a password. That is, the password of the subscriber device 102 to be connected is previously set to OpS112.
Is registered in the intra-station device 101, and when the subscriber device 102 is connected, the password held by the subscriber device 102 is read from the subscriber device 102 and compared (authenticated).

In the figure, 128 and 129 send a request for transmitting the password held by the subscriber unit 102 to the in-station device side control signal inserting units 122 and 123, and the in-station device side control signal separating units 124 and 125 send the subscribers. The password of the device 102 is received, and the subscriber device information registration units 114 and 11 are received.
It is a password determination unit that compares (authenticates) the password extracted from 5. 152 and 153 receive the password transmission request from the subscriber unit side control signal separating units 144 and 145, and receive the subscriber unit side control signal inserting units 142 and 14
3 is a password sending unit for sending the password included in the subscriber device information 110, 111 to the third subscriber.

Next, the operation of the third conventional example will be described.

The passwords α and β as the subscriber device information A and B are the proper subscriber device 10 connected to the ODN 3.
2 is used to authenticate. When the station device 101 and the subscriber device 102 are physically connected by turning on the power of the subscriber device 102 or restarting the signal terminating unit, the station device 101 acquires the passwords α and β from the subscriber device 102. Therefore, a case where the power of the subscriber device is turned on and a case where the signal termination unit 106 on the subscriber side device side of the active system is restarted will be described as an example. The passwords α and β are written in a non-volatile memory (not shown) of the subscriber device 102.

First, in the subscriber unit 102, passwords α and β are previously stored in the subscriber unit side signal terminating units 106 and 107.
Is written in the station device 101, and OpS
Reference numeral 112 denotes a subscriber terminal side signal terminating unit 106, 1 to be connected.
The regular passwords α and β of 07 are registered in the subscriber device information registration units 114 and 115, respectively.

When the subscriber unit 102 is turned on, the password decision units 128, 1 in the in-house unit 101 are turned on.
The subscriber device 1 receives the passwords α and β of the subscriber device 102 via the intra-station device-side control signal insertion units 122 and 123 and the intra-station device-side transceivers 120 and 121.
02, and sends a password transmission request to the communication terminal 02, and waits for a password transmission response from the corresponding subscriber unit 102.

In the subscriber unit 102, the password sending units 152 and 153 are connected to the subscriber unit side control signal inserting unit 14 respectively.
2 and 143 and the subscriber unit side transmitting / receiving units 140 and 141 to send out their own passwords α and β to the in-station device 101.

In the station device 101, the password judgment unit 1
28 and 129 are subscriber device information registration units 114 and 115.
The passwords α, β of the subscriber device 102 to be further connected are extracted, and the passwords α, β received from the subscriber device 102 via the in-station device side transmitting / receiving units 120, 121 and the in-station device side control signal separating units 124, 125. , It is judged whether the password is authentic or not, and if the passwords match the authorized passwords α and β, the connection is permitted.

Next, the operation of the subscriber unit 102 when the signal terminating unit 106 on the subscriber unit side of the working system has a failure will be described. The password γ corresponding to the new subscriber-side device-side signal terminating unit 106 after replacing the failed working-side subscriber-side signal-side terminating unit 106 is previously stored in the new working-side subscriber unit-side signal terminating unit 106. Has been written
In the intra-station device 101, the OpS 112 needs to register the password γ of the subscriber terminal side signal terminating unit 106 to be newly connected in the subscriber device information registering unit 114 of the active system in advance.

In the in-office device 101, the active system password determination unit 128 is used as in the case where the subscriber device 102 is powered on.
Requests the subscriber device 102 to send out a password via the in-station device side control signal insertion unit 122 and the in-station device side transmitting / receiving unit 120 of the active system in order to obtain the password γ of the new subscriber device side signal terminating unit 106. And the corresponding subscriber device 10
Wait for the password transmission response of 2.

In the subscriber device 102, the subscriber device 102
As in the case of turning on the power of the
Reference numeral 2 denotes the in-station device 101 via the subscriber device side control signal insertion unit 142 and the subscriber device side transmitting / receiving unit 140 of the active system.
Send your password γ to.

In the in-office device 101, the active system password determination unit 128 is used as in the case where the subscriber device 102 is powered on.
Retrieves the password γ of the subscriber device 102 to be connected from the new active subscriber device information registration unit 114,
It is determined whether or not the password γ received from the new subscriber-side device-side signal terminating unit 106 via the in-station-side device-side transmitting / receiving unit 120 and the in-station device-side control signal separating unit 124 of the working system is authentic, and the authenticity is confirmed. If it matches the password γ, the connection is permitted.

FIG. 10 is a block diagram showing the detailed structure of the optical multi-branch communication system according to the fourth conventional example. In the above-described third conventional example, the password α was registered from OpS112, but without registering from OpS112, the transmission of the password held in the subscriber device 102 at the time of initial start-up such as installation work is urged, and it is declared at that time. The registered password is registered and managed in the station device 101 as a regular password.

In the figure, reference numerals 130 and 131 denote subscriber device information holding units for holding passwords as subscriber device information acquired from the subscriber device 102 and for maintaining consistency between the active system and the standby system.

