Alcatel-Lucent 9500 MXC, User Manual, Page: 894 / 916

20 Alcatel-Lucent
Rack Unit, 1 standard EIA rack unit (44.5 mm / 1.75 inch)
Rx
Receive
SAW
Surface Acoustic Wave (filter)
SDH
S
ynchronous Digital Hierarchy
SES
S
everely Errored Seconds
SI
System International units
Simple Network Management Protocol (SNMP)
Standard protocol used to manage and control IP gateways and the networks to which they are attached.
Site
Typically, a site is a location where a device or devices are stored.
SLIP
Serial-Line Internet Protocol
SMA
Services Management Adaptor
SML
Service Management Level in the TMN model.
SMS
Short Message Service
SNMP
Simple Network Management Protocol
Standard protocol used to manage and control IP gateways and the networks to which they are attached.
SNR
Signal-to-noise ratio
SONET
S
ynchronous Optical Network
Space Diversity
A protection mode.
The main and standby radios are set up in Hot Standby mode, but are connected to their own antennas. Both
antennas, separated by a specific distance, are receiving the signal transmitted from the online radio at the other
end of the link. If a fault occurs in the receiving end of the link, the traffic is switched to the standby radio
without causing errors (hitless receive switching). As in Hot Standby mode, a fault detected in the online
transmitter causes that transmitter to mute and the standby radio to unmute.
SQL