JP4615609B2 - PON system, subscriber side device connection method, station side device, and subscriber side device - Google Patents

Description

  The present invention relates to a passive optical network (hereinafter referred to as a “PON system”) in which a station side device and a plurality of subscriber side devices perform 1-to-N communication via an optical transmission line, and a subscriber side device. It relates to a connection method.

  Conventionally, for example, a PON system defined in Non-Patent Document 1 is known. Hereinafter, with reference to FIG. 1 to FIG. 5, an outline of a portion related to the present invention in a conventional PON system defined in Non-Patent Document 1 will be described.

  FIG. 1 is a block diagram showing a configuration example of a conventional PON system. In the PON system shown in FIG. 1, a plurality of subscriber side devices (Optical Network Unit: hereinafter referred to as “ONU”) 120 are optically connected to a station side device (Optical Line Termination: hereinafter referred to as “OLT”) 100. This is a configuration connected via a transmission line 130. An operation system (Operations System: hereinafter referred to as “OpS”) 140 operated by a communication carrier is connected to the OLT 100.

  The optical transmission line 130 has one trunk optical fiber 131 connected at one end to the OLT 100, a plurality of branch optical fibers 132 connected at one end to the plurality of ONUs 120, the other end of the trunk optical fiber 131, and a plurality of branches. The splitter 133 is an optical branching coupler that connects the other end of the optical fiber 132.

  The OLT 100 holds a physical layer termination function unit 101 that terminates the physical layer on the OLT side, a service node interface function unit 102 that connects the physical layer termination function unit 101 to various external service nodes, and operation parameters of the OLT. And a monitoring control function unit 104 that monitors and controls the above-described units and performs various settings in the OLT.

The ONU 120 monitors and controls the physical layer termination function unit 121 that terminates the physical layer on the ONU side, the user interface function unit 122 that connects a not-shown terminal and the physical layer termination function unit 121, and the physical layer termination function unit 121. a monitoring control function unit 123 to perform various settings in the ONU and, the individual body number holding unit 124 to be subjected to the use of physical layer termination function unit 121 retains the individual member number assigned at the time of ONU production (serial number) I have.

  Next, FIG. 2 is a conceptual diagram illustrating a communication form performed between the OLT and the ONU. In FIG. 2, a case where three ONUs 120 a, 120 b, and 120 c of subscriber A, subscriber B, and subscriber C communicate with the OLT 100 is shown. FIG. 2A shows a form of a downlink signal transmitted from the OLT to the ONU. FIG. 2B shows the form of an uplink signal transmitted from the ONU to the OLT.

  As shown in FIG. 2A, the downlink signal ABC transmitted from the OLT 100 to the three ONUs 120a, 120b, and 120c is transmitted from the trunk optical fiber 131 to each branch optical fiber 132 by broadcast. The three ONUs 120a, 120b, and 120c are configured to capture a signal addressed to the own ONU from the received downlink signal ABC.

  As shown in FIG. 2B, the three ONUs 120a, 120b, and 120c branch the upstream signal in a timing relationship such that the upstream signal sent to the branch optical fiber 132 is time-division multiplexed on the trunk optical fiber 131. Send to optical fiber 132. This is because the OLT 100 uses the identification information of each ONU to schedule the upstream signal transmission time of each ONU so that the upstream signal does not collide, and the downstream control signal is used to prevent the upstream signal from colliding with each ONU. This is realized by notifying the timing (see FIG. 3).

  FIG. 3 is a diagram for explaining uplink signal transmission timing control performed by the OLT. In FIG. 3, the OLT assigns identification information “01”, “02”, and “03” to three ONUs to schedule the uplink signal transmission time, and the transmission permission signal 301 that is a downlink control signal causes time to be transmitted to ONU_01. The slot T1 is designated, the time slot T2 is designated for ONU_02, and the time slot T3 is designated for ONU_03. As a result, the upstream signal to the OLT is time-division multiplexed without colliding.

As can be understood from the description of FIG. 3, when a new ONU is connected to the PON system, the OLT needs to give identification information to the newly connected ONU. At this time, a plurality of ONUs may be connected to the PON system at the same time. Therefore, OLT requires a mechanism that can provide identification information for each ONU. Since this imparts a unique individual member numbers when ONU production, OLT is registered in the database 103 to obtain the individual body number in two ways described below (see FIGS. 4 and 5), and the registration it can be realized by giving identification information to each ONU by specifying the individual member numbers.