Next, the operation of the fourth conventional example will be described.

First, in the subscriber unit 102, the passwords α and β are previously stored in the signal terminating units 106 and 107 on the subscriber unit side.
Is written in the station device 101, the regular password of the subscriber device 102 to be connected is unknown.

Then, when the power of the subscriber unit 102 is turned on, the password judgment units 128 and 129 of the in-office unit 101 are connected.
Is transmitted to the subscriber device 10 via the intra-station device-side control signal insertion units 122 and 123 and the intra-station device-side transceiver units 120 and 121.
2, the password transmission request is made to acquire the passwords α and β of the subscriber device 102, and the password transmission response of the corresponding subscriber device 102 is waited for.

In the subscriber unit 102, the password sending units 152 and 153 are provided in the subscriber unit side control signal inserting unit 14 respectively.
2 and 143 and the subscriber unit side transmitting / receiving units 140 and 141 to send out their own passwords α and β to the in-station device 101.

In the station device 101, the password judgment unit 1
28 and 129 via the intra-station device side transmitting / receiving sections 120 and 121 and the intra-station apparatus side control signal separating sections 124 and 125,
The subscriber device information holding unit 1 uses the passwords α and β received from the subscriber device 102 as authorized passwords for connection.
Holds at 30, 131 and completes initial connection at startup.

Next, a description will be given of the operation when the signal terminating unit 106 on the subscriber unit side of the working system of the subscriber unit 102 fails and the defective signal terminating unit 106 on the subscriber unit side of the working system is replaced. The password γ corresponding to the new subscriber-side device-side signal terminating unit 106 is written in advance in the new working subscriber-side device-side signal terminating unit 106, and the intra-station device 10
In No. 1, it is necessary to initialize (clear) the password α of the failed subscriber-side device-side signal terminating unit 106.

In the in-office device 101, the active system password determination unit 128 is used, as when the subscriber device 102 is powered on.
Requests the subscriber device 102 to send out a password via the in-station device side control signal insertion unit 122 and the in-station device side transmitting / receiving unit 120 of the active system in order to obtain the password γ of the new subscriber device side signal terminating unit 106. And the corresponding subscriber device 10
Wait for the password transmission response of 2.

In the subscriber device 102, the subscriber device 102
As in the case of turning on the power of the
Reference numeral 2 denotes the in-station device 101 via the subscriber device side control signal insertion unit 142 and the subscriber device side transmitting / receiving unit 140 of the active system.
Send your password γ to.

In the intra-station device 101, the active system password determination unit 128 has the active system subscriber device information holding unit 130.
Password γ of the subscriber device 102 to be newly connected
Password γ received from the new subscriber-side device-side signal terminating unit 106 via the in-station-device-side transmitting / receiving unit 120 and the in-station device-side control signal separating unit 124 of the active system.
, It is judged whether it is authentic or not, and if it matches the authentic password γ, the connection is permitted.

In addition to the first to fourth conventional examples, the PON
As a prior art relating to a subscriber information management system in an optical subscriber system in which the section is not duplicated, Japanese Patent Laid-Open No. 9-187242
No. 93280, “PDS transmission system”, JP-A-1
There are Japanese Patent Publication No. 1-416678, "Subscriber system", and Japanese Patent Laid-Open No. 2000-13426, "Optical transmission device". Also, P
As prior art relating to a transmission system which is not ON, Japanese Patent Laid-Open No. 5-153093 “redundant transmission system” and Japanese Patent Laid-Open No.
-191425 "Ring transmission path network path setting method".

[0052]

According to the conventional subscriber unit information management method, the serial number for uniquely identifying the subscriber unit side signal terminating units 106 and 107 by the intra-station unit side signal terminating units 104 and 105 is the subscriber. Device-side signal termination unit 106, 1
One is held in 07. For this reason, when the subscriber unit side signal terminating units 106 and 107 are duplicated, it is necessary to hold a serial number for each subscriber unit side signal terminating unit 106 and 107. Therefore, when replacing the signal termination units 106 and 107 on the subscriber unit side for maintenance purposes, etc.,
I also had to change my serial number.

Further, one password for the in-office device 101 to authenticate the authorized subscriber device 102 is held in each of the subscriber device side signal terminating units 106 and 107. For this reason, when the signal terminating units 106 and 107 on the subscriber unit side are duplicated, it is necessary to hold a password for each of the signal terminating units 106 and 107 on the subscriber unit side. Therefore, when replacing the subscriber terminal side signal terminating units 106 and 107 for maintenance purposes, it is necessary to change the password as well.

The object of the present invention is to make it easy to maintain the subscriber unit because it is not necessary to set or change the subscriber unit information such as serial number and password when registering the subscriber unit or exchanging the signal terminating unit on the subscriber unit side. It is to be.

[0055]

In an optical multi-branch communication system according to the present invention, a subscriber unit terminates a first optical transmission line terminating unit terminating a first optical transmission line and a second optical transmission line terminating unit. Two optical transmission line terminating units are provided, and subscriber device information common to the first optical transmission line terminating unit and the second optical transmission line terminating unit is held.

