【導(dǎo)讀】放站只配備主子架。塊，每個(gè)從子架最多配置4個(gè)波共8塊OTU盤?；?qū)U(kuò)展盤送來(lái)的紅帶16個(gè)波分解成1－16波并分別送到OTU對(duì)應(yīng)的RX盤中；接收從OTU的TX盤送來(lái)的17－32波，將其合成在一根光纖上送到擴(kuò)展盤；復(fù)用（發(fā)送側(cè)）和分解（接受側(cè)）；備注：CH22是第1波，CH23是第2波，以此類推，CH37是第16波。入損耗中的最大值與最小值之差即為最大插損差。對(duì)該指標(biāo)的規(guī)范主要從多波長(zhǎng)。波后的信號(hào)還需要長(zhǎng)距離的傳輸，而分波后的信號(hào)會(huì)被馬上終結(jié)掉。理想情況是它只從端口1出來(lái)，可實(shí)際上，總有一部分從相臨的端口2出來(lái)。離度越大越好，一般在30dB以上。號(hào)的入纖光功率，它應(yīng)該有比較大的光功率輸出。它用以接收線路上來(lái)的光信號(hào)，接收后將SPV監(jiān)控。它接收上游站點(diǎn)經(jīng)線路傳送來(lái)的光信號(hào)，經(jīng)放大后輸出到下游線路上，正常情況下嚴(yán)禁打開(kāi)光放盤蓋板，否則激光器會(huì)自動(dòng)關(guān)閉。

　　

【正文】 g Band Optical Demultiplexer board LB_OMX Long Band Optical Multiplexer board LB_OMDX Long Band Optical Multiplexer and Demultiplexer board L_IECB Local IEC Bus LOS Loss Of Signal LS Less Significant LSB Less Significant Bit LSD Laser ShutDown LT Line Terminal LTmcs Line Terminal for multi–channel system MAC Medium Access Control MD Mediation Device of TMN ME Management Equipment (referred to OS) 55 MGND Mechanical ground MM Maintenance Memory MNE Master or Mediation Network Element MS Multiplex Section MSB Most Significant Bit NB_OPA_SPV Narrow Band Optical Pre–Amplifier board with SuPerVison N_IECB Network IEC Bus NE Network Element NES Network Element Synthsesis NML Network Management Layer NORM. / . Normal / alarm stop switch NSAP Network Service Access Point nrREP non–regenerative Repeater NRZ Non Return to Zero NRZI Non Return to Zero Inverted NURG Not URGent QUICC Quad Integrated Communication Controller OADM Optical Add Drop Multiplexer OBC On Board Controller OCH Optical Channel ODF Optical distribution Frame OFA Optical Fiber Amplifier OGPI Optical Generic Physical Interface OH OverHead OMS Optical Multiplex Section OS Operation System OSC Optical supervisory channel OSNR Optical Signal Noise Ratio OTS Optical Transmission Section OOF Out Of Frame OS Operation System PI Physical Interface PC Personal Computer PCB Printed Circuit Board PCM Pulse Code Modulation PDH Plesiochronous Digital Hierarchy PDN Public Data Networks P/N Part Number PSU Power Supply Unit RECT REmote Craft Terminal REP REPeater Q3 Interface with Protocol Q3 QECC Interface with Q protocol for Embedded Control Channel RAM Random Access Memory 56 REGEN_10G Regenerator 10 Gb/s STM64 wavelength adaptor RI Remote Inventory RTC Real Time Clock RX receiver SC Slave Card SB_ODX Short Band Optical Demultiplexer board SB_OMDX Short Band Optical Multiplexer Demultiplexer board SER_PLUS Serializer+ board SDH Synchronous Digital Hiearchy SDMA Serial Direct Memory Access SHUT DN Laser Shut down SMEC2 Synchronous Multiplexer Equipment Controller 2 SPI Serial Peripheral Interface SPM Self Phase Modulation SPV SuPerVision (channel) SPV_CPL SuPerVision CouPLer unit SW Software SWDL SoftWare DownLoad SWP SoftWare Product TMN Telemunication Management Network TP Termination Point TCP/IP Transmission Control Protocol/Inter Protocol TRU Top Rack Unit TTP Terminal Test Point TX Transmitter UART Universal Asynchronous Receiver Transmitter URG URGent UIS User Interface Specification USM User Service Manager USART