Next, with reference to FIGS. 4 and 5, illustrating a method of registering an ONU of the individual member numbers in the database 103 of the OLT 100. Figure 4 is a diagram operator (communication carrier) will be described how to register the ONU of the individual member numbers OLT100 with OpS140. In this way, the operator has to assume that the previously knows the ONU of the individual member numbers that are connected to the OLT 100.

Figure 4 (a), the a ONU120d with individual member numbers "S / N = 00800002", and the 120e with individual member numbers "S / N = 00000501" are to be installed anew.
Figure 4 (b), the operator two ONU120d the OLT 100, and inputs the "S / N" number body number 120e using OpS140. In the OLT 100, the monitoring control function unit 104 assigns identification information “01” and “02” and holds them in the database 103. The database 103 holds “ONU — 01: S / N = 000001001” and “ONU — 02: S / N = 00800002”.

In FIG. 4 (c), the monitoring control unit 104 of the OLT sets the individual body number read from the database 103 to the physical layer termination function section 101. The physical layer termination function unit 101 periodically repeats the identification information provision procedure until the identification information provision to the ONU having the set individual number is completed. ONU120d, in 120e, the physical layer termination function section 121, OLT 100 performs the granted number body number (S / N = 00800002, S / N = 00000501) during ONU production held in individual member number holding unit 124 only reacts if the specified by the identification information assignment procedure individual member numbers match. As a result, identification information ONU_02 is assigned to the ONU 120d, and identification information ONU_01 is assigned to the ONU 120e.

Figure 5 is a diagram for explaining a method of OLT100 obtains the number body number autonomously ONU. In this way, the operator does not need to know in advance the ONU of the individual member numbers that are connected to the OLT 100.

5 (a), and ONU120f with individual member numbers "S / N = 00000501", and a 120g with individual member numbers "S / N = 00800002" are to be installed anew.

In FIG. 5 (b), the uplink physical layer termination function 101 OLT100 is, according to an instruction by the operator operation from periodically or OpS140, ONU120f the identification information is not given, the relative 120g informs the own individual body number Allow sending messages. ONU120f that are allowed to transmit from the OLT 100, the 120 g, the physical layer termination function 201, granted individual member numbers when ONU production held in individual member number holding unit 124 (S / N = 00000501, S / N = 00800002) is transmitted. In OLT100, ONU120f, when receiving the uplink message containing 120g of individual member numbers (S / N = 00000501, S / N = 00080002), the monitoring control function unit 104 is incorporated into the database 103.

Figure 5 (c), the monitoring control unit 104 of the OLT, taken in the database 103 ONU120f, the identification information "01""02" to 120g of the individual member numbers (S / N = 00000501, S / N = 00080002) assign. As a result, the database 103 holds “ONU — 01: S / N = 000001001” and “ONU — 02: S / N = 00800002”. Then, the monitoring control unit 104 sets the number body number read from the database 103 to the physical layer termination function section 101. Thereafter, the same identification information providing procedure as that in FIG. 4C is performed, the identification information ONU_01 is assigned to the ONU 120f, and the identification information ONU_02 is assigned to the ONU 120g.

  Here, in the PON system, the OLT sets, for each ONU, a delay time until each ONU receives a transmission permission signal and performs uplink data transmission. This is because the ONU reaction time varies depending on the distance from the OLT to the ONU, so that the response time is set to a constant value by setting the delay time individually for each ONU, and the upstream signal is multiplexed without gaps at the OLT receiving end. It is.

The above-described identification information provision procedure and the above delay time setting are referred to as a “ranging process”, and the state of the ONU that has completed this ranging process is defined as an “operational state”. Further, FIG. 4 shows female method operator (communication carrier) to register the ONU of the individual member numbers from OpS the OLT is defined as "ranging method A", OLT obtains the number body number autonomously ONU The method shown in FIG. 5 is defined as “ranging method B”.

ITU-T Recommendation G. 983.1 (SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS) Digital transmission systems−Digital section and digital line system−Optical line systems for local and access Broadband optical access based on Passive Optical Networks (PON)

By the way, in order to provide a communication service to a subscriber, various settings such as a band and a connection destination based on a contract with each subscriber are required. In addition, it is necessary not to provide services to subscribers whose contracts have not been completed or whose fees have not been paid. Therefore, the OLT, not only the number body number ONU, it is necessary to manage also information about the subscriber using the ONU.