Further, in the optical multi-branch communication system according to the present invention, the subscriber device information is a serial number for identifying the subscriber devices or a password given to each subscriber device.

Further, in the optical multi-branch communication system according to the present invention, the subscriber device information is information held in advance by the in-station device and the subscriber device, and is transmitted from one of the in-station device and the subscriber device. By comparing the subscriber device information that was saved with the subscriber device information that the other has,
Decide whether to make the initial connection.

Further, in the optical multi-branch communication system according to the present invention, the subscriber device information is information held in advance by the subscriber device, and is generated by the in-station device and transmitted to the subscriber device. By comparing the information with the subscriber device information held by the subscriber device, it is determined whether or not the initial connection is performed.

Further, in the optical multi-branch communication system according to the present invention, the subscriber device information is information held in advance by the subscriber device, and when the subscriber device information is transmitted from the subscriber device to the in-station device. Make an initial connection to.

Further, in the optical multi-branch communication system according to the present invention, the intra-station device has a first optical transmission line terminating unit which terminates the first optical transmission line and a second optical transmission line termination which terminates the second optical transmission line. And the subscriber device information acquired by performing the initial connection of one of the first optical transmission line terminating unit and the second optical transmission line terminating unit is notified to the other.

Further, the subscriber unit according to the present invention comprises a first optical transmission line terminating unit terminating the first optical transmission line and a second optical transmission line terminating unit terminating the second optical transmission line. The first optical transmission line termination unit and the second optical transmission line termination unit hold common subscriber device information.

Further, the intra-station device according to the present invention comprises a first optical transmission line terminating unit terminating the first optical transmission line and a second optical transmission line terminating unit terminating the second optical transmission line. The subscriber device information acquired by performing the initial connection of one of the first optical transmission line termination unit and the second optical transmission line termination unit is notified to the other.

[0063]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a block diagram showing a schematic configuration of an optical branch communication system according to a first embodiment of the present invention. In the figure, 1 is an in-house device, 2a
2n is a subscriber unit, 3 is an ODN (Optical Distribution Net) composed of optical couplers and passive elements such as optical fibers.
work), 4 is a signal terminating unit on the side of the in-station device in the working system, 5 is a signal terminating unit on the side of the in-station device of the standby system, 6 is a signal terminating unit on the side of the subscriber unit of the working system, and 7 is a signal on the subscriber unit side of the standby system End, 8
Is subscriber device information including serial number, password, etc., 10 is a subscriber device information holding unit of the active system for setting the subscriber device information 8, 11 is standby device information for the subscriber device information 8 The holding unit 12 is an operation system (hereinafter referred to as OpS) that is connected to the intra-station device 1 and controls maintenance and monitoring control of the intra-station device 1 and the subscriber devices 2a to 2n.

FIG. 2 is a block diagram showing a detailed configuration of the optical multi-branch communication system of FIG. In the figure, 2 is any one of the subscriber devices 2a to 2n,
Reference numeral 15 is a subscriber device information registration unit for registering subscriber device information including a serial number, a password and the like according to an instruction from OpS 12, and 20, 21 send a main signal and various control signals to the subscriber device 2. In-station device side transceiver unit that receives the main signal and various control signals from the subscriber device 2,
Reference numerals 2 and 23 are control signal insertion sections for inserting various control signals and outputting them to the in-station device side transmitting / receiving sections 20 and 21, and 24 and 25 are controls for separating various control signals input from the in-station apparatus side transmitting / receiving sections 20 and 21. The signal separation units 26 and 27 are serial number control units that take out the serial numbers from the subscriber device information registration units 14 and 15 and notify the subscriber device 2 if necessary.

40 and 41 send main signals and various control signals to the intra-station device 1, while subscriber device side transceivers that receive the main signal and various control signals from the intra-station device 1, and 42 and 43 send various control signals. Inserted and transmitted / received by the subscriber unit 40, 4
1 is a control signal inserting unit, 44 and 45 are control signal separating units that separate various control signals input from the subscriber unit side transmitting and receiving units 40 and 41, and 48 and 49 are control signal separating units 4.
This is a serial number determination unit that receives the serial number of the subscriber device 2 from 4, 45 and compares it with the serial number retrieved from the subscriber device information holding units 10 and 11.

Next, the operation of the first embodiment will be described.

Serial number α as subscriber device information A
Is used to identify the only subscriber device 2 connected to the ODN 3. By turning on the power of the subscriber unit 2 and restarting the signal termination units 106 and 107,
When the in-station device 1 and the subscriber device 2 are physically connected, the in-station device 1 acquires the serial number α from the subscriber device 2. Therefore, when the power of the subscriber device is turned on and when the subscriber device of the active system is used. The case where the side signal terminating unit 106 is restarted will be described as an example.

Further, the serial number α must be uniquely assigned by the manufacturer of the subscriber unit 2 without duplication with the subscriber unit 2, and is generally given as “vendor code + serial number”. It is written in a nonvolatile memory (not shown) of the device 2 or the like.

