Glossary
Terms and Definitions
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Lucent Technologies - Proprietary
See notice on first page
365-372-327 R2.0
Issue 1, October 2003
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NE ACTY - Near End Activity
An LED on the faceplate of the SYSCTL circuit pack.
NMA - Network Monitoring and Analysis
An operations system designed by Telcordia Technologies which is used to
monitor network facilities.
NMON - Not Monitored
A provisioning state for equipment that is not monitored or alarmed.
Node
In SONET, a node is a line terminating element.
Non-Revertive
A protection switching mode in which, after a protection switch occurs, the
equipment remains in its current configuration after any failure conditions that
caused a protection switch to occur clear or after any external switch
commands are reset. See Revertive.
NSAP - Network Services Access Point
An address that identifies a network element. Used for maintenance
subnetwork communication using the OSI protocol.
O
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-1
Optical Carrier Level 1 Signal (51.844 Mb/s).
OC-3
Optical Carrier Level 3 Signal (155 Mb/s).
OC-3c (STS-3c)
Optical Carrier Level 3 Concatenated Signal. Low-speed broadband
equivalent to three STS-1s linked together with a single path overhead.
OC-12
Optical Carrier Level 12 Signal (622 Mb/s).
OC-12c (STS-12c)
Optical Carrier Level 12 Concatenated Signal. High-speed broadband
equivalent to twelve STS-1s linked together with a single path overhead.
