User's Manual Part 2

332 APCD-LM043-8.0 (DRAFT C)
Appendix M: Acronyms and Glossary
Radio Module The device in the EUM (or CCU) that provides the wireless
interface to the LMS network. The radio module performs
signal spreading and modulation, channelization, up-
conversion and amplification in the transmit direction, and
signal amplification, down-conversion, channel selection,
demodulation, de-spreading and data recovery in the receive
direction.
Range The maximum distance that a signal can be reliably
transmitted between a CCU and EUM.
RIP (Routing Information
Protocol)
A routing protocol in which network routers periodically
broadcast their entire current routing database.
Router A network device that routes IP messages from one physical
port to another based on a table of routes that are manually
entered by a crafts person (static routes) or generated by the
router using a routing protocol such as RIP or OSPF.
Routing The process of finding a path to a destination host through an
IP network.
Sectorization An RF engineering technique whereby co-located transceivers
are connected to separate antennas with different but
geometrically arranged azimuths, for the purpose of optimizing
radio frequency reuse, extending range, and reducing
interference. 120° sectorization is commonly applied in LMS
systems.
SNMP (Simple Network
Management Protocol)
A protocol used to manage nodes in an IP network.
SNMP Agent An agent resides on an SNMP-managed device, and performs
operations when requested to do so by an SNMP manager.
SNMP Community A grouping of SNMP agents that can be managed by an
SNMP manager. An SNMP manager can manage more than
one SNMP community. The community name is used to
authenticate the SNMP manager before allowing it access to
the agent.
SNMP MIB (Management
Information Base)
The information that an SNMP manager, such as the NMS,
can request from an SNMP agent.
SNMP Trap A message sent by an SNMP agent to an NMS, console, or
terminal to indicate the occurrence of a significant event, such
as a specified condition, or a defined threshold that was
reached.
SNMP Trap Server The server to which SNMP trap messages are forwarded.
SNTP (Simple Network
Time Protocol)
A feature that provides LMS4000 devices with an accurate
time clock for time stamping events in a log file.
Term Definition