First, when the power of the subscriber unit 2 is turned on, the serial number α is set to the subscriber unit information holding units 10 and 11, respectively.
In the intra-station device 1, the OpS 12 registers the serial number α of the subscriber device 2 to be connected in advance in the subscriber device information registration units 14 and 15, respectively.

In the intra-office device 1, the serial number control unit 2
6 and 27 retrieve the serial number α of the subscriber device 2 to be connected from the subscriber device information registration units 14 and 15,
The serial number α of the subscriber device 2 to be connected is broadcasted to all the subscriber devices 2a to 2n via the intra-station device side control signal inserting units 22 and 23 and the intra-station device side transmitting / receiving units 20 and 21. It waits for a positive response from the corresponding subscriber unit 2.

In the subscriber unit 2, the serial number judging unit 4
Reference numerals 8 and 49 retrieve the serial number α of the subscriber device from the subscriber device information holding units 10 and 11, and send and receive the subscriber device side transceiver unit 4
0, 41 and the subscriber unit side control signal separating units 44, 45 determine whether or not the serial number α received from the in-station device 1 is addressed to itself, and if it is addressed to itself, the positive response is given. return. Since the serial number α assigned to the subscriber unit 2 is uniquely assigned without duplication with other subscriber units 2, no more than one subscriber unit 2 responds with an affirmative response, and the intra-station unit 1 and the subscriber unit 2 Connection is completed.

Next, the operation of the subscriber unit 2 when the signal terminating unit 6 on the subscriber unit side of the working system fails will be described. When replacing the subscriber-side device-side signal terminating unit 6 of the faulty working system, the serial number α is reset in the new working subscriber device information holding unit 10, and the in-station device 1 should be connected. The serial number α of the subscriber device 2 has already been registered in the active subscriber device information registration unit 14.

In the intra-station device 1, the active serial number control unit 26 retrieves the serial number α of the subscriber device 2 to be connected from the active subscriber device information registration unit 14, and controls the in-station device of the active system. The serial number α of the subscriber device 2 to be connected is broadcasted to all the subscriber devices 2a to 2n via the signal insertion unit 22 and the intra-station device side transmitting / receiving unit 20,
It waits for a positive response from the corresponding subscriber unit 2.

In the subscriber unit 2, the active serial number judging unit 48 retrieves its own serial number α from the active subscriber device information holding unit 10, and the active subscriber unit side transmitting / receiving unit 40 and the subscriber unit. It is determined whether or not the serial number α received from the intra-office device 1 is addressed to itself via the control signal separation unit 44 on the side of the worker device, and if it is addressed to itself, the affirmative response is returned. Since the serial number α assigned to the subscriber device 2 is uniquely assigned without duplication with other subscriber devices 2, no more than one subscriber device 2 responds with an affirmative response, and the intra-station device 1 and the subscriber device 2 The connection of 2 is completed.

Here, the active subscriber device information holding unit 1
0 and the standby subscriber information holding unit 10 hold the same serial number α, but since they are not connected on the same optical transmission, there is no problem even if the serial numbers α are duplicated, and the connection is completed. To do.

In this way, by sharing the serial number between the active system and the standby system, the operator of OpS12 can use the serial number each time even when the subscriber side device side signal terminating units 6 and 7 are replaced for maintenance. There is no need to change α, which simplifies maintenance operations.

Embodiment 2. FIG. 3 is a block diagram showing a detailed configuration of the optical multi-branch communication system according to the second embodiment of the present invention. The schematic configuration of the optical multi-branch communication system is the same as that of the first embodiment shown in FIG. In the first embodiment, the serial number α is OpS12.
However, in the second embodiment, the OpS
This is to automatically obtain an unknown serial number from the subscriber device 2 without performing registration from 12.

In the figure, reference numerals 30 and 31 denote subscriber unit information holding units for holding serial numbers and passwords obtained from subscriber units, and for maintaining consistency between the active system and the standby system, and 50 and 5 respectively.
A serial number 1 receives a serial number mask indicating a valid serial number portion of the subscriber unit 2 from the control signal separating units 44 and 45, and sequentially compares the serial number masks with the serial numbers extracted from the subscriber unit information holding units 10 and 11. A number mask processing unit.

Next, the operation of the second embodiment will be described.

First, when the power of the subscriber unit 2 is turned on, the serial number α is set to the subscriber unit information holding units 10 and 11, respectively.
And the serial number of the subscriber device 2 to be connected is unknown in the intra-station device 1.

In the station device 1, the serial number control unit 2
Reference numerals 6 and 27 denote serial number masks indicating the dummy serial number and the valid serial number portion, and the in-station device-side control signal insertion units 22 and 23 and the in-station device-side transceiver units 20 and 2, respectively.
1 to broadcast to all the subscriber devices 2a to 2n and wait for an affirmative response from the corresponding subscriber device 2.

In the subscriber unit 2, the serial number mask processing units 50 and 51 take out their own serial numbers α from the subscriber unit information holding units 10 and 11, and the subscriber unit side transmitting / receiving units 40 and 41 and the subscriber unit side. Control signal separation unit 44, 4
The dummy serial number and the serial number mask are received from the in-office device 1 via 5, and it is determined whether or not the serial number of the portion indicated by the serial number mask matches with its own serial number. Returns an affirmative response.

