PSF
Power Supply Filter
PSN
Packet-Switched Network
PSTN
Public Switched Telephone Network
PT
Protected Terminal Power-supply filter and Timing circuit pack
PVID
Port VLAN ID
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Q
Q-LAN
Thin Ethernet LAN (10BaseT) that connects the manager to gateway network elements
so that management information can be exchanged between network elements and
management systems.
QAF
Q-Adapter Function (in NE)
QOS
Quality Of Service
Quality Level (QL)
The quality of the timing signal(s) that are provided to clock a network element. The
level is provided by the Synchronization Status Marker which can accompany the timing
signal. If the System and Output Timing Quality Level mode is “Enabled”, and if the
signal selected for the Station-Clock Output has a quality level below the Acceptance
Quality Level, the network element “squelches” the Station-Clock Output Signal, which
means that no signal is forwarded at all. Possible levels are: - PRC (Primary Reference
Clock) - SSU_T (Synchronization Supply Unit - Transit) - SSU_L (Synchronization
Supply Unit - Local) - SEC (SDH Equipment Clock) - DUS (Do not Use for
Synchronization).
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R
RA
Regenerator Application
Radio Protection Switching system (RPS)
The main function of the RPS is to handle the automatic and manual switching from a
main channel to a common protection channel in an N+1 system.
Radio Relay (RR)
A point-to-point Digital Radio system to transport STM-1 signals via microwaves.
RCU
Rigid Connect Unit
Glossary
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365-312-847R4.0
Issue 4, November 2006
Lucent Technologies - Proprietary
See notice on first page
GL-23