WO2009081597A1 - Subscriber premises optical network unit - Google Patents

Subscriber premises optical network unit Download PDF

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Publication number
WO2009081597A1
WO2009081597A1 PCT/JP2008/054346 JP2008054346W WO2009081597A1 WO 2009081597 A1 WO2009081597 A1 WO 2009081597A1 JP 2008054346 W JP2008054346 W JP 2008054346W WO 2009081597 A1 WO2009081597 A1 WO 2009081597A1
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WO
WIPO (PCT)
Prior art keywords
serial
unit
optical
signal
onu
Prior art date
Application number
PCT/JP2008/054346
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French (fr)
Japanese (ja)
Inventor
Katsuya Aboshi
Kazutaka Shimoosako
Kunio Odaka
Original Assignee
The Furukawa Electric Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Furukawa Electric Co., Ltd. filed Critical The Furukawa Electric Co., Ltd.
Priority to CN200880000869.9A priority Critical patent/CN101584156B/en
Publication of WO2009081597A1 publication Critical patent/WO2009081597A1/en
Priority to HK10102918.3A priority patent/HK1134870A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring

Definitions

  • the present invention relates to a subscriber premises optical line terminator installed in a subscriber premises in a PON type optical transmission system.
  • an optical transmission path connected to a center is branched by a passive splitter, and an optical transmission path is laid to a plurality of subscriber homes.
  • a PON (Passive-Optical-Network) type optical transmission system is used.
  • Such an optical transmission system is also called PDS (Passive Double Double Star).
  • a center optical line termination device (OLT: Optical Line Termination) 901 is connected to a multiplexing end of a splitter 903 via an optical fiber 902, and a plurality of splitters 903 are connected.
  • OLT Optical Line Termination
  • ONU Optical Network Units
  • FIG. 9 The configuration of ONU905-1,... 905-n is shown in FIG.
  • This figure shows the configuration of the ONU 905-1 as an example, and the ONU 905-1 includes an optical transceiver unit 906, an ONU function unit 907, and an Ethernet (registered trademark) interface 908.
  • An optical fiber 904-1 connected to the splitter 903 is connected to the optical transceiver unit 906 via an optical termination unit 909 provided in each subscriber's house.
  • Ethernet (registered trademark) interface 908 10/100 / 1000BASE-TX or the like can be used, and for example, a LAN cable 910 is connected thereto.
  • a terminal device 914 such as a computer or a printer can be directly connected to the LAN cable 910, or a switch such as a router 912 or a switching hub 913 can be connected to another terminal device 914.
  • JP-A-9-214541 JP-A-9-214541
  • an object of the present invention is to provide a subscriber premises optical line terminator capable of reading and setting operation information using a serial interface. .
  • the first aspect of the subscriber premises optical line terminator according to the present invention is connected to the center side optic line terminator via an optical transmission line and connected to an external node via a signal line to perform termination processing.
  • An optical line terminator which is connected to the center side optical line terminator and performs photoelectric conversion and reverse photoelectric conversion of a main signal; and is connected to the electric / optical conversion unit and is connected to the main signal.
  • An optical line terminator function unit that performs signal termination processing, a serial / parallel conversion unit that is connected to the optical line terminator function unit and performs serial / parallel conversion and inverse serial / parallel conversion of the main signal, and the serial A main signal IF (interface) unit that is connected to the parallel / parallel conversion unit and inputs / outputs the main signal to / from the external node, a first serial IF unit that inputs / outputs a predetermined serial signal, and power supply
  • the And an interface module having a power supply IF unit connected to a power supply line and a ground line, and when a predetermined condition is satisfied, a first serial signal terminal provided in the optical line terminator function unit;
  • the first serial IF unit is electrically connected.
  • the predetermined condition is satisfied when a predetermined voltage is applied to the ground line, and the first condition is satisfied when the predetermined condition is not satisfied.
  • the serial signal terminal and the first serial IF section are electrically cut off.
  • the apparatus when the predetermined condition is satisfied, switching is performed to electrically connect the first serial signal terminal and the first serial IF unit.
  • the apparatus further comprises means.
  • the switching means connects the first serial IF unit and the first serial signal terminal when the predetermined condition is satisfied. It is a switch circuit that is electrically connected and otherwise electrically cuts off between the first serial IF section and the first serial signal terminal.
  • the switch circuit is provided in the first serial IF unit and the electrical / optical conversion unit when the predetermined condition is not satisfied.
  • the second serial signal terminal is electrically connected.
  • the interface module further includes a second serial IF unit, and the second serial IF unit is provided in the electrical / optical conversion unit. Further, the second serial signal terminal is connected.
  • the first serial signal end and the second serial signal end provided in the electrical / optical conversion unit are connected to the first serial IF unit.
  • the switching means determines that the predetermined condition is satisfied, the access from the first serial IF section to the optical line terminator function section via the first serial signal end It is characterized by permitting.
  • the first serial signal terminal and the first serial IF unit are connected by I2C.
  • the second serial signal terminal and the first serial IF unit are connected by I2C.
  • a subscriber premises optical line terminating device capable of reading and setting operation information by switching the serial interface to be usable.
  • FIG. 1 is a block diagram showing a configuration of a subscriber premises optical line termination unit (ONU) according to the first embodiment of the present invention.
  • FIG. 2 shows an example of a PON type optical transmission system configured using the ONU 100 of this embodiment shown in FIG.
  • the PON interface card 10 provided in the center has an optical line terminator (OLT) 11 and an authentication function unit 12, and performs optical transmission to the optical input / output terminal of the OLT 11.
  • OLT optical line terminator
  • One end of the optical fiber 20 that is a path is connected.
  • the optical coupler (optical multiplexing / demultiplexing unit) 30 has one multiplexing end and two or more demultiplexing ends. The other end of the optical fiber 20 connected to the OLT 11 is connected to the multiplexing end. It is connected.
  • each of a plurality of optical fibers 40-1,..., 40-n (n: natural number, hereinafter referred to as 40-1 to n) is connected to the demultiplexing end of the optical coupler 30, and the other end Are connected to ONUs 50-1 to 50-n.
  • the downstream signal from the OLT 11 is demultiplexed by the optical coupler 30 and transmitted to each of the ONUs 50-1 to 50-n, while the optical signal transmitted from each of the ONUs 50-1 to 50-n is transmitted to the optical coupler 30.
  • the OLT 11 is demultiplexed by the optical coupler 30 and transmitted to each of the ONUs 50-1 to 50-n, while the optical signal transmitted from each of the ONUs 50-1 to 50-n is transmitted to the optical coupler 30.
  • Each of the ONUs 50-1 to 50-n is installed in each subscriber's house, and an external node 70 such as a personal computer or a switch is connected to the ONUs.
  • the external node 70 is a switch, and a plurality of terminal devices 80 are connected to a plurality of ports 70a provided in the switch.
  • the switch used for the external node 70 include an L2 switch, an L3 switch, and a router. With such a configuration, a plurality of terminal devices 80 can be connected to the center OLT 11 via the ONU 100.
  • the OLT 11 and ONUs 50-1 to 50-n are GPON (abbreviation for Gigabit Passive Optical Network, compliant with ITU standard G.984.x), GEPON (Gigabit Ethernet (registered trademark) PON), and IEEE802. A device that conforms to the 3) standard) is used.
  • the ONU 100 of the present embodiment can be used for the ONUs 50-1 to 50-n shown in FIG. In the following, it is assumed that the ONU 100 is used as the ONU 50-1.
  • the ONU 100 of this embodiment includes an electrical / optical converter (TRx) 110, an optical line terminator function unit (hereinafter referred to as an ONU function unit) 120, and a serial / parallel converter (SERDES) 130. And an interface module 140.
  • TRx electrical / optical converter
  • ONU function unit optical line terminator function unit
  • SERDES serial / parallel converter
  • first serial transmission lines 150a (downstream signal lines) and 150b (upstream signal lines) for transmitting serial electrical signals between the electrical / optical conversion section 110 and the ONU function section 120.
  • the ONU function unit 120 and the serial / parallel conversion unit 130 are connected by parallel transmission paths 151a (downstream signal lines) and 151b (upstream signal lines) for transmitting parallel electric signals.
  • the parallel signal transmitted through the parallel transmission paths 151a and 151b can be, for example, a 10-bit signal.
  • the serial / parallel converter 130 and the interface module 140 are connected by second serial transmission lines 152a (downstream signal lines) and 152b (upstream signal lines) for transmitting serial electrical signals.
  • the electrical / optical converter 110 has an optical input / output terminal for transmitting and receiving an optical signal to and from the center-side OLT 11 via the optical fiber 40, and the light of the main signal transmitted from the center OLT 11.
  • the signal (downstream signal) is converted into an electrical signal (photoelectric conversion).
  • This electrical signal is output to the ONU function unit 120 via the first serial transmission line 150a which is a downstream signal line.
  • the electrical / optical conversion unit 110 converts the electrical signal of the main signal input from the ONU function unit 120 via the first serial transmission line 150b that is an upstream signal line into an optical signal (reverse photoelectric conversion). .
  • This optical signal is transmitted to the OLT 11 via the optical fiber 40.
  • the ONU function unit 120 converts the serial signal input from the electrical / optical conversion unit 110 into a parallel signal, performs a predetermined termination process, and then converts this signal to a serial / parallel via a parallel transmission path 151a that is a downstream signal line.
  • the data is output to the conversion unit 130.
  • the ONU function unit 120 converts the parallel signal input from the serial / parallel conversion unit 130 through the parallel transmission path 151b, which is an upstream signal line, into a serial signal after performing a predetermined termination process, thereby converting the electrical / optical
  • the data is output to the conversion unit 110.
  • the serial / parallel conversion unit 130 includes serial / parallel conversion means and reverse serial / parallel conversion means (not shown).
  • the parallel signal input from the ONU function unit 120 is converted into a serial signal by the reverse serial / parallel conversion means.
  • the data is output to the interface module 140 via the second serial transmission line 152a which is a downstream signal line.
