Do it again, what's happened?

Abbreviations

• 0xYY: Y is a value in hexadecimal presentation
• 3R: Re-amplification, Reshaping and Retiming
• ACT: Activation (in the TCM ACT byte)
• AI: Adapted Information
• AIS: Alarm Indication Signal
• APS: Automatic Protection Switching
• BDI: Backward Defect Indication
• BEI: Backward Error Indication
• BIAE: Backward Incoming Alignment Error
• BIP: Bit Interleaved Parity
• CBR: Constant Bit Rate
• CI: Characteristic Information
• CM: Connection Monitoring
• CRC: Cyclic Redundancy Check
• DAPI: Destination Access Point Identifier
• EXP: Experimental
• ExTI: Expected Trace Identifier
• FAS: Frame Alignment Signal
• FDI: Forward Defect Indication
• FEC: Forward Error Correction
• GCC: General Communication Channel
• IaDI: Intra-Domain Interface
• IAE: Incoming Alignment Error
• IrDI: Inter-Domain Interface
• JOH: Justification Overhead
• LSB: Least Significant Bit
• MFAS: Multi-Frame Alignment Signal
• MFI: Multi-frame Indicator
• MS: Maintenance Signal
• MSB: Most Significant Bit
• MSI: Multiplex Structure Identifier
• NNI: Network Node Interface
• OCh: Optical channel with full functionality
• OCI: Open Connection Indication
• ODU: Optical Channel Data Unit
• ODUk: Optical Channel Data Unit-k
• ODTUjk: Optical channel Data Tributary Unit j into k
• ODTUG: Optical channel Data Tributary Unit Group
• ODU-Xv: X virtually concatenated ODUk's
• OH: Overhead
• OMS: Optical Multiplex Section
• OM-OH: Optical Multiplex Section Overhead
• OMU: Optical Multiplex Unit
• ONNI: Optical Network Node Interface
• OOS: OTM Overhead Signal
• OPS: Optical Physical Section
• OPU: Optical Channel Payload Unit
• OPUk: Optical Channel Payload Unit-k
• OPUk-Xv: X virtually concatenated OPUk's
• OSC: Optical Supervisory Channel
• OTH: Optical Transport Hierarchy
• OTM: Optical Transport Module
• OTN: Optical Transport Network
• OTS: Optical Transmission Section
• OTS-OH: Optical Transmission Section Overhead
• OUT: Optical Channel Transport Unit
• OTUk: Optical Channel Transport Unit-k
• PCC: Protection Communication Channel
• PM: Path Monitoring
• PMI: Payload Missing Indication
• PMOH: Path Monitoring OverHead
• Ppm: parts per million
• PRBS: Pseudo Random Binary Sequence
• PSI: Payload Structure Identifier
• PT: Payload Type
• RES: Reserved for future international standardization
• RS: Reed-Solomon
• SAPI: Source Access Point Identifier
• Sk: Sink
• SM: Section Monitoring
• SMOH: Section Monitoring OverHead
• So: Source
• TC: Tandem Connection
• TCM: Tandem Connection Monitoring
• TS: Tributary Slot
• TxTI: Transmitted Trace Identifier
• UNI: User-to-Network Interface
• VCG: Virtual Concatenation Group
• VCOH: Virtual Concatenation Overhead
• vcPT: virtual concatenated Payload Type

The key words

The following layers are defined in OTN:

• OPUk: Optical payload unit k (k = 0, 1, 2, 3, 4)
• ODUk: Optical data unit k (k = 0, 1, 2, 3, 4)
• OTUk: Optical transport unit k (k = 1, 2, 3, 4)
• OCh: Optical channel, a single wavelength
• OMSn: Optical multiplex section of order n (Capacities for n = 0 and n = 16 are defined)
• OTSn: Optical transmission section of order n (Capacities for n = 0 and n = 16 are defined)
• OTM-n.m: Optical transport module of rate m with n optical channels. Possible values for m are:
  • 1: 2.5 Gb/s
  • 2: 10 Gb/s
  • 3: 40 Gb/s
  • 4: 100 Gb/s
• OMU: Optical Multiples Unit
• OSC: Optical Supervisory Channel
• OLA: Optical in-Line Amplifier
• OPA: Optical Pre-Amplifier
• OBA: Optical Booster Amplifier