User guide

Glossary
Document 2131144. Rev 1.0 Jun.09 51
roaming Acellularsubscriberisinanareawhereserviceisobtained
fromacellularserviceproviderthatisnotthesubscri b er’s
provider.
SMS Shortmessageservices—Afeaturethatallowsusersofa
wirelessdeviceonawirelessnetworktoreceiveortransmit
shortelectronicalphanumericmessages(upto160characters,
depending
ontheserviceprovider).
TIA TelecommunicationsIndustryAssociation—Astandards‐
settingtradeorganization,whosemembersprovide
communicationsandinformationtechnologyproducts,
systems,distributionservicesandprofessionalservicesinthe
UnitedStatesandaroundtheworld.Consult
www.tiaonline.org.
VPN VirtualPrivateNetwork