In ranging method A, since performed in cooperation with the ONU installation in the subscriber's home under the contract (FIG. 4 (a)) and the number body numbers to OLT (S / N) register (FIG. 4 (b)) , operator (operators) have to understand the correspondence between the subscriber and the ONU individual body number. In other words, it is possible to set the service contents of correspondence, that contract to the OLT of the database and the ONU individual body number and the subscriber. Therefore, the OLT can start a service corresponding to the contract contents immediately after the ranging process for the registered ONU is completed.

On the other hand, the ranging method B, submitted as described in FIG. 5, even without knowing the ONU of the individual member numbers operator (communication carrier) is connected to the OLT, it can be an ONU in operation state, OLT In this database, only contracted service contents are set. Therefore, OLT is, it is not possible to identify belongs to which subscriber is acquired individual body number, it can not be certain of contracted subscribers of determining whether or contracted service content, ONU connection of subscriber There is a problem that the service cannot be started immediately afterwards.

  For this reason, the ranging method A has been adopted in the conventional PON system. However, in recent years, an environment in which a subscriber purchases an ONU from a mass retailer or the like and connects to the OLT independently (hereinafter referred to as “terminal open environment”). There is a growing demand to be able to respond to this. In response to this request, the ranging method A has a problem that it cannot cope with the terminal open environment because the communication carrier must manage the ONU which is a home device.

  Therefore, although it is necessary to construct a PON system that can implement the ranging method B that can cope with the terminal open environment, how to enable the OLT to identify the subscriber in the terminal open environment is a problem.

  The present invention has been made in view of the above, and in a terminal open environment, a PON system and a subscriber side that can immediately start a service by performing autonomous ranging on an ONU purchased and installed by a subscriber An object is to obtain a device connection method.

In order to solve the above-described problems and achieve the object, the present invention provides a new ONU in a PON system in which a plurality of ONUs (Optical Network Units) are connected to a station side device via an optical transmission line . When a connection is detected, a ranging process for setting the ONU of the new connection to the operating state is executed based on the individual number acquired from the ONU of the new connection, and for the ONU of the new connection that is in the operating state, A means for issuing a PLOAM message for inquiring a password for subscriber confirmation, obtaining a PLOAM response message as a password message from the ONU of the new connection, and the ONU of the new connection based on the password of the PLOAM response message Determine whether to start service provision A station-side device further comprising: means for specifying service content corresponding to the ONU of the new connection, and performing at least one of bandwidth setting and connection setting based on the specified service content; and And an ONU including means for returning a PLOAM response message as the password message when the PLOAM message is received .
The following invention is a subscriber-side device connection method for a PON system in which a plurality of ONUs (Optical Network Units) are connected to a station-side device via an optical transmission line. When an ONU connection is detected, a ranging process for the new connection ONU is executed, and a PLOAM message for inquiring a password is issued to the new connection ONU. In response to the PLOAM message from the device, the PLOAM response message for notifying the password is issued, and the station side device starts providing the service to the ONU based on the password acquired from the PLOAM response message from the ONU. Determine whether and further subscribers and services Contents to identify, based on the specified service content was, and performing at least one of out-band configuration and connection configuration.
Further, the next invention is a station-side device that connects a plurality of subscriber-side devices via an optical transmission line in the PON system, and detects a connection of a new subscriber-side device to the optical transmission line. Based on the individual number acquired from the newly connected subscriber side device, a ranging process for setting the newly connected subscriber side device in an operating state is executed, and the newly connected subscriber side device after the ranging process is further executed. A PLOAM message for inquiring a password for subscriber confirmation, a means for acquiring a PLOAM response message as a password message from the newly connected subscriber side device, and the new password based on the acquired password Determine whether to start providing services to the connected subscriber side device, and the new connected subscriber contracts Identify that service contents, based on the specified service contents were characterized by comprising a means for performing at least one of bandwidth setting and connection settings.
Further, the next invention is a subscriber side device connected to a station side device via an optical transmission line in a PON system, and means for holding an individual number and means for holding a password for subscriber confirmation In the ranging process of the station side device, the individual number of the own device is transmitted through the optical transmission line, and after receiving the PLOAM message inquiring the password from the station side device after the ranging process, a PLOAM response message is sent as a password message. And physical layer termination means for performing the identification of the contract service contents based on the password and at least one of the bandwidth setting and the connection setting based on the identified contract service contents. To do.