  • the serial / parallel converter 130 converts the serial signal input from the interface module 140 via the second serial transmission path 152b into a parallel signal by the serial / parallel converter and outputs the parallel signal to the ONU function unit 120. .
  • the interface module 140 is connected to the external node 70 by a serial electric signal.
  • the interface module 140 corresponds to the MSA (Multi-Source Agreement) interface standard, and can be directly connected to an MSA interface slot (not shown) provided in the external node 70. It is configured. Examples of MSA interface standards include GBIC and SFP.
  • the interface module 140 includes a main signal IF unit 141, a first serial IF unit 142, a second serial IF unit 143, and a power feeding IF unit 144.
  • Second serial transmission lines 152 a and 152 b that are connected to the serial / parallel conversion unit 130 and transmit a main signal input / output to / from the external node 70 are connected to the main signal IF unit 141.
  • the ONU function unit 120 and the electrical / optical conversion unit 110 include a first serial signal terminal 121 and a second serial signal terminal 111, respectively, and the first serial IF unit 142 and the second serial signal terminal 111, respectively. It is connected to the IF unit 143.
  • the signal lines 161a and 161b between the second serial signal terminal 111 and the second serial IF unit 143 are configured by I2C.
  • An I2C (Inter Integrated Circuit) signal line is composed of two signal lines, a serial data transmission signal line 161a and a clock transmission signal line 161b.
  • a power supply line 162 a and a ground line 162 b are connected to the power supply IF unit 144.
  • the interface module 140 When the interface module 140 is connected to the external node 70, the ground line 162b is grounded, and power is supplied from the external node 70 to the ONU 100 via the power supply line 162a.
  • the signal lines 160 a and 160 b are also connected to the first serial signal terminal 121 of the ONU function unit 120, and the other ends of these signal lines are connected to the first serial IF unit 142. ing.
  • switch circuits 170a and 170b are provided in the middle of the signal lines 160a and 160b.
  • relays, switches, and diodes are used as the switch circuits 170a and 170b.
  • I2C signal lines can be used similarly to the signal lines 161a and 161b.
  • a GPIO signal line connected to a GPIO terminal (not shown) of the ONU function unit 120 may be used.
  • the switch circuits 170a and 170b branch and connect the ground line 162b in order to input a control signal.
  • the voltage applied to the ground line 162b is used as a control signal and the signal lines 160a and 160b are energized. It is controlled to shut off. That is, when the ground line 162b is grounded, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. On the other hand, when a predetermined voltage is applied to the ground line 162b, the switch circuits 170a and 170b are energized and the signal lines 160a and 160b can be energized.
  • the ONU 100 In the normal operation of the ONU 100, the ONU 100 is connected to the MSA interface slot of the external node 70, and at this time, the ground line 162 b is grounded via the external node 70. As a result, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. Therefore, when the ONU 100 is connected to the external node 70, signals cannot be transmitted / received between the first serial signal terminal 121 of the ONU function unit 120 and the first serial IF unit 142.
  • a test device used for manufacturing or maintaining the ONU 100 can be configured to apply a predetermined voltage to the ground line 162b when the ONU 100 is connected.
  • FIG. 3 shows a state in which the ONU 100 is connected to the test equipment configured as described above.
  • the signal lines 160a and 160b are I2C signal lines like the signal lines 161a and 161b
  • the signal line 160a is a signal line for serial data transmission
  • the signal line 160b is a signal line for clock transmission.
  • the signal lines 160a and 160b may be either signal lines that are used only when test equipment is connected, or signal lines that are used for other purposes during normal operation.
  • the signal lines 160a and 160b are signal lines that are used only when a test device is connected.
  • the signal lines 160a ′ and 160b ′ are electrically connected to a predetermined processing unit 190 during normal operation, and are used for other purposes. ing.
  • a rate control signal, a LOS (Loss of Signal) signal, or the like may be transmitted from the predetermined processing unit 190 to the first serial IF unit 142 during normal operation, for example, using a GPIO signal.
  • the signal lines 160a ′ and 160b ′ are switched to the connection between the ONU function unit 120 and the first serial IF unit 142 by the switch circuits 170a ′ and 170b ′.
  • the function of the processing unit 190 can also be realized by the ONU function unit 120 and the serial / parallel conversion unit 130.
  • the test device 180 shown in FIG. 3A includes an applied voltage unit 181 and a serial signal input / output unit 182.
  • the ground line 162b is connected to the applied voltage unit 181 through the power supply IF unit 144 and a predetermined voltage is applied, and the signal line 160a is connected to the serial signal input / output unit 182.
  • the switch circuits 170a and 170b are switched to the energized state by detecting that a predetermined voltage is applied to the ground line 162b.
  • the serial signal input / output unit 182 can access the ONU function unit 120 via the signal line 160a, and inputs operation information of the ONU function unit 120 or outputs a predetermined set value to output the ONU function unit 120. Can be set. The same switching is performed when the ONU 100 ′ shown in FIG. 3B is connected to the test equipment 180.
  • the signal lines 160 a and 160 b and the switch circuits 170 a and 170 b are provided between the first serial signal terminal 121 of the ONU function unit 120 and the interface module 140, and the external node 70.
  • the switch circuits 170a and 170b are shut off so that the first serial IF unit 142 cannot access the ONU function unit 120.
  • the ONU function unit 120 can be accessed in an energized state. As a result, security during normal operation is enhanced, and operation information of the ONU 100 can be read and set during the manufacture or maintenance of the ONU 100.
  • FIG. 4 is a block diagram showing the configuration of the ONU 200 according to the second embodiment.
  • the interface module 240 includes a main signal IF unit 241, a first serial IF unit 242, and a power feeding IF unit 244, but does not include a second serial IF unit.
  • the ONU 200 includes other switch circuits 270a and 270b instead of the switch circuits 170a and 170b.
  • the switch circuits 270a and 270b are connected by switching from the first serial IF unit 242 to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110. It is controlled so that Each of the switch circuits 270a and 270b has three contacts, and each contact is connected to the first serial IF unit 242, the first serial signal terminal 121, and the second serial signal terminal 111, respectively. Each signal line is connected.
  • the signal line 263a from the first serial IF unit 242 is connected to the contact 271a of the switch circuit 270a, the signal line 260a from the first serial signal terminal 121 is connected to the contact 272a, and further to the contact 273a.
  • a signal line 261a from the second serial signal terminal 111 is connected.
  • the signal line 263b from the first serial IF unit 242 is connected to the contact point 271b of the switch circuit 270b
  • the signal line 260b from the first serial signal terminal 121 is connected to the contact point 272b, and the contact point 273b. Is connected to the signal line 261b from the second serial signal terminal 111.
  • the signal lines 263a, 263b, 260a, 260b, 261a, 261b connected to the first serial IF unit 242 directly or via the switch circuits 270a, 270b are all configured by I2C.
  • the switch circuits 270a and 270b branch and connect the ground line 262b to input a control signal, and the switching control of the switch circuits 270a and 270b is performed using the voltage applied to the ground line 262b as a control signal. Is done.
  • the switch circuits 270a and 270b connect the contacts 271a and 273a and the contacts 271b and 273b, respectively. That is, during normal operation connected to the external node 70, the first serial IF unit 242 is connected to the second serial signal terminal 111 of the electrical / optical conversion unit 110.
  • the ONU 200 when the ONU 200 is connected to a test device 180 used at the time of manufacture or maintenance, a predetermined voltage is applied from the applied voltage unit 181 of the test device 180 to the ground line 262b. Is applied.
  • the switch circuits 270a and 270b are switched to connect the contacts 271a and 272a and the contacts 271b and 272b, respectively, when a predetermined voltage is applied to the ground line 262b.
  • the first serial signal terminal 121 and the first serial IF unit 242 are connected, and the ONU function unit 120 can be accessed from the serial signal input / output unit 182 of the test equipment.
  • the first serial IF unit 242 is switched and connected to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110.
  • the ONU function unit 120 is accessed via the first serial IF unit 242 only when connected to the test equipment 180 used during manufacturing or maintenance. It is possible. Thereby, it becomes possible to read out and set the operation information of the ONU 200 at the time of manufacturing and maintenance, and the work such as maintenance can be made much more efficient.
  • the switch circuits 270a and 270b When connected to the external node 70, the switch circuits 270a and 270b are switched to connect the first serial IF unit 242 to the second serial signal terminal 111 of the electrical / optical conversion unit 110. Therefore, security is enhanced by preventing access to the ONU function unit 120.
  • FIG. 5 is a block diagram showing a configuration of the ONU 300 according to the third embodiment.
  • the interface module 340 is configured to include a main signal IF unit 341, a first serial IF unit 342, and a power feeding IF unit 344.
  • the switch circuit is not used.
  • the ONU function unit 120 and the electrical / optical conversion unit 110 are connected in parallel to the I2C buses 363 a and 363 b, and the first serial signal terminal 121 of the ONU function unit 120 is connected from the first serial IF unit 342.
  • the second serial signal terminal 111 of the electrical / optical converter 110 is always connected via the I2C buses 363a and 363b.
  • the ONU function unit 120 is connected to the first serial IF unit 342 from the first serial signal terminal 121 via the I2C buses 363a and 363b, and branches and inputs a control signal from the ground line 362b. Yes.
  • the ONU function unit 120 includes a connection line switching unit, uses the voltage applied to the ground line 362b as a control signal, and determines whether the predetermined voltage is applied to the ground line 362b. It is determined whether or not access from one serial IF unit 342 is permitted.
  • the ONU function unit 120 When the ONU 300 is connected to the MSA interface slot of the external node 70 and is normally operated, the ground line 262b is grounded via the external node 70. In this case, since a predetermined voltage is not applied to the ground line 362b, the ONU function unit 120 does not permit access from the first serial IF unit 342. On the other hand, when the ONU 300 is connected to a test device used during manufacturing or maintenance, a predetermined voltage is applied from the test device to the ground line 362b. When the ONU function unit 120 detects that a predetermined voltage is applied to the ground line 362b, the ONU function unit 120 permits access from the first serial IF unit 342.
