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Glossary
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Non-revertive switching
In non-revertive switching, there is an active and standby high-speed line, circuit pack, etc. When
a protection switch occurs, the standby line, circuit pack, etc., is selected causing the old standby
line, circuit pack, etc., to be used for the new active line, circuit pack, etc. The original active line,
circuit pack, etc., becomes the standby line, circuit pack, etc. This status remains in effect when
the fault clears. Therefore, this protection scheme is "non-revertive" in that there is no switch
back to the original status in effect before the fault occurred.
NTU
etwork Termination Unit
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O
OC-n
Optical Carrier, Level n
ODF
Optical Distribution Frame
OI
Optical Interface
OMS Administrator
See OMS System Administrator.
OMS System Administrator
A user of the OMS application with System Administrator privileges. See also User Privilege.
Operator
A user of the OMS application with Operator privileges. See also User Privilege.
OS
Operations System - A central computer-based system that is used to provide operations,
administration and maintenance functions.
OSI
Open Systems Interconnection
OW
(Engineering) Order Wire
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P
Path
A logical connection between one termination point at which a standard format for a signal at the
given rate is assembled and from which the signal is transmitted, and another termination point at
which the received standard frame format for the signal is disassembled.
PC
Personal Computer
PCB
Printed Circuit Board
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365-313-103R8.0
Issue 2 July 2009
Alcatel-Lucent – Internal
Proprietary – Use pursuant to Company instruction
GL-5
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