In the in-station device 1, the serial number mask is incremented by 1 bit until an acknowledgment is received from only one in-house device 2, the same operation is repeated, and finally, in-station device 1 and in-subscriber device 2 are repeated. Connection is completed. This repetitive operation is called the binary tree mechanism, and
UT Recommendation G. This operation is described in 983.1. Also, the subscriber device information holding units 30 and 31 share the serial numbers automatically acquired in this operation. That is, the serial number automatically acquired by the active serial number control unit 26 is held by the active subscriber device information holding unit 30 and automatically transferred by being transferred to the standby subscriber device information holding unit 31. Share the serial numbers with each other.

Next, the operation of the subscriber unit 2 when the signal termination unit 6 on the subscriber unit side of the working system fails will be described. When replacing the subscriber-side device-side signal terminating unit 6 of the working system that has failed, the serial number α is reset in the subscriber-device information holding unit 10 of the working system. In the initial connection operation, the serial number α of the subscriber device 2 to be connected is already registered in the active subscriber device information registration unit 14.

In the station device 1, the same as in the first embodiment,
The active system serial number processing unit 26 extracts the serial number α of the subscriber device 2 to be connected from the active system subscriber device information registration unit 14, and the active system in-station device side control signal insertion unit 22 and the in-station device. The serial number α of the subscriber device 2 to be connected is broadcasted to all the subscriber devices 2a to 2n via the side transmitting / receiving unit 20, and the affirmative response of the corresponding subscriber device 2 is waited for.

In the subscriber unit 2, as in the first embodiment, the working serial number judging unit 48 retrieves its own serial number α from the working subscriber device information holding unit 10 and joins the working unit. It is determined whether or not the serial number α received from the in-office device 1 is addressed to itself via the transmission / reception unit 40 on the side of the subscriber unit and the control signal separation unit 44 on the side of the subscriber unit. return it. The serial number α assigned to the subscriber device 2 is assigned to another subscriber device 2
Since it is uniquely assigned without duplication, one or less subscriber devices 2 return an affirmative response, and the connection between the intra-station device 1 and the subscriber device 2 is completed.

Here, the active subscriber device information holding unit 1
0 and the standby subscriber device information holding unit 11 hold the same serial number α, but since they are not connected on the same optical transmission, there is no problem even if the serial numbers α are duplicated, and the connection is completed. .

By thus sharing the serial number between the active system and the standby system, the operator of OpS12 can use the serial number every time even when the subscriber side device side signal terminating units 6 and 7 are replaced for maintenance. There is no need to initialize α, which simplifies maintenance operations. Further, the number of occurrences of the binary tree operation can be suppressed, and the intra-station device 1 and the subscriber device 2
The connection time can be shortened.

Third Embodiment FIG. 4 is a block diagram showing a detailed configuration of the optical multi-branch communication system according to the third embodiment of the present invention. The schematic configuration of the optical multi-branch communication system is the same as that of the first embodiment shown in FIG. Although the first and second embodiments relate to the serial number, in the third embodiment, a malicious user in the optical multi-branch communication system sends a false subscriber device 2
In order to prevent "spoofing", the in-station device 1 is provided with a user authentication function using a password.
That is, in the third embodiment, the OpS 12 registers the password of the subscriber device to be connected in advance in the intra-station device 1, and when the subscriber device 2 is connected, the subscriber device 2 holds 2 of the subscriber device. Read password for comparison (authentication)
To do.

In the figure, 28 and 29 send a request for transmitting the password held by the subscriber unit 2 to the intra-station unit side control signal inserting units 22 and 23, and the subscriber unit 2 from the intra-station unit side control signal separating units 24 and 25. It is a password determination unit that receives the password of the device 2 and compares (authenticates) the passwords retrieved from the subscriber device information registration units 14 and 15. 5
2, 53 receive the password sending request from the subscriber device side control signal separating units 44, 45, and send the passwords taken out from the subscriber information holding units 9, 10 to the subscriber device side control signal inserting units 42, 43. This is a password sending unit for sending.

Next, the operation of the third embodiment will be described.

Password α as subscriber device information A
Is used to authenticate the legitimate subscriber device 2 connected to the ODN 3. When the station device 1 and the subscriber device 2 are physically connected to each other by turning on the power of the subscriber device 2 or restarting the signal terminating unit, the station device 1 obtains from the subscriber device 2 and therefore the subscriber device 2 is acquired. The case where the power is turned on and the case where the signal side terminal unit 6 on the subscriber side of the active system is restarted will be described as an example. The password α
Are written in a non-volatile memory (not shown) of the subscriber device 2.

First, when the power of the subscriber unit 2 is turned on, the password α is set in the subscriber unit information holding units 10 and 11, respectively. The password α is registered in each of the subscriber device information registration units 14 and 15.

In the in-office device 1, the password judgment unit 28,
29 sends a password transmission request to the subscriber device 2 to acquire the password α of the subscriber device 2 via the intra-station device side control signal insertion units 22 and 23 and the intra-station device side transmission / reception units 20 and 21. Wait for the password transmission response of the device 2.