  • the ONU 300 is configured such that the ONU function unit 120 can be accessed via the first serial IF unit 342 only when connected to a test device used during manufacturing or maintenance. Sometimes, it becomes possible to read and set the operation information of the ONU 300, and the work such as maintenance can be made much more efficient.
  • the ONU function unit 120 detects this, whereby the first serial IF Access to the ONU function unit 120 from the unit 342 may not be permitted. This prevents the ONU function unit from being accessed illegally and enhances security.
  • the electrical / optical conversion unit 110 connected to the I2C buses 363a and 363b can always transmit signals between the second serial signal terminal 111 and the first serial IF unit 342.
  • the description in the present embodiment shows an example of the subscriber premises optical line termination device according to the present invention, and the present invention is not limited to this.
  • the detailed configuration and detailed operation of the subscriber premises optical line terminating device in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

Abstract

In an ONU (100), a first serial signal terminal (121) of an ONU functional block (120) is connected through switch circuits (170a, 170b) to a first serial IF block (142). A ground wire (162b) is branched so as to be connected to the switch circuits (170a, 170b). A voltage applied to the ground wire (162b) is used as a control signal. When the ground wire (162b) is connected to ground, the switch circuits (170a, 170b) are cut off, so that an access from the first serial IF block (142) is not permitted. When a predetermined voltage is applied to the ground wire (162b), the switch circuits (170a, 170b) are energized, so that an access from the first serial IF block (142) is permitted.

Description

加入者宅側光回線終端装置Subscriber premises optical line termination equipment
　本発明は、ＰＯＮ型の光伝送システムにおいて加入者宅に設置される加入者宅側光回線終端装置に関する。 The present invention relates to a subscriber premises optical line terminator installed in a subscriber premises in a PON type optical transmission system.
　ＦＴＴＨ、ＣＡＴＶ等の光ネットワークでは、下記の特許文献１に記載されているように、センタに接続される光伝送路を受動型スプリッタにより分岐して複数の加入者宅まで光伝送路を敷設するＰＯＮ(Passive Optical Network)型の光伝送システムが使用されている。このような光伝送システムは、ＰＤＳ(Passive Double Star)とも呼ばれる。 In an optical network such as FTTH and CATV, as described in Patent Document 1 below, an optical transmission path connected to a center is branched by a passive splitter, and an optical transmission path is laid to a plurality of subscriber homes. A PON (Passive-Optical-Network) type optical transmission system is used. Such an optical transmission system is also called PDS (Passive Double Double Star).
　ＰＯＮ型の光伝送システムでは、図６に示すように、センタの光回線終端装置（ＯＬＴ：Optical Line Termination）９０１が光ファイバ９０２を介してスプリッタ９０３の合波端に接続され、スプリッタ９０３の複数の分波端には光ファイバ９０４－１、…９０４－ｎを介して各加入者宅に設置された光回線終端装置（ＯＮＵ：Optical Network Unit）９０５－１、…９０５－ｎが接続される。 In the PON type optical transmission system, as shown in FIG. 6, a center optical line termination device (OLT: Optical Line Termination) 901 is connected to a multiplexing end of a splitter 903 via an optical fiber 902, and a plurality of splitters 903 are connected. Are connected to optical line terminators (ONU: Optical Network Units) 905-1,... 905-n installed at each subscriber's home via optical fibers 904-1,. .
　ＯＮＵ９０５－１、…９０５－ｎの構成を図7に示す。同図は、一例としてＯＮＵ９０５－１の構成を示しており、ＯＮＵ９０５－１は、光トランシーバ部９０６、ＯＮＵ機能部９０７、及びイーサネット（登録商標）インタフェース９０８を備える構成となっている。スプリッタ９０３に接続された光ファイバ９０４－１が、各加入者宅に設けられた光成端ユニット９０９を介して光トランシーバ部９０６に接続されている。 The configuration of ONU905-1,... 905-n is shown in FIG. This figure shows the configuration of the ONU 905-1 as an example, and the ONU 905-1 includes an optical transceiver unit 906, an ONU function unit 907, and an Ethernet (registered trademark) interface 908. An optical fiber 904-1 connected to the splitter 903 is connected to the optical transceiver unit 906 via an optical termination unit 909 provided in each subscriber's house.
　イーサネット（登録商標）インタフェース９０８として、１０／１００／１０００ＢＡＳＥ－ＴＸ等を用いることができ、これに例えばＬＡＮケーブル９１０が接続される。ＬＡＮケーブル９１０には、コンピュータやプリンタ等の端末機器９１４を直接接続することができ、またルータ９１２やスイッチングハブ９１３等のスイッチを接続し、これに別の端末機器９１４を接続することもできる。
特開平９－２１４５４１号公報 As the Ethernet (registered trademark) interface 908, 10/100 / 1000BASE-TX or the like can be used, and for example, a LAN cable 910 is connected thereto. A terminal device 914 such as a computer or a printer can be directly connected to the LAN cable 910, or a switch such as a router 912 or a switching hub 913 can be connected to another terminal device 914.
JP-A-9-214541
ＰＯＮ型の光伝送システムにおいて通信異常等があった場合、現状ではＯＮＵの動作情報の全てを読み出す手段が設けられていないため、ＯＮＵ内部のどこで不具合が発生しているかを容易に知ることができなかった。また、ＯＮＵの製造時や保守時等においても、ＯＮＵの動作情報を読み出す手段が無いために、ＯＮＵの評価試験等に多大の時間を要するといった問題があった。
さらには、ＯＮＵの小型化が進んでおり、製造時や保守時等におけるＯＮＵの動作情報を読み出す手段を実装するスペースも問題となっていた。 If there is a communication error in the PON type optical transmission system, there is no means for reading all the ONU operation information at present, so it is easy to know where the malfunction occurs in the ONU. There wasn't. In addition, there is a problem that it takes a lot of time for the ONU evaluation test and the like because there is no means for reading the ONU operation information during the manufacture or maintenance of the ONU.
Furthermore, downsizing of ONUs has progressed, and space for mounting means for reading ONU operation information at the time of manufacture or maintenance has also been a problem.
そこで、本発明はこのような問題を解決するためになされたものであり、シリアルインタフェースを用いて動作情報の読み出しおよび設定が可能な加入者宅側光回線終端装置を提供することを目的とする。 Accordingly, the present invention has been made to solve such problems, and an object of the present invention is to provide a subscriber premises optical line terminator capable of reading and setting operation information using a serial interface. .
　本発明の加入者宅側光回線終端装置の第１の態様は、センタ側光回線終端装置と光伝送路で接続され、外部ノードとは信号線で接続されて終端処理を行う加入者宅側光回線終端装置であって、前記センタ側光回線終端装置に接続されて主信号の光電気変換及び逆光電気変換を行う電気／光変換部と、前記電気／光変換部に接続されて前記主信号の終端処理を行う光回線終端装置機能部と、前記光回線終端装置機能部に接続されて前記主信号のシリアル・パラレル変換及び逆シリアル・パラレル変換を行うシリアル／パラレル変換部と、前記シリアル／パラレル変換部に接続されて前記外部ノードとの間で前記主信号の入出力を行う主信号ＩＦ（インタフェース）部と、所定のシリアル信号を入出力する第１のシリアルＩＦ部と、電力供給を行うための給電線および接地線に接続される給電ＩＦ部とを有するインタフェースモジュールと、を備え、所定の条件が成立すると、前記光回線終端装置機能部に設けられた第１のシリアル信号端と前記第１のシリアルＩＦ部とが電気的に接続されることを特徴とする。 The first aspect of the subscriber premises optical line terminator according to the present invention is connected to the center side optic line terminator via an optical transmission line and connected to an external node via a signal line to perform termination processing. An optical line terminator, which is connected to the center side optical line terminator and performs photoelectric conversion and reverse photoelectric conversion of a main signal; and is connected to the electric / optical conversion unit and is connected to the main signal. An optical line terminator function unit that performs signal termination processing, a serial / parallel conversion unit that is connected to the optical line terminator function unit and performs serial / parallel conversion and inverse serial / parallel conversion of the main signal, and the serial A main signal IF (interface) unit that is connected to the parallel / parallel conversion unit and inputs / outputs the main signal to / from the external node, a first serial IF unit that inputs / outputs a predetermined serial signal, and power supply The And an interface module having a power supply IF unit connected to a power supply line and a ground line, and when a predetermined condition is satisfied, a first serial signal terminal provided in the optical line terminator function unit; The first serial IF unit is electrically connected.
本発明の加入者宅側光回線終端装置の他の態様は、前記所定の条件は、前記接地線に所定の電圧が印加されると成立し、前記所定の条件が成立しないときは前記第１のシリアル信号端と前記第１のシリアルＩＦ部とが電気的に遮断されていることを特徴とする。 In another aspect of the customer premises optical line terminator according to the present invention, the predetermined condition is satisfied when a predetermined voltage is applied to the ground line, and the first condition is satisfied when the predetermined condition is not satisfied. The serial signal terminal and the first serial IF section are electrically cut off.
本発明の加入者宅側光回線終端装置の他の態様は、前記所定の条件が成立すると、前記第１のシリアル信号端と前記第１のシリアルＩＦ部との間を電気的に接続する切替手段をさらに備えることを特徴とする。 According to another aspect of the subscriber premises optical line termination device of the present invention, when the predetermined condition is satisfied, switching is performed to electrically connect the first serial signal terminal and the first serial IF unit. The apparatus further comprises means.
本発明の加入者宅側光回線終端装置の他の態様は、前記切替手段は、前記所定の条件が成立しているときに前記第１のシリアルＩＦ部と前記第１のシリアル信号端とを電気的に接続し、それ以外のときは前記第１のシリアルＩＦ部と前記第１のシリアル信号端との間を電気的に遮断するスイッチ回路であることを特徴とする。 According to another aspect of the subscriber premises optical line termination device of the present invention, the switching means connects the first serial IF unit and the first serial signal terminal when the predetermined condition is satisfied. It is a switch circuit that is electrically connected and otherwise electrically cuts off between the first serial IF section and the first serial signal terminal.
