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O
OA
Optical Amplifier
OC, OC-n
Optical Carrier
OC-12
Optical Carrier, Level 12 Signal (622.08 Mbit/s)
OC-192
Optical Carrier, Level 192 (9953.28 Mbit/s) (10 Gbit/s)
OC-3
Optical Carrier, Level 3 Signal (155 Mbit/s)
OC-48
Optical Carrier, Level 48 (2488.32 Mbit/s) (2.5 Gbit/s)
OC-768
Optical Carrier, Level 768 (39813.12 Mbit/s) (40 Gbit/s)
OP
Optical Pack
OSI (Open Systems Interconnection)
Referring to the OSI reference model, a logical structure for network operations standardized by
the International Standards Organization (ISO).
OUT
Transmit
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P
PCB
Printed Circuit Board
PDP
Power Distribution Panel
PI
Power Interface
Port (also called Line)
The physical interface, consisting of both an input and output, where an electrical or optical
transmission interface is connected to the system and may be used to carry traffic between
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G L O S S A R Y
G L - 8
Lucent Technologies
365-374-074
Issue a, April 2002