In the subscriber unit 2, the password sending unit 5
2 and 53 send their own password α to the in-station device 1 via the subscriber device side control signal insertion units 42 and 43 and the subscriber device side transmission / reception units 40 and 41.

In the station device 1, the password judgment unit 28,
Numeral 29 retrieves the password α to be connected from the subscriber device information registration units 14 and 15, and transmits and receives the password α to the in-office device side to
1 and the in-station device side control signal separation units 24 and 25,
It is determined whether the password α received from the subscriber device 2 is authentic, and if the password α matches the authentic password α, the connection is permitted.

Next, the operation of the subscriber unit 2 when the signal termination unit 6 on the subscriber unit side of the working system has failed will be described. In the case of replacing the faulty working side subscriber unit side signal terminating unit 6, the password α is reset in the working side subscriber unit information holding unit 10 as in the case of the first embodiment, and the in-station device is reset. In No. 1, the password α of the subscriber device 2 to be connected has already been registered in the active subscriber device information registration unit 14.

In the in-station device 1, the active-system password determination unit 28 receives the in-station device-side control signal insertion unit 22 and the in-station device-side transceiver unit 20 in the same way as when the subscriber device 2 is powered on. , The password transmission request is sent to the subscriber device 2 in order to acquire the new password α of the subscriber device 2, and the password transmission response of the corresponding subscriber device 2 is waited for.

In the subscriber unit 2, as in the case of turning on the power of the subscriber unit 2, the active password sending unit 52 has the active unit subscriber unit side control signal inserting unit 42 and the subscriber unit side transmitting / receiving unit 40. It sends its own password α to the in-office device 1 via.

In the in-office device 1, the active system password judgment unit 28 extracts the password α to be connected from the new active system subscriber device information registration unit 14 as in the case of turning on the power of the subscriber device 2. Transmitter / receiver 20 on the in-station device side of the active system
Also, it is determined whether the password α received from the subscriber device 2 via the intra-station device side control signal separating unit 24 is authentic, and if the password α matches the authentic password α, the connection is permitted.

By thus sharing the password between the active system and the standby system, the signal terminating unit 6 on the subscriber side device side 6,
The operator of OpS12 does not need to change the password α each time even when the maintenance replacement of 7 is performed, and the maintenance operation is simplified.

Fourth Embodiment FIG. 5 is a block diagram showing a detailed configuration of the optical multi-branch communication system according to the fourth embodiment of the present invention. The schematic configuration of the optical multi-branch communication system is the same as that of the first embodiment shown in FIG. In the third embodiment described above, the password α is set to Op.
Although it was registered from S12, in the fourth embodiment,
This is to prompt the transmission of the password held in the subscriber device 2 at the time of initial startup such as installation work without registering from OpS12, and to register and manage the password declared at that time in the in-office device 1 as a regular password. .

In the figure, reference numerals 30 and 31 denote subscriber device information holding units for holding the serial numbers and passwords acquired from the subscriber device 2 and keeping them consistent between the active system and the standby system.

Next, the operation of the fourth embodiment will be described.

First, when the power of the subscriber unit 2 is turned on, the password α is set in the subscriber unit information holding units 10 and 11, respectively, and in the in-office unit 1, the regular password of the subscriber unit 2 to be connected is unknown. .

In the in-office device 1, the password judgment unit 28,
Numeral 29 requests the subscriber device 2 to send a password through the in-station device-side control signal insertion units 22 and 23 and the in-station device-side transceivers 20 and 21 in order to obtain the regular password α of the subscriber device 2, and to apply the corresponding subscription. It waits for the password transmission response of the worker device 2.

In the subscriber unit 2, the password sending unit 5
2 and 53 send their own password α to the in-station device 1 via the subscriber device side control signal insertion units 42 and 43 and the subscriber device side transmission / reception units 40 and 41.

In the station device 1, the password judgment unit 28,
29 is a subscriber device information holding unit 30 as a regular password to connect the password α received from the subscriber device 2 via the in-station device side transmitting / receiving units 20 and 21 and the in-station device side control signal separating units 24 and 25. , 31 to complete the initial connection at startup. Further, the subscriber device information holding units 30 and 31 share the passwords acquired in the initial connection with each other. That is, the regular password α acquired by the active password determining unit 28 is held by the active subscriber device information holding unit 30, and the standby subscriber device information holding unit 3 is held.
Share the passwords obtained by transferring to 1 as well.

Next, the operation when the signal terminating unit 6 on the subscriber unit side of the working unit of the subscriber unit 2 fails will be described. When replacing the failed subscriber unit side signal terminating unit 6 of the working system, the password α is reset in the subscriber unit information holding unit 10 of the working system, and the in-station device 1 makes an initial connection at the time of startup. The regular password α of the subscriber device 2 to be connected with is already registered in the active subscriber device information registration unit 14.

In the in-station device 1, the active system password determination unit 28 receives the in-station device side control signal insertion unit 22 and the in-station device side transceiving unit 20 in the same manner as when the subscriber unit 2 is powered on. , The password transmission request is sent to the subscriber device 2 to obtain the password α of the subscriber device 2, and the password transmission response of the corresponding subscriber device 2 is waited for.

