Support User Manuals

Telos Zephyr Xstream Two-Way Radio User Manual

Open as PDF

of 381

USER’S MANUAL

Appendix 10 – Glossary 353

IGMP(InternetGroupManagementProtocol)isacommunicationsprotocolusedtomanage

themembershipofInternetProtocolmulticastgroups.IGMPisusedbyIPhostsandadjacent

multicastrouterstoestablishmulticastgroupmemberships.IGMPisusedbyLivewire

TM

to

managemulticastaudiostreams.

ILEC–IncumbentLocalExchangeCarrierAlocalExchangeCarrierwhichenteredthe

marketplacebeforetheenactmentofthe1996Telecomact;.i.e.atelephonecompanywhichis

neitheranIndinoranRBOC.SeeLECandCLEC.

IMUXSeeInverseMultiplexing

InBandSignalingAsignal

ingsystemwherenetworkinformationsuchasaddressandrouting

informationarehandledoverthecommunications(voice)pathitself.Usuallytheinformationis

representedintheformofaudibletones,howeverDCloopcurrentsignalingalsoqualifiesasIn

BandSignaling.SeealsoCCIS.

IncumbentLocalExchangeCarrierSeeILEC.SeealsoCLEC&LE

C

IndependentAnyofthephonecompaniesinexistenceatthetimeofdivestiturethatwerenot

affiliatedwiththeBellSystem.SeeRBOC,LEC,andCLEC.

IndiSeeIndependent.

InterconnectCompanyAvendoroftelecommunicationsCPEotherthanaBOCorAT&T.This

termwasoriginatedbyAT&Tandwasmeanttobederisivetowa

rdsthefledglingindustrywhen

thecourtssaiditwasOKforenduserstobuyequipmentfromsomeoneotherthantheBell

System.Thisindustryflourished,inspiteofAT&T’sdisdain,andironically,theRBOCswerenot

allowedtosellCPEu

nderthetermsofthebreakupofAT&T.Withthecurrentstateof

deregulation,theRBOCsareslowlyre‐enteringthisbusiness.

InterexchangeCarrierSeeIEC

InterworkTheabilityoftwodifferenttypeofnetworkstocommunicateseamlessly.For

example,ISDNcaninterworkcallstoboththePOTSnetworkandtheSwitche

d‐56network.

InversemultiplexingAmethodofbreakingapartandlatercombining2datastreamsthatdoes

notinvolvethetelephonenetwork.Inversemultiplexingisthemostcommonwayofachieving

thisfunctioninCodecsoperatingat112or128kbpsoverISDN.

IOCCapabilityPackagesISDNOrderingCodesystem.Thissystemwasdevisedbyth

eNational

ISDNUser’sForumandBellcoretosimplifyorderingnewISDNlinesintheUSAandCanada.

Usingasinglecodespecifiesalllinespecifications.TheTelosZephyr,ZephyrExpress,TWO,and

TWOx12supportIOCpackage“S”.SearchfordocumentNIUF428‐94atNIUF’swebpage

http://www.niuf.nist.gov/formorein

formation.

ISDNIntegratedServicesDigitalNetwork‐Arelativelynewandhighlyflexibletypeoftelephone

servicewhichallowsdialingondigitalchannelswithmultiplebi‐directional“Bearer”channels

eachwithacapacityof56or64Kbpsandasinglebi‐directional“Dchannel”.SeeBRIandPRI.

ISDNPr

otocolThe“language”usedforcommunicationbetweentheTelco’sswitchandthe

customer’sTerminalAdapter.EachISDNcircuithasoneprotocol,andtheprotocolhasnoeffect

onwhereorwhomonemaycall.SeeETS300,NationalISDN,andCustomISDN.

ISDN2AtermusedinEuropeforISDNBRI.Alsocall

edS׎.NottobeconfusedwithNational

ISDN‐2.SeeBRI.

previous next