本発明の加入者宅側光回線終端装置の他の態様は、前記スイッチ回路は、前記所定の条件が成立していないときは、前記第１のシリアルＩＦ部と前記電気／光変換部に設けられた第２のシリアル信号端とを電気的に接続することを特徴とする。 In another aspect of the subscriber premises optical line termination device of the present invention, the switch circuit is provided in the first serial IF unit and the electrical / optical conversion unit when the predetermined condition is not satisfied. The second serial signal terminal is electrically connected.
本発明の加入者宅側光回線終端装置の他の態様は、前記インタフェースモジュールは、第２のシリアルＩＦ部をさらに有し、前記第２のシリアルＩＦ部は前記電気／光変換部に設けられた第２のシリアル信号端に接続されることを特徴とする。 In another aspect of the subscriber-side optical line termination device of the present invention, the interface module further includes a second serial IF unit, and the second serial IF unit is provided in the electrical / optical conversion unit. Further, the second serial signal terminal is connected.
本発明の加入者宅側光回線終端装置の他の態様は、前記第１のシリアル信号端および前記電気／光変換部に設けられた第２のシリアル信号端が前記第１のシリアルＩＦ部にバス接続され、前記切替手段は、前記所定の条件が成立していると判定すると、前記第１のシリアルＩＦ部から前記第１のシリアル信号端を介して前記光回線終端装置機能部へのアクセスを許可することを特徴とする。 In another aspect of the subscriber premises optical line terminator of the present invention, the first serial signal end and the second serial signal end provided in the electrical / optical conversion unit are connected to the first serial IF unit. When the bus is connected and the switching means determines that the predetermined condition is satisfied, the access from the first serial IF section to the optical line terminator function section via the first serial signal end It is characterized by permitting.
本発明の加入者宅側光回線終端装置の他の態様は、前記第１のシリアル信号端と前記第１のシリアルＩＦ部との間がＩ２Ｃで接続されることを特徴とする。 In another aspect of the subscriber premises optical line terminator of the present invention, the first serial signal terminal and the first serial IF unit are connected by I2C.
本発明の加入者宅側光回線終端装置の他の態様は、前記第２のシリアル信号端と前記第１のシリアルＩＦ部との間がＩ２Ｃで接続されることを特徴とする。 According to another aspect of the subscriber premises optical line termination device of the present invention, the second serial signal terminal and the first serial IF unit are connected by I2C.
　本発明によれば、シリアルインタフェースを切替えて使用可能とすることにより、動作情報の読み出しおよび設定が可能な加入者宅側光回線終端装置を提供することが可能となる。 According to the present invention, it is possible to provide a subscriber premises optical line terminating device capable of reading and setting operation information by switching the serial interface to be usable.
本発明の第１の実施形態に係る加入者宅側光回線終端装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the subscriber premises optical line termination | terminus apparatus which concerns on the 1st Embodiment of this invention. 本実施形態の加入者宅側光回線終端装置が用いられたＰＯＮ型光伝送システムの一例を示す構成図である。It is a block diagram which shows an example of the PON type | mold optical transmission system in which the subscriber premises optical line termination apparatus of this embodiment was used. 本実施形態の加入者宅側光回線終端装置が試験用機器に接続された状態を示すブロック図である。It is a block diagram which shows the state by which the subscriber optical fiber terminal device of this embodiment was connected to the test equipment. 本発明の第２の実施形態に係る加入者宅側光回線終端装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the subscriber premises optical line termination | terminus apparatus which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施形態に係る加入者宅側光回線終端装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the subscriber premises optical line termination | terminus apparatus which concerns on the 3rd Embodiment of this invention. 従来の光伝送システムを示す構成図である。It is a block diagram which shows the conventional optical transmission system. 従来の光伝送システムの加入者宅側光回線終端装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the subscriber optical fiber terminal device of the conventional optical transmission system.
符号の説明Explanation of symbols
１、２　　光伝送システム
１０　　　ＰＯＮインタフェースカード
１１、９０１　　ＯＬＴ
１２　　　認証機能部
２０、４０、９０２、９０４　　光ファイバ
３０、９０３　　光カプラ
５０　　　ＯＮＵ
７０　　　外部ノード
８０、９１４　　端末機器
１００、２００、３００、９０５　　加入者宅側光回線終端装置
１１０　　電気／光変換部
１１１　　第２のシリアル信号端
１２０，９０７　　ＯＮＵ機能部
１２１　　第１のシリアル信号端
１３０　　シリアル／パラレル変換部
１４０、２４０、３４０　　インタフェースモジュール
１４１、２４１、３４１　　主信号ＩＦ部
１４２、２４２、３４２　　第１のシリアルＩＦ部
１４３　　第２のシリアルＩＦ部
１４４、２４４、３４４　　給電ＩＦ部
１５０ａ、１５０ｂ　　第１のシリアル伝送路
１５１ａ、１５１ｂ　　パラレル伝送路
１５２ａ、１５２ｂ　　第２のシリアル伝送路
１７０ａ、１７０ｂ、２７０ａ、２７０ｂ　　スイッチ回路
１８０　　試験用機器
１８１　　加電圧部
１８２　　シリアル信号入出力部
１９０　　処理部 1, 2 Optical transmission system 10 PON interface card 11, 901 OLT
12 Authentication function unit 20, 40, 902, 904 Optical fiber 30, 903 Optical coupler 50 ONU
70 External node 80, 914 Terminal equipment 100, 200, 300, 905 Subscriber premises side optical line terminator 110 Electrical / optical converter 111 Second serial signal terminal 120, 907 ONU function part 121 First serial signal terminal 130 Serial / parallel converters 140, 240, 340 Interface modules 141, 241, 341 Main signal IF units 142, 242, 342 First serial IF unit 143 Second serial IF units 144, 244, 344 Power supply IF units 150a, 150b First serial transmission path 151a, 151b Parallel transmission path 152a, 152b Second serial transmission path 170a, 170b, 270a, 270b Switch circuit 180 Test equipment 181 Applied voltage unit 182 Serial signal input / output unit 190 Processing unit
　（第１の実施形態）
図面を参照して本発明の好ましい実施の形態における加入者宅側光回線終端装置の構成について詳細に説明する。本発明の第１の実施の形態に係る加入者宅側光回線終端装置（ＯＮＵ）の構成を示すブロック図を図１に示す。また、図１に示す本実施形態のＯＮＵ１００を用いて構成されたＰＯＮ型光伝送システムの一例を図２に示す。 (First embodiment)
With reference to the drawings, a detailed description will be given of the configuration of a subscriber premises optical line terminating device in a preferred embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of a subscriber premises optical line termination unit (ONU) according to the first embodiment of the present invention. FIG. 2 shows an example of a PON type optical transmission system configured using the ONU 100 of this embodiment shown in FIG.
図２のＰＯＮ型光伝送システム１において、センタに設けられるＰＯＮインタフェースカード１０は、光回線終端装置（ＯＬＴ）１１と認証機能部１２とを有しており、ＯＬＴ１１の光入出力端に光伝送路である光ファイバ２０の一端が接続されている。また、光カプラ（光合分波部）３０は、１つの合波端と２つ以上の分波端とを有しており、合波端にはＯＬＴ１１に接続された光ファイバ２０の他端が接続されている。 In the PON type optical transmission system 1 of FIG. 2, the PON interface card 10 provided in the center has an optical line terminator (OLT) 11 and an authentication function unit 12, and performs optical transmission to the optical input / output terminal of the OLT 11. One end of the optical fiber 20 that is a path is connected. The optical coupler (optical multiplexing / demultiplexing unit) 30 has one multiplexing end and two or more demultiplexing ends. The other end of the optical fiber 20 connected to the OLT 11 is connected to the multiplexing end. It is connected.
光カプラ３０の分波端には、複数の光ファイバ４０－１、…、４０－ｎ（ｎ：自然数、以下では４０－１～ｎと記す）のそれぞれの一端が接続され、それぞれの他端にはＯＮＵ５０－１～ｎが接続されている。このような構成により、ＯＬＴ１１からの下り信号が光カプラ３０で分波されてＯＮＵ５０－１～ｎのそれぞれに伝送される一方、ＯＮＵ５０－１～ｎのそれぞれから伝送される光信号が光カプラ３０で合波されてＯＬＴ１１に伝送される。 One end of each of a plurality of optical fibers 40-1,..., 40-n (n: natural number, hereinafter referred to as 40-1 to n) is connected to the demultiplexing end of the optical coupler 30, and the other end Are connected to ONUs 50-1 to 50-n. With such a configuration, the downstream signal from the OLT 11 is demultiplexed by the optical coupler 30 and transmitted to each of the ONUs 50-1 to 50-n, while the optical signal transmitted from each of the ONUs 50-1 to 50-n is transmitted to the optical coupler 30. Are combined and transmitted to the OLT 11.
ＯＮＵ５０－１～ｎは、それぞれが加入者宅毎に設置され、これにパーソナルコンピュータやスイッチ等の外部ノード７０が接続される。図２では、外部ノード７０をスイッチとしており、スイッチに備えられた複数のポート７０ａには複数の端末機器８０が接続されている。外部ノード７０に用いられるスイッチには、Ｌ２スイッチ、Ｌ３スイッチ、ルータ等がある。このような構成により、ＯＮＵ１００を介してセンタのＯＬＴ１１に複数の端末機器８０を接続することができる。 Each of the ONUs 50-1 to 50-n is installed in each subscriber's house, and an external node 70 such as a personal computer or a switch is connected to the ONUs. In FIG. 2, the external node 70 is a switch, and a plurality of terminal devices 80 are connected to a plurality of ports 70a provided in the switch. Examples of the switch used for the external node 70 include an L2 switch, an L3 switch, and a router. With such a configuration, a plurality of terminal devices 80 can be connected to the center OLT 11 via the ONU 100.