  According to the present invention, in the PON system, that is, in the PON system, the plug-and-run that can immediately start the service by performing autonomous ranging on the subscriber side device purchased and installed by the subscriber in the terminal open environment. The play function can be realized.

FIG. 1 is a block diagram showing a configuration example of a conventional PON system. FIG. 2 is a conceptual diagram illustrating a communication mode performed between the OLT and the ONU shown in FIG. FIG. 3 is a diagram for explaining uplink signal transmission timing control performed by the OLT shown in FIG. Figure 4 is a diagram operator (communication carrier) will be described how to register the ONU of the individual member numbers to the OLT using the OpS shown in FIG. Figure 5 is a diagram OLT shown in FIG. 1 will be described how to obtain the individual body number autonomously ONU. FIG. 6 is a block diagram showing the configuration of the PON system according to Embodiment 1 of the present invention. FIG. 7 is a sequence diagram for explaining the connection procedure of the subscriber side apparatus implemented in the PON system shown in FIG. FIG. 8 is a block diagram showing a configuration of a PON system according to the second embodiment of the present invention. FIG. 9 is a sequence diagram for explaining the connection procedure of the subscriber side apparatus implemented in the PON system shown in FIG.

  Embodiments of a PON system and a subscriber apparatus connection method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 6 is a block diagram showing the configuration of the PON system according to Embodiment 1 of the present invention. In the PON system shown in FIG. 6, a plurality of subscriber side devices (Optical Network Unit: hereinafter referred to as “ONU”) 620 are optically connected to a station side device (Optical Line Termination: hereinafter referred to as “OLT”) 600. In this configuration, the transmission line 630 is connected. An operation system (Operations System: hereinafter referred to as “OpS”) 640 operated by a telecommunications carrier is connected to the OLT 600.

  The optical transmission line 630 has one trunk optical fiber 631 connected at one end to the OLT 600, a plurality of branch optical fibers 632 connected at one end to the plurality of ONUs 620, the other end of the trunk optical fiber 631, and a plurality of branches. The splitter 633 is an optical branching coupler that connects the other end of the optical fiber 632.

  The OLT 600 holds a physical layer termination function unit 601 that terminates the physical layer on the OLT side, a service node interface function unit 602 that connects the physical layer termination function unit 601 to various external service nodes, and operation parameters of the OLT. And a monitoring control function unit 604 that monitors and controls each of the above units and performs various settings in the OLT.

The ONU 620 monitors and controls the physical layer termination function unit 621 that terminates the physical layer on the ONU side, the user interface function unit 622 that connects a terminal (not shown) and the physical layer termination function unit 621, and the physical layer termination function unit 621. a monitoring control function unit 623 to perform various settings in the ONU and a number body number holding unit 624 to be subjected to the use of physical layer termination function unit 621 retains the individual member number assigned at the time of ONU production (serial number), A password holding function unit 625 for holding a password set by the subscriber and for use of the physical layer termination function unit 621;

  In the first embodiment, a PLOAM (Physical Layer Operation and Maintenance), which is a physical layer control message, is an example of a method for realizing a plug-and-play function for specifying a new subscriber and immediately starting a service in an open terminal environment. The case of using a message is shown.

  Hereinafter, the plug and play function realized in the PON system shown in FIG. 6 will be described with reference to FIG. FIG. 7 is a sequence diagram for explaining the connection procedure of the subscriber side apparatus implemented in the PON system shown in FIG.

  In FIG. 7, in procedure T <b> 1, the subscriber 701 and the communication carrier 702 make a contract, and the communication carrier 702 issues a password of 10 bytes or less to the subscriber 701.

  In procedure T2, the communication carrier 702 operates OpS 640 to set the password issued to the subscriber 701 and the service contents such as the contracted service connection destination and allocated bandwidth in the database 603 of the OLT 600.

  In procedure T3 and procedure T4, the subscriber 701 inputs the password within 10 bytes issued by the communication carrier 702 to the password holding function unit 625 of the ONU 620 that has purchased the purchased ONU 620 as a subscriber line (branch line optical fiber). 632).

