User's Manual

C1_Configuration_Manual_-_fm_1.0.0.1.doc

Commercially Confidential

EIRP Effective Isotropic Radiated Power: Term for the expression of the performance of an

antenna in a given direction relative to the performance of a theoretical (isotropic) antenna and is

expressed in watts or dBW. EIRP is the sum of the power sent to the antenna plus antenna

gain.

encryption The conversion of information into a scrambled form that effectively disguises it

to prevent unauthorized access. Every encryption scheme uses some well-defined algorithm,

which is reversed at the receiving end by an opposite algorithm in a process known as

decryption.

Ethernet Baseband LAN specification invented by Xerox Corporation and developed jointly

by Xerox, Intel, and Digital Equipment Corporation. Ethernet networks use CSMA/CD and

run over a variety of cable types at 10 Mbps. Ethernet is similar to the IEEE 802.3 series of

standards.

FastRoaming

The Trapeze Mobility System feature that quickly hands off a roaming user's

credentials. Mobility Exchanges in a Trapeze Mobility Domain pass each other this vital user

information to permit seamless roaming. This allows 802.1X and non-802.1X,

MAC-authenticated devices, such as 802.11 phones, to roam quickly between Mobility

Exchanges.

FCC Federal Communications Commission: U.S. government agency that supervises, licenses,

and controls electronic and electromagnetic transmission standards. The FCC Rules in Title 47

of the Code of Federal Regulations govern telecommunications in the United States. Wireless

LANs must comply with Part 15 of the FCC rules, which are written specifically for RF devices.

firmware Software instructions set permanently or semipermanently in ROM.

FHSS Frequency Hopping Spread Spectrum: One of two types of spread spectrum radio

technology used in wireless LAN (WLAN) transmissions. The FHSS technique modulates the

data signal with a narrowband carrier signal that “hops” in a predictable sequence from

frequency to frequency as a function of time over a wide band of frequencies. Interference is

reduced, because a narrowband interferer affects the spread spectrum signal only if both are

transmitting at the same frequency at the same time. The transmission frequencies are

determined by a spreading (hopping) code. The receiver must be set to the same hopping code

and must listen to the incoming signal at the proper time and frequency to receive the signal.

FPGA Field Programmable Gate Array: An FPGA is a specially made digital semiconductor

often used for prototyping. With an FPGA, a design engineer is able to program electrical

connections on site for a specific application, without paying thousands of dollars to have the

chip manufactured in mass quantities.

FTP File Transfer Protocol: Defined in RFC 959, it is a Application protocol that is part of the

TCP/IP protocol stack, used for transferring files between network nodes.

gateway In the IP community, an older term referring to a routing device. Today, the term

router is used to describe nodes that perform this function, and gateway refers to a

special-purpose device that performs an application-layer conversion of information from one

protocol stack to another.

handoff The process of transferring the handling of that cellular call to the new base station.