　ＯＬＴ１１及びＯＮＵ５０－１～ｎには、ＧＰＯＮ(Gigabit Passive Optical Networkの略称であり、ＩＴＵ規格G.984.xに準拠した方式)、ＧＥＰＯＮ(Gigabit Ethernet(登録商標) PONの略であり、ＩＥＥＥ８０２．３ａｈ規格に準拠した方式)の規定に適合した装置が使用される。 The OLT 11 and ONUs 50-1 to 50-n are GPON (abbreviation for Gigabit Passive Optical Network, compliant with ITU standard G.984.x), GEPON (Gigabit Ethernet (registered trademark) PON), and IEEE802. A device that conforms to the 3) standard) is used.
本実施形態のＯＮＵ１００は、図２に示したＯＮＵ５０－１～ｎに用いることができる。以下では、一例としてＯＮＵ５０－１にＯＮＵ１００が用いられているものとする。本実施形態のＯＮＵ１００は、図１に示すように、電気／光変換部（ＴＲｘ）１１０と光回線終端装置機能部（以下ではＯＮＵ機能部と記す）１２０とシリアル／パラレル変換部（ＳＥＲＤＥＳ）１３０とインタフェースモジュール１４０とを備えている。 The ONU 100 of the present embodiment can be used for the ONUs 50-1 to 50-n shown in FIG. In the following, it is assumed that the ONU 100 is used as the ONU 50-1. As shown in FIG. 1, the ONU 100 of this embodiment includes an electrical / optical converter (TRx) 110, an optical line terminator function unit (hereinafter referred to as an ONU function unit) 120, and a serial / parallel converter (SERDES) 130. And an interface module 140.
主信号を伝送する信号線として、電気／光変換部１１０とＯＮＵ機能部１２０との間は、シリアルな電気信号を伝送する第１のシリアル伝送路１５０ａ（下り信号線）、１５０ｂ（上り信号線）で接続されている。また、ＯＮＵ機能部１２０とシリアル／パラレル変換部１３０との間は、パラレルな電気信号を伝送するパラレル伝送路１５１ａ（下り信号線）、１５１ｂ（上り信号線）で接続されている。パラレル伝送路１５１ａ、１５１ｂを伝送するパラレル信号は、例えば１０ビットの信号とすることができる。さらに、シリアル／パラレル変換部１３０とインタフェースモジュール１４０との間は、シリアルな電気信号を伝送する第２のシリアル伝送路１５２ａ（下り信号線）、１５２ｂ（上り信号線）で接続されている。 As signal lines for transmitting main signals, first serial transmission lines 150a (downstream signal lines) and 150b (upstream signal lines) for transmitting serial electrical signals between the electrical / optical conversion section 110 and the ONU function section 120. ). The ONU function unit 120 and the serial / parallel conversion unit 130 are connected by parallel transmission paths 151a (downstream signal lines) and 151b (upstream signal lines) for transmitting parallel electric signals. The parallel signal transmitted through the parallel transmission paths 151a and 151b can be, for example, a 10-bit signal. Further, the serial / parallel converter 130 and the interface module 140 are connected by second serial transmission lines 152a (downstream signal lines) and 152b (upstream signal lines) for transmitting serial electrical signals.
電気／光変換部１１０は、センタ側のＯＬＴ１１との間で光ファイバ４０を介して光信号を送受信するための光入出力端を有しており、センタのＯＬＴ１１から送信された主信号の光信号（下り信号）を電気信号に変換（光電気変換）している。この電気信号は、下り信号線である第１のシリアル伝送路１５０ａを介してＯＮＵ機能部１２０に出力される。また、電気／光変換部１１０は、ＯＮＵ機能部１２０から上り信号線である第１のシリアル伝送路１５０ｂを介して入力した主信号の電気信号を光信号に変換（逆光電気変換）している。この光信号は、光ファイバ４０を介してＯＬＴ１１に送信される。 The electrical / optical converter 110 has an optical input / output terminal for transmitting and receiving an optical signal to and from the center-side OLT 11 via the optical fiber 40, and the light of the main signal transmitted from the center OLT 11. The signal (downstream signal) is converted into an electrical signal (photoelectric conversion). This electrical signal is output to the ONU function unit 120 via the first serial transmission line 150a which is a downstream signal line. In addition, the electrical / optical conversion unit 110 converts the electrical signal of the main signal input from the ONU function unit 120 via the first serial transmission line 150b that is an upstream signal line into an optical signal (reverse photoelectric conversion). . This optical signal is transmitted to the OLT 11 via the optical fiber 40.
ＯＮＵ機能部１２０は、電気／光変換部１１０から入力したシリアル信号をパラレル信号に変換し、所定の終端処理を行った後にこの信号を下り信号線であるパラレル伝送路１５１ａを介してシリアル／パラレル変換部１３０に出力している。また、ＯＮＵ機能部１２０は、シリアル／パラレル変換部１３０から上り信号線であるパラレル伝送路１５１ｂを介して入力したパラレル信号を、所定の終端処理を行った後にシリアル信号に変換して電気／光変換部１１０に出力している。 The ONU function unit 120 converts the serial signal input from the electrical / optical conversion unit 110 into a parallel signal, performs a predetermined termination process, and then converts this signal to a serial / parallel via a parallel transmission path 151a that is a downstream signal line. The data is output to the conversion unit 130. The ONU function unit 120 converts the parallel signal input from the serial / parallel conversion unit 130 through the parallel transmission path 151b, which is an upstream signal line, into a serial signal after performing a predetermined termination process, thereby converting the electrical / optical The data is output to the conversion unit 110.
シリアル／パラレル変換部１３０は、図示しないシリアル／パラレル変換手段と逆シリアル／パラレル変換手段を備え、ＯＮＵ機能部１２０から入力したパラレル信号を逆シリアル／パラレル変換手段でシリアル信号に変換し、これを下り信号線である第２のシリアル伝送路１５２ａを介してインタフェースモジュール１４０に出力している。また、シリアル／パラレル変換部１３０は、インタフェースモジュール１４０から第２のシリアル伝送路１５２ｂを介して入力したシリアル信号をシリアル／パラレル変換手段でパラレル信号に変換してＯＮＵ機能部１２０に出力している。 The serial / parallel conversion unit 130 includes serial / parallel conversion means and reverse serial / parallel conversion means (not shown). The parallel signal input from the ONU function unit 120 is converted into a serial signal by the reverse serial / parallel conversion means. The data is output to the interface module 140 via the second serial transmission line 152a which is a downstream signal line. Further, the serial / parallel converter 130 converts the serial signal input from the interface module 140 via the second serial transmission path 152b into a parallel signal by the serial / parallel converter and outputs the parallel signal to the ONU function unit 120. .
インタフェースモジュール１４０は、外部ノード７０とシリアルな電気信号で接続するものである。本実施形態のＯＮＵ１００では、インタフェースモジュール１４０をＭＳＡ（Multi-Source Agreement）インタフェースの規格に対応させており、外部ノード７０に設けられたＭＳＡインタフェーススロット（図示せず）に直接接続することが可能な構成としている。ＭＳＡインタフェースの規格として、ＧＢＩＣ、ＳＦＰ等がある。 The interface module 140 is connected to the external node 70 by a serial electric signal. In the ONU 100 according to the present embodiment, the interface module 140 corresponds to the MSA (Multi-Source Agreement) interface standard, and can be directly connected to an MSA interface slot (not shown) provided in the external node 70. It is configured. Examples of MSA interface standards include GBIC and SFP.
インタフェースモジュール１４０は、主信号ＩＦ部１４１と、第１のシリアルＩＦ部１４２と、第２のシリアルＩＦ部１４３と、給電ＩＦ部１４４とを備えている。シリアル／パラレル変換部１３０に接続されて外部ノード７０との間で入出力する主信号を伝送するための第２のシリアル伝送路１５２ａ、１５２ｂは、主信号ＩＦ部１４１に接続されている。 The interface module 140 includes a main signal IF unit 141, a first serial IF unit 142, a second serial IF unit 143, and a power feeding IF unit 144. Second serial transmission lines 152 a and 152 b that are connected to the serial / parallel conversion unit 130 and transmit a main signal input / output to / from the external node 70 are connected to the main signal IF unit 141.
また、ＯＮＵ機能部１２０および電気／光変換部１１０は、それぞれ第１のシリアル信号端１２１及び第２のシリアル信号端１１１を備えており、それぞれが第１のシリアルＩＦ部１４２および第２のシリアルＩＦ部１４３に接続されている。第２のシリアル信号端１１１と第２のシリアルＩＦ部１４３との間の信号線１６１ａ、１６１ｂは、Ｉ２Ｃで構成されている。Ｉ２Ｃ（Ｉｎｔｅｒ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）信号線は、シリアルデータ伝送用の信号線１６１ａとクロック伝送用の信号線１６１ｂの２本の信号線で構成されている。 Further, the ONU function unit 120 and the electrical / optical conversion unit 110 include a first serial signal terminal 121 and a second serial signal terminal 111, respectively, and the first serial IF unit 142 and the second serial signal terminal 111, respectively. It is connected to the IF unit 143. The signal lines 161a and 161b between the second serial signal terminal 111 and the second serial IF unit 143 are configured by I2C. An I2C (Inter Integrated Circuit) signal line is composed of two signal lines, a serial data transmission signal line 161a and a clock transmission signal line 161b.
給電ＩＦ部１４４には、給電線１６２ａと接地線１６２ｂが接続されている。インタフェースモジュール１４０が外部ノード７０に接続されたとき、接地線１６２ｂが接地されるとともに、給電線１６２ａを経由して外部ノード７０からＯＮＵ１００に給電される。 A power supply line 162 a and a ground line 162 b are connected to the power supply IF unit 144. When the interface module 140 is connected to the external node 70, the ground line 162b is grounded, and power is supplied from the external node 70 to the ONU 100 via the power supply line 162a.
