Lucent Technologies LambdaUnite Installation Manual page 346

POTS
Plain Old Telephone Service
PP
Pointer Processing
PRC (Primary Reference Clock)
The main timing clock reference in SDH equipment.
Preprovisioning
The process by which the user specifies parameter values for an entity in advance of some of
the equipment being present. These parameters are maintained only in NVM. These
modifications are initiated locally or remotely by either LambdaUnite CIT or Navis Optical
EMS. Preprovisioning provides for the decoupling of manual intervention tasks (for example,
install circuit packs) from those tasks associated with configuring the node to provide services
(for example, specifying the entities to be cross-connected).
PRI
Primary
Proactive Maintenance
Refers to the process of detecting degrading conditions not severe enough to initiate protection
switching or alarming, but indicative of an impending signal fail or signal degrade defect.
Protection Access
To provision traffic to be carried by protection tributaries when the port tributaries are not being
used to carry the protected working traffic.
Protection Group Configuration
The members of a group and their roles, for example, working protection, line number, etc.
Protection Path
One of two signals entering a path selector used for path protection switching or dual ring
interworking. The other is the working path. The designations working and protection are
provisioned by the user, whereas the terms active path and standby path indicate the current
protection state.
Protection State
When the working unit is currently considered active by the system and that it is carrying
traffic. The "active unit state" specifically refers to the receive direction of operation — since
protection switching is unidirectional.
PROTN (Protection)
Extra capacity (channels, circuit packs) in transmission equipment that is not intended to be
used for service, but rather to serve as backup against equipment failures.
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G L O S S A R Y
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Lucent Technologies 365-374-059
Issue a, January 2002