Nortel Networks BCM50 - Manual (Page 27)

Chapter 1 Getting started 27
Installation and Maintenance Guide
Symbols and text conventions
These symbols highlight critical information for the BCM50 2.0 system.
OSI Open switch interval
PCI Peripheral component interface
PEC Processor expansion card
PSTN Public switched telephone network
PSU Power supply unit
QoS Quality of service
RAI Remote alarm indication
RAID Redundant array of independent disks
REN Ringer equivalence number
RFO Redundant feature option
RMS Root mean square
RPS Redundant power supply
SAPS Station auxiliary power supply
SELV Safety extra low voltage
SSD System status display
UPS Uninterruptable power supply
USB Universal serial bus
VMWI Visual message waiting indicator
VoIP Voice over Internet protocol
WAN Wide area network
Caution: Alerts you to conditions where you can damage the equipment.
Danger: Alerts you to conditions where you can get an electrical shock.
Warning: Alerts you to conditions where you can cause the system to fail or work
improperly.
Table 1 Acronyms (Sheet 3 of 3)
Acronym Description