本実施形態のＯＮＵ１００では、ＯＮＵ機能部１２０の第１のシリアル信号端１２１にも信号線１６０ａ、１６０ｂが接続されており、これらの信号線の他端は第１のシリアルＩＦ部１４２に接続されている。また、信号線１６０ａ、１６０ｂの途中にスイッチ回路１７０ａ、１７０ｂが設けられている。スイッチ回路１７０ａ、１７０ｂとして、ここでは、リレーやスイッチ、ダイオードが用いられている。信号線１６０ａ、１６０ｂとして、信号線１６１ａ、１６１ｂと同様にＩ２Ｃ信号線を用いることができる。あるいは、ＯＮＵ機能部１２０のＧＰＩＯ端子（図示せず）に接続されたＧＰＩＯ信号線を用いてもよい。 In the ONU 100 of this embodiment, the signal lines 160 a and 160 b are also connected to the first serial signal terminal 121 of the ONU function unit 120, and the other ends of these signal lines are connected to the first serial IF unit 142. ing. In addition, switch circuits 170a and 170b are provided in the middle of the signal lines 160a and 160b. Here, relays, switches, and diodes are used as the switch circuits 170a and 170b. As the signal lines 160a and 160b, I2C signal lines can be used similarly to the signal lines 161a and 161b. Alternatively, a GPIO signal line connected to a GPIO terminal (not shown) of the ONU function unit 120 may be used.
スイッチ回路１７０ａ、１７０ｂは、制御用信号を入力するために接地線１６２ｂを分岐して接続しており、接地線１６２ｂに印加されている電圧を制御用信号として、信号線１６０ａ、１６０ｂを通電または遮断するように制御している。すなわち、接地線１６２ｂが接地されている場合にはスイッチ回路１７０ａ、１７０ｂが遮断状態となって信号線１６０ａ、１６０ｂが遮断される。これに対し、接地線１６２ｂに所定の電圧が印加されている場合には、スイッチ回路１７０ａ、１７０ｂが通電状態となって信号線１６０ａ、１６０ｂが通電可能となる。 The switch circuits 170a and 170b branch and connect the ground line 162b in order to input a control signal. The voltage applied to the ground line 162b is used as a control signal and the signal lines 160a and 160b are energized. It is controlled to shut off. That is, when the ground line 162b is grounded, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. On the other hand, when a predetermined voltage is applied to the ground line 162b, the switch circuits 170a and 170b are energized and the signal lines 160a and 160b can be energized.
ＯＮＵ１００の通常の運用においては、ＯＮＵ１００が外部ノード７０のＭＳＡインタフェーススロットに接続され、このとき接地線１６２ｂが外部ノード７０を介して接地される。その結果、スイッチ回路１７０ａ、１７０ｂが遮断状態となって信号線１６０ａ、１６０ｂが遮断される。従って、ＯＮＵ１００が外部ノード７０に接続されているときには、ＯＮＵ機能部１２０の第１のシリアル信号端１２１と第１のシリアルＩＦ部１４２との間で信号を送受信させることはできない。 In the normal operation of the ONU 100, the ONU 100 is connected to the MSA interface slot of the external node 70, and at this time, the ground line 162 b is grounded via the external node 70. As a result, the switch circuits 170a and 170b are cut off and the signal lines 160a and 160b are cut off. Therefore, when the ONU 100 is connected to the external node 70, signals cannot be transmitted / received between the first serial signal terminal 121 of the ONU function unit 120 and the first serial IF unit 142.
これに対し、ＯＮＵ１００の製造時や保守時などに用いられる試験用機器は、ＯＮＵ１００を接続したときに接地線１６２ｂに所定の電圧を印加するように構成することができる。このように構成された試験用機器にＯＮＵ１００を接続した状態を図３に示す。ここで、信号線１６０ａ、１６０ｂは、信号線１６１ａ、１６１ｂと同様にＩ２Ｃ信号線としており、信号線１６０ａをシリアルデータ伝送用の信号線、信号線１６０ｂをクロック伝送用の信号線としている。 On the other hand, a test device used for manufacturing or maintaining the ONU 100 can be configured to apply a predetermined voltage to the ground line 162b when the ONU 100 is connected. FIG. 3 shows a state in which the ONU 100 is connected to the test equipment configured as described above. Here, the signal lines 160a and 160b are I2C signal lines like the signal lines 161a and 161b, the signal line 160a is a signal line for serial data transmission, and the signal line 160b is a signal line for clock transmission.
なお、信号線１６０ａ、１６０ｂは、試験用機器が接続されたときだけ使用される信号線、あるいは通常の運用時は別の目的で使用されている信号線、のいずれであってもよい。図１および図３（ａ）に示すＯＮＵ１００では、信号線１６０ａ、１６０ｂを、試験用機器が接続されたときだけ使用される信号線としている。これに対し、図３（ｂ）に示すＯＮＵ１００’では、信号線１６０ａ’、１６０ｂ’は通常の運用時には、所定の処理部１９０と電気的に接続され、別の目的で使用するのに用いられている。 The signal lines 160a and 160b may be either signal lines that are used only when test equipment is connected, or signal lines that are used for other purposes during normal operation. In the ONU 100 shown in FIGS. 1 and 3A, the signal lines 160a and 160b are signal lines that are used only when a test device is connected. On the other hand, in the ONU 100 ′ shown in FIG. 3B, the signal lines 160a ′ and 160b ′ are electrically connected to a predetermined processing unit 190 during normal operation, and are used for other purposes. ing.
一例として、通常の運用時に所定の処理部１９０から第１のシリアルＩＦ部１４２へレートコントロール信号やＬＯＳ（Loss of Signal）信号等を、例えば、ＧＰＩＯ信号により伝送するものであってよい。ＯＮＵ１００’が試験用機器１８０に接続されると、信号線１６０ａ’、１６０ｂ’は、スイッチ回路１７０ａ’、１７０ｂ’により、ＯＮＵ機能部１２０と第１のシリアルＩＦ部１４２との接続に切替えられる。
また、処理部１９０の機能は、ＯＮＵ機能部１２０やシリアル／パラレル変換部１３０で実現することもできる。 As an example, a rate control signal, a LOS (Loss of Signal) signal, or the like may be transmitted from the predetermined processing unit 190 to the first serial IF unit 142 during normal operation, for example, using a GPIO signal. When the ONU 100 ′ is connected to the test apparatus 180, the signal lines 160a ′ and 160b ′ are switched to the connection between the ONU function unit 120 and the first serial IF unit 142 by the switch circuits 170a ′ and 170b ′.
The function of the processing unit 190 can also be realized by the ONU function unit 120 and the serial / parallel conversion unit 130.
図３（ａ）に示す試験用機器１８０は、加電圧部１８１とシリアル信号入出力部１８２とを備えている。試験用機器１８０にＯＮＵ１００が接続されると、給電ＩＦ部１４４を介して接地線１６２ｂが加電圧部１８１に接続されて所定の電圧が印加されるとともに、信号線１６０ａがシリアル信号入出力部１８２に接続される。このとき、スイッチ回路１７０ａ、１７０ｂは、接地線１６２ｂが所定の電圧を印加されていることを検知して通電状態に切り替えられる。その結果、シリアル信号入出力部１８２は、信号線１６０ａを介してＯＮＵ機能部１２０にアクセス可能となり、ＯＮＵ機能部１２０の動作情報を入力したり、所定の設定値を出力してＯＮＵ機能部１２０を設定することが可能となる。図３（ｂ）に示すＯＮＵ１００’を試験用機器１８０に接続したときも同様の切替が行われる。 The test device 180 shown in FIG. 3A includes an applied voltage unit 181 and a serial signal input / output unit 182. When the ONU 100 is connected to the test device 180, the ground line 162b is connected to the applied voltage unit 181 through the power supply IF unit 144 and a predetermined voltage is applied, and the signal line 160a is connected to the serial signal input / output unit 182. Connected to. At this time, the switch circuits 170a and 170b are switched to the energized state by detecting that a predetermined voltage is applied to the ground line 162b. As a result, the serial signal input / output unit 182 can access the ONU function unit 120 via the signal line 160a, and inputs operation information of the ONU function unit 120 or outputs a predetermined set value to output the ONU function unit 120. Can be set. The same switching is performed when the ONU 100 ′ shown in FIG. 3B is connected to the test equipment 180.
上記説明のように、本実施形態のＯＮＵ１００では、ＯＮＵ機能部１２０の第１のシリアル信号端１２１とインタフェースモジュール１４０との間に信号線１６０ａ、１６０ｂとスイッチ回路１７０ａ、１７０ｂを設け、外部ノード７０に接続されたときはスイッチ回路１７０ａ、１７０ｂを遮断して第１のシリアルＩＦ部１４２からＯＮＵ機能部１２０にアクセスできないようにする一方、試験用機器１８０に接続されたときにはスイッチ回路１７０ａ、１７０ｂを通電状態にしてＯＮＵ機能部１２０にアクセスできるようにしている。これにより、通常運用時のセキュリティが高められるとともに、ＯＮＵ１００の製造時や保守時などでは、ＯＮＵ１００の動作情報の読み出しおよび設定を行うことが可能となる。 As described above, in the ONU 100 of the present embodiment, the signal lines 160 a and 160 b and the switch circuits 170 a and 170 b are provided between the first serial signal terminal 121 of the ONU function unit 120 and the interface module 140, and the external node 70. When connected to the test equipment 180, the switch circuits 170a and 170b are shut off so that the first serial IF unit 142 cannot access the ONU function unit 120. The ONU function unit 120 can be accessed in an energized state. As a result, security during normal operation is enhanced, and operation information of the ONU 100 can be read and set during the manufacture or maintenance of the ONU 100.
