User's Manual

LOS
Line of Sight
(Free Space)
An unobstructed straight line between two transmitting devices.
The transmission path is not established by nor dependent upon
reflection, refraction or diffraction. As long as 60 per cent of the
first Fresnel zone is clear, then it may be considered almost
equivalent to LOS transmission.
Link budget
The amount of power, expressed in decibels, needed for a radio
link to work.
Linktest
A method of proving a new radio link or troubleshooting an
existing one. Linktest sends data packets in both directions and
accumulates statistics on the data that indicate how well the link
works.
11.10 M
MAC address
Media Access Control address. Alphanumeric characters that
uniquely identify a network-connected device.
Management
Port
The DB-9 port on the I DU to which a PC may be attached.
Manager
This element is installed on the network’s host computer and is
controlled by the network administrator when used in SNMP. From
the host, the manager configures agents, or polls agents for
information.
MIB
Management I nformation Base. A set of commands that you can
execute using the SNMP Manager to access the MIB database. A
standard MIB and a EION-customized MI B store information
relevant to the operation of a wireless network.
Multipath
Interference
As a radio signal travels, it may reflect off objects in the
environment and take various paths to the receiver. As a result,
the signal arrives at the receiver at different times, confuses the
receiver, and causes bit errors and processing delays. A related
type of interference is multipath fading, in which a reflected signal
shifts out of phase with the original signal and cancels it.
11.11 N
Near Line of
Sight (NrLOS) :
Suburban
NrLOS is a visually-obstructed line of sight between two
transmitting devices but a straight line can still be drawn between
them. Any combination of reflection, refraction and diffraction on a
direct ray between the transmitter and receiver may have
occurred.
Non Line of
Sight (NLOS) :
Dense Urban
No line can be drawn between two transmitting devices. Total
visual blockage has occurred between the transmitting and
receiving devices. Extremely large amounts of reflection, refraction
and diffraction can occur on a direct ray between the transmitter
and receiver.
LibraPlus 5860 User Guide Appendix B: Def initions: M Page 84 of 95