In step T5, OLT 600, when performing the ranging process according to the ranging method B, submitted monitors the connection whether new ONU, detects the connection of a new ONU620, obtains the individual member numbers from ONU620 of the new connection, Identification information is added, a delay time is set, and the ONU 620 is put into an operating state.

  In step T6, the OLT 600 then transmits a Request_password message, which is a control message (PLOAM message) for inquiring a password to the ONU 620 that has been put into operation.

  In step T7, the ONU 620 receives the Request_password message, and notifies the password (Password) message, which is a response message defined in the PLOAM message, including the password set in step T3.

  In step 8, the OLT 600 extracts a password from the received Password message, and searches the database 603 using the password as a search key.

  In step T9, if there is a password that matches the database 603, the OLT 600 extracts the service content set in the database 603, and performs connection setting and allocation bandwidth setting for the corresponding ONU 620. As a result, the service can be started immediately after the connection for the subscriber who uses the newly connected ONU 620.

  If there is no password matching the database 603, it means that the subscriber is an unsigned subscriber. In this case, the OLT 600 does not provide services to the corresponding ONU and prevents unauthorized use. I have to.

  As described above, according to the first embodiment, since the subscriber is identified by using the password for the ONU in which the OLT has autonomously completed the ranging, the ONU purchased by the subscriber who has completed the contract at the mass sales store is identified. The service can be started immediately after connecting to the network. That is, the plug and play function required for the PON system in the terminal open environment can be realized.

Embodiment 2. FIG.
FIG. 8 is a block diagram showing a configuration of a PON system according to the second embodiment of the present invention. In FIG. 8, components that are the same as or equivalent to the components shown in FIG. 6 (Embodiment 1) are given the same reference numerals. Here, the description will be focused on the portion related to the second embodiment.

  That is, as shown in FIG. 8, in the PON system according to the second embodiment, an ONU 820 is provided instead of the ONU 620 in the configuration shown in FIG. 6 (the first embodiment). In the ONU 820, a subscriber information holding function unit 825 that holds subscriber information such as an address and a name set by the subscriber is provided instead of the password holding function unit 625 in the ONU 620. The subscriber information holding function unit 825 is connected to the monitoring control function unit 623.

  In the second embodiment, as another example of a method for realizing a plug-and-play function for specifying a new subscriber and immediately starting a service in an open terminal environment, a control message of a monitoring control channel provided between the OLT and the ONU The case of using is shown.

  Hereinafter, the plug and play function realized by the PON shown in FIG. 8 will be described with reference to FIG. FIG. 9 is a sequence diagram for explaining the connection procedure of the subscriber side apparatus implemented in the PON system shown in FIG.

  In FIG. 9, in the procedure T10, the subscriber 901 and the communication carrier 902 make a contract.

  In procedure T11, the communication carrier 902 operates OpS640 to set the subscriber information such as the address and name of the subscriber 901 and the service contents such as the contracted service connection destination and allocated bandwidth in the database 603 of the OLT 600. To do.

  In procedure T12 and procedure T13, the subscriber 901 inputs subscriber information such as address and name into the subscriber information holding function unit 825 of the purchased ONU 820, and the purchased ONU 820 is connected to the subscriber line (branch line optical fiber 632). Connect to.

In step T14, OLT 600, when performing the ranging process according to the ranging method B, submitted monitors the connection whether new ONU, detects the connection of a new ONU820, obtains the individual member numbers from ONU820 of the new connection, Identification information is added, a delay time is set, and the ONU 820 is put into an operating state.

  In procedure T15, the OLT 600 then sets a monitoring control channel with the ONU 820 that has been put into operation.

  In procedure T16 and procedure T17, the OLT 600 requests subscriber information from the ONU 820 using the control message by the set monitoring control channel, and the ONU 820 notifies the OLT 600 of the subscriber information set in the procedure T12.

  In step T18, the OLT 600 searches the database 603 using the received subscriber information as a search key.

  In step T19, if there is subscriber information that matches the database 603, the OLT 600 extracts the service content set in the database 603, and performs connection setting and allocation bandwidth setting for the corresponding ONU 820. As a result, the service can be started immediately after the connection for the subscriber who uses the newly connected ONU 820.

  If there is no matching subscriber information in the database 603, it means that the subscriber is an unsigned subscriber. In this case, as in the first embodiment, the OLT 600 provides a service to the corresponding ONU. To prevent unauthorized use.