本発明の第２の実施の形態に係るＯＮＵの構成を、図４を用いて説明する。図４は、第２の実施の形態に係るＯＮＵ２００の構成を示すブロック図である。本実施形態のＯＮＵ２００では、インタフェースモジュール２４０が主信号ＩＦ部２４１と、第１のシリアルＩＦ部２４２と、給電ＩＦ部２４４とを有しており、第２のシリアルＩＦ部は有していない。 The configuration of the ONU according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing the configuration of the ONU 200 according to the second embodiment. In the ONU 200 of the present embodiment, the interface module 240 includes a main signal IF unit 241, a first serial IF unit 242, and a power feeding IF unit 244, but does not include a second serial IF unit.
また、ＯＮＵ２００は、スイッチ回路１７０ａ、１７０ｂに代えて、別のスイッチ回路２７０ａ、２７０ｂを備えている。スイッチ回路２７０ａ、２７０ｂは、第１のシリアルＩＦ部２４２からＯＮＵ機能部１２０の第１のシリアル信号端１２１または電気／光変換部１１０の第２のシリアル信号端１１１のいずれかに切り替えて接続されるように制御される。スイッチ回路２７０ａ、２７０ｂは、それぞれ３つの接点を有しており、各接点に第１のシリアルＩＦ部２４２、第１のシリアル信号端１２１、及び第２のシリアル信号端１１１のそれぞれに接続された各信号線が接続されている。 The ONU 200 includes other switch circuits 270a and 270b instead of the switch circuits 170a and 170b. The switch circuits 270a and 270b are connected by switching from the first serial IF unit 242 to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110. It is controlled so that Each of the switch circuits 270a and 270b has three contacts, and each contact is connected to the first serial IF unit 242, the first serial signal terminal 121, and the second serial signal terminal 111, respectively. Each signal line is connected.
図４では、スイッチ回路２７０ａの接点２７１ａに第１のシリアルＩＦ部２４２からの信号線２６３ａが接続され、接点２７２ａに第１のシリアル信号端１２１からの信号線２６０ａが接続され、さらに接点２７３ａに第２のシリアル信号端１１１からの信号線２６１ａが接続されている。同様に、スイッチ回路２７０ｂの接点２７１ｂには第１のシリアルＩＦ部２４２からの信号線２６３ｂが接続され、接点２７２ｂには第１のシリアル信号端１２１からの信号線２６０ｂが接続され、さらに接点２７３ｂには第２のシリアル信号端１１１からの信号線２６１ｂが接続されている。 In FIG. 4, the signal line 263a from the first serial IF unit 242 is connected to the contact 271a of the switch circuit 270a, the signal line 260a from the first serial signal terminal 121 is connected to the contact 272a, and further to the contact 273a. A signal line 261a from the second serial signal terminal 111 is connected. Similarly, the signal line 263b from the first serial IF unit 242 is connected to the contact point 271b of the switch circuit 270b, the signal line 260b from the first serial signal terminal 121 is connected to the contact point 272b, and the contact point 273b. Is connected to the signal line 261b from the second serial signal terminal 111.
本実施形態では、第１のシリアルＩＦ部２４２に直接またはスイッチ回路２７０ａ、２７０ｂを介して接続される信号線２６３ａ、２６３ｂ、２６０ａ、２６０ｂ、２６１ａ、２６１ｂは、すべてＩ２Ｃで構成されている。スイッチ回路２７０ａ、２７０ｂは、制御用信号を入力するために接地線２６２ｂを分岐して接続しており、接地線２６２ｂに印加されている電圧を制御用信号として、スイッチ回路２７０ａ、２７０ｂの切り替え制御が行われる。 In the present embodiment, the signal lines 263a, 263b, 260a, 260b, 261a, 261b connected to the first serial IF unit 242 directly or via the switch circuits 270a, 270b are all configured by I2C. The switch circuits 270a and 270b branch and connect the ground line 262b to input a control signal, and the switching control of the switch circuits 270a and 270b is performed using the voltage applied to the ground line 262b as a control signal. Is done.
ＯＮＵ２００が外部ノード７０のＭＳＡインタフェーススロットに接続されて運用される通常時は、接地線２６２ｂが外部ノード７０を介して接地される。この場合には、スイッチ回路２７０ａ、２７０ｂは、接点２７１ａと２７３ａ、および接点２７１ｂと２７３ｂのそれぞれを接続する。すなわち、外部ノード７０に接続された通常運用時は、第１のシリアルＩＦ部２４２が電気／光変換部１１０の第２のシリアル信号端１１１に接続されている。 During normal operation when the ONU 200 is connected to the MSA interface slot of the external node 70, the ground line 262b is grounded via the external node 70. In this case, the switch circuits 270a and 270b connect the contacts 271a and 273a and the contacts 271b and 273b, respectively. That is, during normal operation connected to the external node 70, the first serial IF unit 242 is connected to the second serial signal terminal 111 of the electrical / optical conversion unit 110.
これに対し、図４に示すように、ＯＮＵ２００が製造時や保守時などに用いられる試験用機器１８０に接続されている場合には、試験用機器１８０の加電圧部１８１から接地線２６２ｂに所定の電圧が印加される。スイッチ回路２７０ａ、２７０ｂは、接地線２６２ｂに所定の電圧が印加されていると、接点２７１ａと２７２ａ、および接点２７１ｂと２７２ｂのそれぞれを接続するように切り替わる。その結果、第１のシリアル信号端１２１と第１のシリアルＩＦ部２４２とが接続され、試験用機器のシリアル信号入出力部１８２からＯＮＵ機能部１２０にアクセス可能となる。 On the other hand, as shown in FIG. 4, when the ONU 200 is connected to a test device 180 used at the time of manufacture or maintenance, a predetermined voltage is applied from the applied voltage unit 181 of the test device 180 to the ground line 262b. Is applied. The switch circuits 270a and 270b are switched to connect the contacts 271a and 272a and the contacts 271b and 272b, respectively, when a predetermined voltage is applied to the ground line 262b. As a result, the first serial signal terminal 121 and the first serial IF unit 242 are connected, and the ONU function unit 120 can be accessed from the serial signal input / output unit 182 of the test equipment.
本実施形態のＯＮＵ２００でも、第１のシリアルＩＦ部２４２からＯＮＵ機能部１２０の第１のシリアル信号端１２１または電気／光変換部１１０の第２のシリアル信号端１１１のいずれかに切り替えて接続するスイッチ回路２７０ａ、２７０ｂを備える構成とすることにより、製造時や保守時などに用いられる試験用機器１８０に接続された場合のみ、第１のシリアルＩＦ部２４２を介してＯＮＵ機能部１２０にアクセスすることが可能となっている。これにより、、製造時や保守時にＯＮＵ２００の動作情報の読み出しおよび設定を行うことが可能となり、保守等の作業を大幅に効率化できる。 Also in the ONU 200 of this embodiment, the first serial IF unit 242 is switched and connected to either the first serial signal terminal 121 of the ONU function unit 120 or the second serial signal terminal 111 of the electrical / optical conversion unit 110. With the configuration including the switch circuits 270a and 270b, the ONU function unit 120 is accessed via the first serial IF unit 242 only when connected to the test equipment 180 used during manufacturing or maintenance. It is possible. Thereby, it becomes possible to read out and set the operation information of the ONU 200 at the time of manufacturing and maintenance, and the work such as maintenance can be made much more efficient.
また、外部ノード７０に接続されているときは、スイッチ回路２７０ａ、２７０ｂを切り替えて第１のシリアルＩＦ部２４２を電気／光変換部１１０の第２のシリアル信号端１１１に接続させるようにすることで、ＯＮＵ機能部１２０にアクセスできないようにしてセキュリティを高めている。 When connected to the external node 70, the switch circuits 270a and 270b are switched to connect the first serial IF unit 242 to the second serial signal terminal 111 of the electrical / optical conversion unit 110. Therefore, security is enhanced by preventing access to the ONU function unit 120.
本発明の第３の実施の形態に係るＯＮＵの構成を、図５を用いて説明する。図５は、第３の実施の形態に係るＯＮＵ３００の構成を示すブロック図である。本実施形態のＯＮＵ３００でも、インタフェースモジュール３４０が主信号ＩＦ部３４１と、第１のシリアルＩＦ部３４２と、給電ＩＦ部３４４とを有する構成としている。また、本実施形態ではスイッチ回路を用いない構成としている。 The configuration of the ONU according to the third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing a configuration of the ONU 300 according to the third embodiment. Also in the ONU 300 of this embodiment, the interface module 340 is configured to include a main signal IF unit 341, a first serial IF unit 342, and a power feeding IF unit 344. In this embodiment, the switch circuit is not used.
図５において、ＯＮＵ機能部１２０と電気／光変換部１１０とがＩ２Ｃバス３６３ａ、３６３ｂに並列に接続されており、第１のシリアルＩＦ部３４２からＯＮＵ機能部１２０の第１のシリアル信号端１２１および電気／光変換部１１０の第２のシリアル信号端１１１へは、Ｉ２Ｃバス３６３ａ、３６３ｂを経由して常に接続された状態に構成されている。 In FIG. 5, the ONU function unit 120 and the electrical / optical conversion unit 110 are connected in parallel to the I2C buses 363 a and 363 b, and the first serial signal terminal 121 of the ONU function unit 120 is connected from the first serial IF unit 342. The second serial signal terminal 111 of the electrical / optical converter 110 is always connected via the I2C buses 363a and 363b.
ＯＮＵ機能部１２０は、Ｉ２Ｃバス３６３ａ、３６３ｂを経由して第１のシリアル信号端１２１から第１のシリアルＩＦ部３４２に接続されるとともに、接地線３６２ｂから制御用信号を分岐して入力している。ここでは、ＯＮＵ機能部１２０は、接続線の切替手段を備え、接地線３６２ｂに印加されている電圧を制御用信号としており、接地線３６２ｂに所定の電圧が印加されているか否かによって、第１のシリアルＩＦ部３４２からのアクセスを許可するか否かを判定している。 The ONU function unit 120 is connected to the first serial IF unit 342 from the first serial signal terminal 121 via the I2C buses 363a and 363b, and branches and inputs a control signal from the ground line 362b. Yes. Here, the ONU function unit 120 includes a connection line switching unit, uses the voltage applied to the ground line 362b as a control signal, and determines whether the predetermined voltage is applied to the ground line 362b. It is determined whether or not access from one serial IF unit 342 is permitted.
