Salah satu Posting Artikel disini pernah dijelaskan Metro Ethernet, kali ini akan saya perkenalkan salah satu teknologi yg banyak berhubungan dg Metro Ethernet. Namanya ROADM. Apa itu...? Silahkan simak...
Teknologi Reconfigurabel Optical Add Drop Multiplexer (ROADM) merupakan pengembangan dari teknologi optik Dense Wavelength Division Multiplexing (DWDM). Perbedaan utama antara ROADM dengan DWDM terletak pada degree atau bahasa awamnya tangan/ cabang dari perangkat OADM yang ada di masing-masing.
Prinsip kerja dasar dari xWDM (DWDM dan Coarse WDM/CWDM) adalah mentransmisikan kombinasi sejumlah panjang gelombang yang berbeda dengan menggunakan perangkat multiplex panjang gelombang optik dalam satu fiber. Pada sisi penerima terjadi proses kebalikannya dimana panjang gelombang tersebut dikembalikan ke sinyal asalnya.
Perangkat OADM berfungsi melakukan add/drop sinyal dalam sistem. Konfigurasi ring, seperti juga pada jaringan SDH, dimaksudkan untuk mengimplementasikan sistem proteksi. Prinsip dasar OADM (dengan topologi ring) adalah:
- Melakukan multiplexing panjang gelombang.
- Memiliki kemampuan menurunkan panjang gelombang l (:baca: lamda) di suatu titik, di mana OADM ditempatkan.
- Memiliki kemampuan add/drop panjang gelombang l (:baca: lamda) di titik OADM.
- Memiliki sistem cross connect pada satuan l (:baca: lamda).
Biasanya Ada beberapa pertimbangan umum yg dipakai sebelum menentukan platform/vendor pabrikan yang berhubungan dengan kapasitas, fungsi, operasi, spesifikasi fisik, transmisi.
- Physical Specs and Protection
- Footprint
- Power Consumption
- Interface Slots per Shelf
- Sparing Options
- Network Protection
- Equipment Protection
- Transmission Characteristics
- Spectrum and Channel Plan
- Number of Wavelengths
- Transmission Distance
- Maximum Node Suppor
- Fiber Types Supported
- Alien Wavelength Support
- Service Functionality
- STM/OC-N Support
- Ethernet Support
- Protocol Support
- VCAT, GFP, LCAS Support
- ROADM Technology
- ROADM Implementation
- Capacity and Density
- System Capacity
- Common Equipment Footprint
- STM/OC-N Port Density
- Ethernet Port Density
- SAN Port Density
- Sub-rate Muxing
- Operations
- Control Plane
- Network Management
- OSS/BSS Interfaces
- Performance Monitoring
- Power Balancing Technology
- Physical Attributes
- Dimensions (English and Metric)
- Environmental Certifications
- Power Input Requirements
- Power Consumption
- Shelves/Rack
- Function and Role in Solution
- Platform and Solution
- Equivalent Network Functionality
- Architecture
- Topology and Distance
- Topologies Supported
- Single Span Distance
- Ring Circumference
- Maximum Nodes
- Capacity
- Wavelengths/Fiber Pair
- Wavelengths/Shelf, Wavelengths/System
- Line Rates Supported
- System Capacity No. Chassis for Max. Configuration
- Interface Slots per Shelf
- Spectrum
- Spectrum Bands Used
- Channel Spacing Grid
- Fiber Requirements
- Supported Fiber Types
- Optics
- Client Optics
- Line Optics
- Tunability
- Client Interfaces
- Multirate SONET/SDH Client Side Interface Cards
- Subrate Multiplexing Client Side Interface Cards
- ADM Multiplexing Transponders
- Gigabit Ethernet Multiplexing Transponders
- OC-192 Ports/Chassis
- OC-48 Ports/Chassis
- OC-12 Ports/Chassis
- OC-3 Ports/Chassis
- 10 GbE Ports/Chassis
- GbE Ports/Chassis
- DS3 Ports/Chassis
- ESCON/FICON/Fibre Channel Ports/Chassis
- Management
- Control Plane Support
- Optical Supervisory Channel
- Element/Network Management System
- Network Modeling Tools
- OSMINE Certifications
- OSS Interfaces
- Performance Monitoring
- Features
- ROADM, ADM Capabilities
- Wavelength Blocker/Selective Switch
- Cross Connect Functionality
- Ring Support
- Optical Channel Monitor
- Dynamic Power Equalization
- Hot-swappable Modules
- Integrated Optics
- Card Sharing
- Scalability
- Software Release
- Technologies
- Amplification
- Forward Error Correction
- Dispersion Compensation
- Digital Wrapper
- GFP Support
- LCAS Support
- VCAT Support
- Tributary Protection
- Per Wavelength Protection
- Line Protection
- Single Fiber Working Capabilites
- Transient Control
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