In the subscriber unit 2, as in the case of turning on the power of the subscriber unit 2, the active password sending unit 52 includes the active unit subscriber unit side control signal inserting unit 42 and the subscriber unit side transmitting / receiving unit 40. It sends its own password α to the in-office device 1 via.

In the intra-station device 1, the active-system password judgment unit 28 extracts the password α to be connected from the active-system subscriber device information holding unit 30, and the active-system intra-station device side transmission / reception unit 20 and intra-station device side control are performed. It is determined whether the password α received from the subscriber device 2 via the signal separating unit 24 is authentic, and if the password α matches the authentic password α, the connection is permitted.

By thus sharing the password between the active system and the standby system, the signal terminating unit 6 on the subscriber side device side is formed.
The operator of OpS12 does not have to initialize the password α each time even when the maintenance replacement of 7 is performed.
Maintenance operations are simplified.

[0114]

As described above, according to the optical multi-branch communication system of the present invention, the subscriber unit has the first optical transmission line terminating unit terminating the first optical transmission line and the second optical transmission line. Since the second optical transmission line terminating unit is provided, and the first optical transmission line terminating unit and the second optical transmission line terminating unit hold common subscriber unit information, There is no need to set or change subscriber device information when registering or exchanging the optical transmission line terminating part on the subscriber device side, and the maintainability of the optical transmission line terminating part on the subscriber device side is excellent.

Further, according to the optical multi-branch communication system of the present invention, the subscriber device information is a serial number for identifying the subscriber devices or a password assigned to each subscriber device. Since setting or changing is not originally required when registering the subscriber unit or replacing the optical transmission line terminating unit on the subscriber unit side, maintenance management of the optical transmission line terminating unit on the subscriber unit side can be simplified.

Further, according to the optical multi-branch communication system of the present invention, the subscriber device information is information held in advance by the in-station device and the subscriber device, and is transmitted from one of the in-station device and the subscriber device. By collating the transmitted subscriber device information with the subscriber device information held by the other, it is determined whether or not to make the initial connection, so that the reliability of the connection can be improved.

Further, according to the optical multi-branch communication system of the present invention, the subscriber device information is information held in advance by the subscriber device, and the subscriber device information generated by the in-station device and transmitted to the subscriber device. It is necessary to register the subscriber device information in the in-station device in advance in order to determine whether to make the initial connection by comparing the subscriber device information with the subscriber device information held by the subscriber device. , The maintainability of the system is further improved.

Further, in the optical multi-branch communication system according to the present invention, the subscriber device information is information held in advance by the subscriber device, and when the subscriber device information is transmitted from the subscriber device to the intra-station device. Since the initial connection is carried out, the collation work of the subscriber device information can be omitted and the maintainability of the system is further improved.

Further, in the optical multi-branch communication system according to the present invention, the intra-station device comprises a first optical transmission line termination unit terminating the first optical transmission line and a second optical transmission line termination terminating the second optical transmission line. In order to notify the subscriber device information acquired by making an initial connection to one of the first optical transmission line terminating unit and the second optical transmission line terminating unit to the other. The verification result of the subscriber device information or the notification result of the subscriber device information can be diverted to the other, and the connection time between the in-office device and the subscriber device can be shortened.

According to the subscriber unit of the present invention,
A first optical transmission line terminating unit terminating the first optical transmission line and a second optical transmission line terminating unit terminating the second optical transmission line;
Since the optical transmission line terminating unit and the second optical transmission line terminating unit hold common subscriber unit information, the subscriber is registered when registering the subscriber unit or exchanging the optical transmission line terminating unit on the subscriber unit side. Since there is no need to set or change the device information, the maintainability of the optical transmission line terminal of the subscriber device is excellent.

Further, according to the intra-station device of the present invention, it is provided with the first optical transmission line terminating unit terminating the first optical transmission line and the second optical transmission line terminating unit terminating the second optical transmission line. Since the subscriber device information acquired by performing the initial connection of one of the first optical transmission line termination unit and the second optical transmission line termination unit is notified to the other, it is obtained in one of the duplex systems. The subscriber device information can be diverted to the other, and the effect is that the connection time between the in-station device and the subscriber device can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an optical multi-branch communication system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a detailed configuration according to the first embodiment of the present invention, which shows the details of the optical multi-branch communication system in FIG.

FIG. 3 is a diagram showing a detailed configuration according to a second embodiment of the present invention shown in FIG.

FIG. 4 is a diagram showing a detailed configuration according to a third embodiment of the present invention shown in FIG.

5 is a diagram showing a detailed configuration according to a fourth embodiment of the present invention shown in FIG.

FIG. 6 is a block diagram showing a schematic configuration of an optical multi-branch communication system described in ITU-T Recommendation G.983.1.

FIG. 7 is a block diagram showing a detailed configuration of an optical multi-branch communication system according to a first conventional example.

FIG. 8 is a block diagram showing a detailed configuration of an optical multi-branch communication system according to a second conventional example.

FIG. 9 is a block diagram showing a detailed configuration of an optical multi-branch communication system according to a third conventional example.