  As described above, according to the second embodiment, for the ONU in which the OLT has autonomously completed the ranging, the subscriber is identified using the subscriber information. The service can be started immediately after the ONU is connected to the network. That is, as in the first embodiment, the plug and play function required for the PON system can be realized in the terminal open environment.

  Here, in the subscriber identification method using the PLOAM message, since the number of bytes of the control message that can be used is limited, as described in the first embodiment, only a password that requires a small number of bytes is used. .

  On the other hand, in the method using the monitoring control channel between the OLT and the ONU according to the second embodiment, there is no limit on the amount of information exchanged between the OLT and the ONU. Information can be exchanged between the OLT and the ONU to identify the subscriber.

  As described above, the PON system and the subscriber-side device connection method according to the present invention perform autonomous ranging on the subscriber-side device arbitrarily purchased and installed by the subscriber, and Since identification can be performed, it is suitable for realizing a plug-and-play function required for the PON system in a terminal open environment.

100,600 Station side equipment (OLT)
101, 121, 601, 621 Physical layer termination function unit 102, 602 Service node interface function unit 103, 603 Database 104, 123, 604 Monitoring control function unit 120, 120a, 120b, 120c, 120d, 120e, 120f, 120g, 620 , 820 Subscriber side equipment (ONU)
122,622 user interface function unit 124,624 pieces body number holding unit 130,630 the optical transmission line 131,631 trunk optical fiber 132,632 branch optical fibers 133,633 splitter 140,640 Operation System (OpS)
625 Password holding function part 825 Subscriber information holding function part

Claims (4)

In a PON system in which a plurality of ONUs (Optical Network Units) are connected to a station side device via an optical transmission line,
Upon detecting the connection of a new ONU, perform the ranging process to operate state ONU of the new connection, based on acquired from ONU of the new connection number body number, further, of the new connection became operational state against ONU, based on the subscriber confirmation issue a PLOAM message inquiring a password for password of the new means to obtain the PLOAM response message as a password message from the ONU connections, and the PLOAM response message, the new It is determined whether to start providing a service to the connection ONU, and the service content corresponding to the new connection ONU is specified , and at least one of the bandwidth setting and the connection setting is determined based on the specified service content. Means to do,
A station side device comprising:
Means for returning a PLOAM response message as the password message upon receipt of the PLOAM message from the station side device;
ONU with
PON system characterized by comprising. In the PON system subscriber side device connection method in which a plurality of ONUs (Optical Network Units) are connected to the station side device via an optical transmission line, respectively.
The station-side apparatus, when detecting a connection of a new ONU, perform the ranging process for ONU of the new connection, further issues a PLOAM message inquiring a password for ONU of the new connection,
The newly connected ONU issues a PLOAM response message for notifying the password in response to the PLOAM message from the station side device,
The station-side apparatus, based on the password obtained from the PLOAM response message from the ONU, determines whether to initiate the service provided to the ONU, further identifies the subscriber and service content, specific A subscriber-side device connection method in a PON system, wherein at least one of bandwidth setting and connection setting is performed based on the service content. A station side device that connects a plurality of subscriber side devices via an optical transmission line in a PON system,
Upon detection of connection to the optical transmission line of the new subscriber units, ranging process to operate state subscriber unit of the new connection, based on the acquired from the subscriber unit of the new connection number body number And a PLOAM message for inquiring a password for subscriber confirmation to the newly connected subscriber side device after the ranging process, and a password message from the newly connected subscriber side device. Means for obtaining a PLOAM response message;
Based on the obtained password, wherein the determining whether to start the service provided to the subscriber unit a new connection, to identify further services which the subscriber has subscribed for the new connection, identified Means for performing at least one of bandwidth setting and connection setting based on the service content;
A station-side device comprising: A subscriber side device connected to a station side device via an optical transmission line in a PON system,
It means for holding the individual member numbers,
Means for maintaining a password for subscriber verification;
Transmitting the individual body number of its own apparatus via the optical transmission path in the ranging process of the optical line terminal receives the PLOAM message inquiring the password from the station side device after the ranging process, the PLOAM response message as a password message A physical layer termination unit that returns and performs the specification of the contract service content based on the password, and at least one of the bandwidth setting and the connection setting based on the specified contract service content,
A subscriber-side device comprising:

Images