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| ADM | Add Drop Multiplexer | | BER | Bit Error Ratio | | BOL | Beginning of Life | | BU | Branching Unit | | CLS | Cable Landing Station | | CPT | Cone Penetration Testing | | DC | Direct Current | | DCN | Data Communications Network | | DEF | Double End Feed | | DTS | Desk Top Study | | DWDM | Dense Wavelength Division Multiplexing | | ECT | Equipment Craft Terminal | | EMS | Element Management System | | EOL | End Of Life | | ETSI | European Telecommunications Standards Institute | | FAT | Factory Acceptance Test | | FEC | Forward Error Correction | | FIT | Failure In Time – the number of failures in 109 device hours | | FP | Fibre Pair | | Gbit/s | Gigabits (109) per Second | | GE | Gigabit Ethernet | | GFP | Generic Framing Procedure | | ICPC | International Cable Protection Committee | | IEC | International Electrotechnical Commission | | IST | In Station Tests | | ITU | International Telecommunications Union – Telecommunications Standardisation Sector | | LCAS | Link Capacity Adjustment Scheme | | MOP | Method of Procedure | | MRS | Marine Route Survey | | MSP | Multiplex Section Protection | | MTTR | Mean Time To Repair | | NCP | Network Connection Protection | | NTP | Network Time Protocol | | OADM BU | Optical Add Drop Multiplexing Branch Unit | | ODF | Optical Distribution Frame | OSP
| Outside Plant
| | PFE | Power Feeding Equipment | | POW | Plan of Work | | RFPA | Ready For Provisional Acceptance | | RPL | Route Position List | | RTT | Repair Turnaround Time | | SDH | Synchronous Digital Hierarchy | | SEF | Single End Feed | | SESR | Severely Errored Second Ratio(as defined in ITUT Recommendation G.826/8) | | SLD | Straight Line Diagram | | SLTE | Submarine Line Terminating Equipment | | SOL | Start Of Life | | SSU | Synchronisation Source Unit | | TSE | Terminal Station Equipment | | UJ | Universal Joint |
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