Installation guide
Glossary
Rev 4 Mar.11 59
roaming Acellularsubscriberisinanareawhereserviceisobtained
fromacellularserviceproviderthatisnotthesubscrib er’s
provider.
SMS Shortmessageservices—Afeaturethatallowsusersofa
wirelessdeviceonawirelessnetworktoreceiveortransmit
shortelectronicalphanumericmessages(upto160characters,
depending
ontheserviceprovider).
system tray Usuallylocatedinthelowerrightcornerofyourscreen,orthe
TodayscreenofPocket PCs.Alsoknownasthe(Windows)
statusarea.
TCP TransmissionControlProtocol—Thecommonunderlying
communicationprotocolusedontheInternet.Aconnection
handshakeestablishesapointtopointlogicalconnection.In
contrasttoUDP,TCPensuresbothendsoftheconnectionare
presentandactiveonthenetwork.
TCPensuresdeliveryof
datagrams.
TDD TelecommunicationsDevicefortheDeaf.SeeTTY
TIA TelecommunicationsIndustryAssociation—Astandards
settingtradeorganization,whosemembersprovidecommuni‐
cationsandinformationtechnologyproducts,systems,distri‐
butionservicesandprofessionalservicesintheUnitedStates
andaroundtheworld.Consult
www.tiaonline.org.
TTY TeleTYpe—Referingtoearlywirelinedataterminals,itnow
appliestodevicesusedtoaidhearingandspeechimpaired
peopletousethetelephonesystem.
UDP UserDatagramProtocol—Alowoverhead,connectionless,
packetdeliveryIPprotocol.UnlikeTCP,UDPdoesnot
guaranteedeliveryofdatagrams.
VPN VirtualPrivateNetwork
WiFi WirelessFidelity—a
high‐frequencywirelesslocalarea
network(WLAN),knownas802.11.