ＯＮＵ３００が外部ノード７０のＭＳＡインタフェーススロットに接続されて通常に運用される時は、接地線２６２ｂが外部ノード７０を介して接地される。この場合には、接地線３６２ｂに所定の電圧が印加されていないことから、ＯＮＵ機能部１２０は第１のシリアルＩＦ部３４２からのアクセスを許可しない。これに対し、ＯＮＵ３００の製造時や保守時などに用いられる試験用機器に接続されている場合には、試験用機器から接地線３６２ｂに所定の電圧が印加されるように構成されている。ＯＮＵ機能部１２０は、接地線３６２ｂに所定の電圧が印加されていることを検知すると、第１のシリアルＩＦ部３４２からのアクセスを許可する。 When the ONU 300 is connected to the MSA interface slot of the external node 70 and is normally operated, the ground line 262b is grounded via the external node 70. In this case, since a predetermined voltage is not applied to the ground line 362b, the ONU function unit 120 does not permit access from the first serial IF unit 342. On the other hand, when the ONU 300 is connected to a test device used during manufacturing or maintenance, a predetermined voltage is applied from the test device to the ground line 362b. When the ONU function unit 120 detects that a predetermined voltage is applied to the ground line 362b, the ONU function unit 120 permits access from the first serial IF unit 342.
このように、ＯＮＵ３００では製造時や保守時などに用いられる試験用機器に接続された場合のみ、第１のシリアルＩＦ部３４２を介してＯＮＵ機能部１２０にアクセスできる構成としており、製造時や保守時にはＯＮＵ３００の動作情報の読み出しおよび設定を行うことが可能となり、保守等の作業を大幅に効率化できる。 As described above, the ONU 300 is configured such that the ONU function unit 120 can be accessed via the first serial IF unit 342 only when connected to a test device used during manufacturing or maintenance. Sometimes, it becomes possible to read and set the operation information of the ONU 300, and the work such as maintenance can be made much more efficient.
また、ＯＮＵ３００が外部ノード７０に接続されているときは、接地線３６２ｂが接地されて所定の電圧が印加されていないことから、ＯＮＵ機能部１２０がこれを検知することで、第１のシリアルＩＦ部３４２からＯＮＵ機能部１２０をアクセスするのを許可しないようにすることができる。これにより、ＯＮＵ機能部が不正にアクセスされるのを防止してセキュリティを高めている。
なお、Ｉ２Ｃバス３６３ａ、３６３ｂに接続された電気／光変換部１１０は、第２のシリアル信号端１１１と第１のシリアルＩＦ部３４２との間で常に信号伝送可能とすることができる。 Further, when the ONU 300 is connected to the external node 70, the ground line 362b is grounded and a predetermined voltage is not applied. Therefore, the ONU function unit 120 detects this, whereby the first serial IF Access to the ONU function unit 120 from the unit 342 may not be permitted. This prevents the ONU function unit from being accessed illegally and enhances security.
The electrical / optical conversion unit 110 connected to the I2C buses 363a and 363b can always transmit signals between the second serial signal terminal 111 and the first serial IF unit 342.
本実施の形態における記述は、本発明に係る加入者宅側光回線終端装置の一例を示すものであり、これに限定されるものではない。本実施の形態における加入者宅側光回線終端装置の細部構成及び詳細な動作等に関しては、本発明の趣旨を逸脱しない範囲で適宜変更可能である。 The description in the present embodiment shows an example of the subscriber premises optical line termination device according to the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of the subscriber premises optical line terminating device in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

Claims (9)

  1. センタ側光回線終端装置と光伝送路で接続され、外部ノードとは信号線で接続されて終端処理を行う加入者宅側光回線終端装置であって、
    前記センタ側光回線終端装置に接続されて主信号の光電気変換及び逆光電気変換を行う電気／光変換部と、
    　前記電気／光変換部に接続されて前記主信号の終端処理を行う光回線終端装置機能部と、
    前記光回線終端装置機能部に接続されて前記主信号のシリアル・パラレル変換及び逆シリアル・パラレル変換を行うシリアル／パラレル変換部と、
    前記シリアル／パラレル変換部に接続されて前記外部ノードとの間で前記主信号の入出力を行う主信号ＩＦ（インタフェース）部と、所定のシリアル信号を入出力する第１のシリアルＩＦ部と、電力供給を行うための給電線および接地線に接続される給電ＩＦ部とを有するインタフェースモジュールと、を備え、
    所定の条件が成立すると、前記光回線終端装置機能部に設けられた第１のシリアル信号端と前記第１のシリアルＩＦ部とが電気的に接続される
    ことを特徴とする加入者宅側光回線終端装置。     It is connected to the center side optical line terminator by an optical transmission line, and is connected to the external node by a signal line and performs termination processing.
    An electrical / optical converter connected to the center-side optical line terminator for performing photoelectric conversion and reverse photoelectric conversion of the main signal;
    An optical line terminator function unit connected to the electrical / optical conversion unit for terminating the main signal;
    A serial / parallel converter connected to the optical line terminator function unit for performing serial / parallel conversion and inverse serial / parallel conversion of the main signal;
    A main signal IF (interface) unit that is connected to the serial / parallel conversion unit and inputs / outputs the main signal to / from the external node; a first serial IF unit that inputs / outputs a predetermined serial signal; An interface module having a power supply IF unit connected to a power supply line and a ground line for supplying power, and
    When a predetermined condition is satisfied, the first serial signal terminal provided in the optical line terminator function unit and the first serial IF unit are electrically connected to each other. Line termination equipment.
  2. 前記所定の条件は、前記接地線に所定の電圧が印加されると成立し、前記所定の条件が成立しないときは前記第１のシリアル信号端と前記第１のシリアルＩＦ部とが電気的に遮断されている
    ことを特徴とする請求項１に記載の加入者宅側光回線終端装置。     The predetermined condition is satisfied when a predetermined voltage is applied to the ground line, and when the predetermined condition is not satisfied, the first serial signal terminal and the first serial IF unit are electrically connected to each other. 2. The subscriber premises optical line terminator according to claim 1, which is blocked.
  3. 前記所定の条件が成立すると、前記第１のシリアル信号端と前記第１のシリアルＩＦ部との間を電気的に接続する切替手段をさらに備える
    ことを特徴とする請求項１または２に記載の加入者宅側光回線終端装置。     3. The switching device according to claim 1, further comprising a switching unit that electrically connects the first serial signal terminal and the first serial IF unit when the predetermined condition is satisfied. Subscriber premises optical line termination equipment.
  4. 前記切替手段は、前記所定の条件が成立しているときに前記第１のシリアルＩＦ部と前記第１のシリアル信号端とを電気的に接続し、それ以外のときは前記第１のシリアルＩＦ部と前記第１のシリアル信号端との間を電気的に遮断するスイッチ回路である
    ことを特徴とする請求項３に記載の加入者宅側光回線終端装置。     The switching means electrically connects the first serial IF unit and the first serial signal terminal when the predetermined condition is satisfied, and otherwise the first serial IF. 4. The subscriber premises optical line terminator according to claim 3, wherein the switch circuit is a switch circuit that electrically cuts off the first serial signal terminal.
  5. 前記スイッチ回路は、前記所定の条件が成立していないときは、前記第１のシリアルＩＦ部と前記電気／光変換部に設けられた第２のシリアル信号端とを電気的に接続する
    ことを特徴とする請求項４に記載の加入者宅側光回線終端装置。     The switch circuit electrically connects the first serial IF unit and a second serial signal terminal provided in the electrical / optical conversion unit when the predetermined condition is not satisfied. 5. The subscriber premises optical line terminator according to claim 4,
  6. 前記インタフェースモジュールは、第２のシリアルＩＦ部をさらに有し、
    前記第２のシリアルＩＦ部は前記電気／光変換部に設けられた第２のシリアル信号端に接続される
    ことを特徴とする請求項４に記載の加入者宅側光回線終端装置。     The interface module further includes a second serial IF unit,
    5. The subscriber premises optical line terminator according to claim 4, wherein the second serial IF unit is connected to a second serial signal terminal provided in the electrical / optical conversion unit.
  7. 前記第１のシリアル信号端および前記電気／光変換部に設けられた第２のシリアル信号端が前記第１のシリアルＩＦ部にバス接続され、
    前記切替手段は、前記所定の条件が成立していると判定すると、前記第１のシリアルＩＦ部から前記第１のシリアル信号端を介して前記光回線終端装置機能部へのアクセスを許可する
    ことを特徴とする請求項３に記載の加入者宅側光回線終端装置。     The first serial signal end and the second serial signal end provided in the electrical / optical conversion unit are bus-connected to the first serial IF unit,
    If it is determined that the predetermined condition is satisfied, the switching unit permits access from the first serial IF unit to the optical line terminator function unit via the first serial signal end. 4. The subscriber premises optical line termination device according to claim 3.
  8. 前記第１のシリアル信号端と前記第１のシリアルＩＦ部との間がＩ２Ｃで接続される
    ことを特徴とする請求項１乃至７のいずれか１項に記載の加入者宅側光回線終端装置。     8. The customer premises optical line termination device according to claim 1, wherein the first serial signal terminal and the first serial IF unit are connected by I2C. .
  9. 前記第２のシリアル信号端と前記第１のシリアルＩＦ部との間がＩ２Ｃで接続される
    ことを特徴とする請求項５または７に記載の加入者宅側光回線終端装置。
     
     
          8. The subscriber premises optical line terminator according to claim 5 or 7, wherein the second serial signal terminal and the first serial IF unit are connected by I2C.


     
PCT/JP2008/054346 2007-12-26 2008-03-11 Subscriber premises optical network unit WO2009081597A1 (en)

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