
ConnectionServer
TheConnectionServeristhecomponentthatclientslogintoinordertosendandreceivefaxes,and
administratorsconnecttoinordertomanageuseraccounts,inboundDIDroutingassignments,andsendrouting
rules.Itprovidessessiontracking,authentication,quotaandusagetrackingfunctions.
PortServer
ThePortServeristhecomponentthatfacilitatesSIP+T.38“VoIPFax”connectionswithmediagateways.Client
softwareinteractswiththeportserverusingHTTPorHTTPSconnections,usingareal‐timeprotocolthatisbetter
abletohandledelayscomparedtoapureT.38connection.ThemoretimingsensitiveT.38protocol
isonly
implementedbetweentheportserverandthemediagateway.Althoughclientsinteractdirectlywiththeport
server,theportserverdoesnotmaintainalistofaccounts.Sendandreceiveconnectionsarealwaysinitiatedfirst
betweentheconnectionserverandtheportserver,resultinginaunique“session
id”.Theportserverwillonly
interactwithclientsthatcanproducethissessionid.
HttpsProxy
TheHTTPSProxyisthecomponentthatenablesclientaccesstotheConnectionandPortServerssecurelyacross
theopenInternet.TheHTTPSProxyisanASP.NET2.0applicationhostedonanIISserver.
ImplementationOverview
WhichComponentsAreNeeded?
ThefewestcomponentsrequiredarejusttheConnectionServerandthePortServer.Thiswillallowsendingand
receivingoffaxesoverunsecuredHTTPthroughtheportservertoaT.38mediagateway.
ItisnotrecommendedtoputthePortServerdirectlyontheInternet.TheHTTPSProxyisused
toprovideInternet‐
accessiblesecurecommunication.
ImplementationPatterns
TherearethreegeneraltypesofNETSatisFAXtionIPPortServerinstallations.
SingleServer(Consolidated)
Figure2‐2:SingleServerInstallation
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