al and Electronics Engineers Internet Engineering Task Force Incumbent Local Exchange Carrier Intensity Modulation InGaAs Indium-Gallium-Arsenide Indium Phosphide Intelligent Optical Network Internet Protocol Intelligent Protection Switching Internet Service Provider International Telecommunications Union Interexchange Carrier Layer 2 Layer 2 Switch Layer 3 Acronyms Layer 3 Switch Local Area Network Laser Diode Local Exchange Carrier Light Emitting Diode Link Management Protocol Loss of Frame Line Overhead Loss of Light LOP-P Loss of Pointer-Path Loss of Signal LOS-LV Loss of Signal-Line VT Interface Label-Switched Path Label-Switched Router Line Terminating Equipment Media Access Control Metropolitan Area Network Metropolitan Area Service Provider Modified Chemical Vapor Deposition Micro-Electro Mechanical System Mode Field Diameter Megahertz Multimode Fiber Multiwavelength Optical Repeater Multiprotocol Label Switching Multiservice Provisioning Platform Numerical Aperture Nondispersion-Shifted Fiber Network Element Network Node Interface Nonreturn to Zero Network Service Provider NZDSF Nonzero Dispersion-Shifted Fiber Acronyms Optical Add/Drop Multiplexer (or Module) Optical Add/Drop Node OAM&P Operations, Administration, Maintenance, & Provisioning Optical Carrier Outside Chemical Vapor Deposition Optical Domain Service Interconnect O-E-O Optical to Eletrical to Optical Optical Internetworking Forum Optical Line Amplifier O-NNI Optical Network-Node Interface Operations Systems Network Optical Signal-to-Noise Ratio Open Shortest Path First Operations Support System Optical Time Division Multiplexing Optical Transport Network O-UNI Optical User-Network Interface Optical Virtual Private Network Optical Crossconnect Point to Point PHASIC Photonic Hybrid Active Silica Integrated Circuit Physical Layer Positive Intrinsic Negative Polarization Mode Dispersion Path Overhead Passive Optical Network Point of Presence Packet over SONET Point-to-Point Protocol Primary Reference Source Packet Switch Capable Path Terminatin