Universal Synchronous and Asynchronous Receiver Transmitter VOA Variable Optical Attenuator WAN Wide Area Network WB_OBA_SPV: Wide Band Optical Booster Amplifier with SuPerVison WB_OLA_SPV: Wide Band Optical In–Line amplifier board with SuPerVison WB_OPA_SPV : Wide Band Optical Pre–amplifier board with SuPerVison WB_OXA_P_20 1480 : Wide Band Optical Double stage amplifier (+20dBm) board with 1480 nm Supervison WB_OXA_P_20 1510 : Wide Band Optical Double stage amplifier (+20dBm) board with 1510 nm Supervison WB_OXA 1510 : Wide Band Optical Double stage amplifier (+14dBm) board with 1510 nm Supervison WB_OXA_P 1510 : Wide Band Optical Double stage amplifier (+17dBm) board with 1510 nm 57 Supervison WB_OXA_P_SPV : Wide Band Optical Double stage amplifier (+17 dbm) board with SuPerVison WB_OXA_SPV : Wide Band Optical Double stage amplifier (+14 dbm) board with SuPerVison WDM : Wavelength Division Multiplex WLA_ : Wavelength adapter board channel ( is the channel number) WLA __ASY: Asynchronous Wavelength adapter board WLA_TS16_1_ Wavelength adapter board optimized for Transmit side channel WLA_RS16_1_ Wavelength adapter board optimized for Receive side channel WLA_TFEC16_ Wavelength adapter board with Forward Error Correction for Transmit side WLA_TFEC16_L16_2 Wavelength adapter board with Forward Error Correction for Transmit side channel with L16_2 host interface. WLA_RFEC16 Wavelength adapter board with Forward Error Correction for Receive side WLA_RFEC16_L16_2 Wavelength adapter board with Forward Error Correction for Receive side with L16_2 host interface. WLA_TRFEC64 Wavelength adapter bidirectional (Transmit and receive) board at Gb/s LIST OF ABBREVIATIONS (1660 PART) ABBREVIATION MEANING ABIL Enabling ABN Abnormal ADM Add/Drop Multiplexer AIS Alarm indication Signal ALS Automatic Laser Shutdown APD Avalanche Photodiode APS Automatic Protection Switching AND Alarm on both station batteries ANSI American National Standards International ASIC Application Specific Integrated Circuit ATM Asynchronous Transfer Module ATTD Attended (alarm storing) AU Administrative Unit AUG Administrative Unit Group AUOH AU Pointer AUX Auxiliary AU4 Administrative unit – level 4 BATT Battery BER Bit Error Rate BIP Bit Interleaved Parity BNC Bayo Not Coupling C Storing mand CE European Conformity 58 CO Central Office CPE Customer premises equipment CT Craft Terminal CMI Code Mark Inversion COAX Coaxial CPI Ining parallel contacts CPO Outgoing parallel contacts CPU Central Processing Unit (referred to Controller equipment unit or Microprocessor) C12/C3/C4 1st, 3rd and 4th level container DC Direct Current DCC Data Communication Channel DCE Data Circuit Terminating Equipment DPLL Digital Phase Locked Loop DTE Data Terminal Equipment EBU European Broadcasting Union EC Equipment Controller ECC Embedded Control Channel ECT Equipment Craft Terminal EMC Electromagic patibility EMI Electromagic interference EOW Engineering Order Wire EPS Equipment Protection Switching ESD Electrostatic discharges ETSI European Telemunication Standards Institute E2PROM Electrically erasable programmable read only