NTF
No Trouble Found
NTP
Network time protocol
NVM
Non-Volatile Memory
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O
OAM&P
Operations, Administration, Maintenance, and Provisioning
OC, OC-n - Optical Carrier
The optical signal that results from an optical inversion of an STS signal; that is, OC-1 from
STS-1 and OC-n from STS-n.
OC-3
Optical Carrier, Level 3 Signal (155.52 Mb/s)
OC-3
Optical Carrier Level 3 Signal (155 Mb/s).
OI
Operations Interworking
OOF
Out of Frame
OOS
Out-of-Service
Open Systems Interconnection (OSI)
Referring to the OSI reference model, a logical structure for network operations standardized by
the International Standards Organization (ISO).
Operations Interface
Any interface providing you with information on the system behavior or control. These include
the equipment LEDs, SYSCTL faceplate, WaveStar
®
CIT, office alarms, and all telemetry
interfaces.
Operations Interworking (OI)
The capability to access, operate, provision, and administer remote systems through craft
interface access from any site in a SONET/SDH network or from a centralized operations
system.
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G L O S S A R Y
G L - 1 8
Lucent Technologies
365-372-333 R2.1
Issue 4, June 2005