FIG. 10 is a block diagram showing a detailed configuration of an optical multi-branch communication system according to a fourth conventional example.

[Explanation of symbols]

1 station device, 2a to 2n subscriber device, 3 ODN,
4 in-station device side signal terminating unit as a working system, 5 in-station device side signal terminating unit as a standby system, 6 subscriber device side signal terminating unit as a working system, 7 subscriber device side signal terminating unit as a standby system, 8 subscriber device information, 10 subscriber device information holding unit as an active system, 11 subscriber device information holding unit as a standby system, 12 operation system, 1
4 subscriber device information registration unit as active system, 15 subscriber device information registration unit as standby system, 20 in-station device side transceiver unit as active system, 21 in-station device side transceiver unit as standby system, 22 as active system In-station device-side control signal insertion unit, 23 In-station device-side control signal insertion unit as a backup system, 24 In-station device-side control signal separation unit as a working system,
25 Intra-station device side control signal separation unit as a backup system, 26
Serial number control unit as active system, 27 Serial number control unit as standby system, 28 Password determination unit as active system, 29 Password determination unit as standby system, 30 Subscriber device information holding unit as active system, 31
Subscriber device information holding unit as a standby system, 40 Subscriber device side transmitting / receiving unit as a working system, 41 Subscriber device side transmitting / receiving unit as a standby system, 42 Subscriber device side control signal inserting unit as a working system, 43 Subscriber apparatus side control signal insertion section as a standby system, 44 Subscriber apparatus side control signal separation section as a working system, 45 Subscriber apparatus side control signal separation section as a standby system, 48 Serial number judging section as a working system , 49 Serial number determination unit as a backup system, 50
Serial number mask processing unit as active system, 51 Serial number mask processing unit as standby system, 52 Password sending unit as active system, 53 Password sending unit as standby system

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5K030 GA11 HA08 HC01 JL03 MD02                 5K033 AA06 CC01 DA15 DB02 DB22                       EB03 EB06                 5K050 BB06 BB17 DD21 DD30 GG11                 5K051 AA09 DD07 DD14 HH01 HH17                       KK06 LL07

Claims (8)

[Claims] 1. An intra-station device and a plurality of subscriber devices are physically connected via a branched first optical transmission line and a second optical transmission line, and a unique device assigned to each subscriber device is provided. In the optical multi-branch communication system for performing initial connection so as to enable communication between the intra-station device and the subscriber device by notifying subscriber device information between the intra-station device and the subscriber device, A first optical transmission line terminating unit terminating the first optical transmission line and a second optical transmission line terminating unit terminating the second optical transmission line, wherein the first optical transmission line terminating unit and the second optical transmission line terminating unit are provided. An optical multi-branch communication system, which holds common subscriber unit information with a unit. 2. The optical multi-branch communication system according to claim 1, wherein the subscriber device information is a serial number for identifying the subscriber devices or a password given to each subscriber device. . 3. The subscriber device information is information held in advance by the in-station device and the subscriber device, and is held by the in-station device and the subscriber device information transmitted from one of the in-station device and the other. 3. The optical multi-branch communication system according to claim 1, wherein whether or not to make an initial connection is determined by collating with existing subscriber device information. 4. The subscriber device information is information held in advance by the subscriber device, and the subscriber device information generated by the in-station device and transmitted to the subscriber device and the subscription held by the subscriber device. 3. The optical multi-branch communication system according to claim 1, wherein whether or not the initial connection is performed is determined by collating the information with the user device information. 5. The subscriber device information is information held in advance by the subscriber device, and the initial connection is made when the subscriber device information is transmitted from the subscriber device to the in-station device. Item 3. The optical multi-branch communication system according to Item 1 or 2. 6. The intra-station device comprises a first optical transmission line terminating unit terminating the first optical transmission line and a second optical transmission line terminating unit terminating the second optical transmission line, and the first optical transmission line is provided. 6. The optical multi-branch communication system according to claim 4, wherein the subscriber unit information acquired by performing the initial connection of one of the terminating unit and the second optical transmission line terminating unit is notified to the other. 7. The in-station device is physically connected to the in-station device via a branched first optical transmission line and second optical transmission line, and notifies the in-station device of unique subscriber device information or the in-station device. Is notified by the first optical transmission line terminating unit that terminates the first optical transmission line and the second optical transmission in the subscriber device that performs initial connection so as to be able to communicate with the in-station device. A second optical transmission line terminating unit for terminating a line,
A subscriber device, wherein common subscriber device information is held by the optical transmission line terminating unit and the second optical transmission line terminating unit. 8. A unique subscriber device information which is physically connected to a plurality of subscriber devices via a branched first optical transmission line and a second optical transmission line, and which is given to each subscriber device. Is notified to the subscriber device or is notified from the subscriber device, and in the intra-station device that performs initial connection so that communication with the subscriber device becomes possible, the first optical transmission line A first optical transmission line terminating unit terminating and a second optical transmission line terminating unit terminating the second optical transmission line;
An intra-station device characterized by notifying subscriber device information acquired by performing an initial connection to one of the optical transmission line terminating unit and the second optical transmission line terminating unit.