GL-16 Issue 5 June 2000
363-206-208
Glossary
PROTN
Protection.
PRS
Primary Reference Source.
PVC
Permanent Virtual Circuit. (X.25)
PWR
Power.
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 equipment
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 ser-
vice 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 fash-
ion. 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 process.) Line switched
rings actively reroute traffic over a protection line.
RPP
Reliability Prediction Procedure.
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) Previ-
ous name for NARTAC (North American Regional Technical Assistance Center).
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