363-206-204
GLOSSARY
Issue 9 October 1998
GL-17
R
RAM
Random Access Memory.
Reactive Maintenance
Refers to detecting defects/failures and clearing them.
Remote
See “Far-End” ("FE") and “DT”.
Revertive
A protection switching mode in which, after a protection switch occurs, the equip-
ment returns to the nominal configuration after any failure conditions that caused a
protection switch to occur clear or after any external switch commands are reset.
(That is, the service equipment is active, and the protection equipment is standby,
unless the active equipment is currently in a failure mode.) (See "Non-Revertive.")
Ring
A configuration of nodes comprised of network elements connected in a circular
fashion. Under normal conditions, each node is interconnected with two neighbors
and includes capacity for transmission in either direction between adjacent nodes.
Path switched rings use a head-end bridge and tail-end switch (both transmitters
are always transmitting and the receiver selects one or the other signal to pro-
cess.) Line switched rings actively reroute traffic over a protection line.
RPP
Reliability Prediction Procedure — Described in Bellcore TR-NWT-00032.
RT
Remote Terminal — An unstaffed equipment enclosure that may have a controlled
or uncontrolled environment.
RTAC
Lucent Technologies Regional Technical Assistance Center (1-800-225-RTAC)
RZ
Return to Zero.
S
SA
Service Affecting.
SD
Signal Degrade.
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