Specifications

Introduction,Licensing,Support
Whatis3CXPhoneSystemforWindows?
3CXPhoneSystemisasoftwarebasedPBXforWindowsthatworkswithSIPstandardbasedIP
Phones,SIPtrunksandVoIPGatewaystoprovideafullPBXsolution–withouttheinflatedcostand
managementheadachesofan‘oldstyle’PBX.TheIPPBXsupportsalltraditionalPBXfeaturesbut
alsoincludesmanynewmobilityandproductivityfeatures.AnIPPBXisalsoreferredtoasaVoIP
PhoneSystem,IPPBXorSIPserver.
Calls are sent as data packets over the computer data network instead of the traditional phone
network.Phonessharethenetworkwithcomputerssonoseparatephonewiringisrequired.With
theuseofaVoIP/PSTNgateway,youcanconnectexistingphonelinestotheIPPBXtomakeand
receivephonecallsviaaregularPSTNline.YoucanalsouseaVoIPProvider,whichremovesthe
requirementforagateway.
3CX Phone System interoperates with standard SIP softphones, IP phones or smartphones, and
provides internal call switching, as well as inbound and outbound calling via the standard phone
networkorviaaVoIPservice.
HowanIPPhoneSystemWorks
AVoIPPhoneSystemgenerallyconsistsoftheIPPBXserver,oneormoreSIPbasedphonesand
aVoIP/PSTNGatewayoraVoIPserviceprovider.TheIPPBXserverissimilartoaproxyserver.
SIPclients,beingeithersoftphonesorhardwarebasedphones,registerwiththeIPPBXserver.
WhentheywishtomakeacalltheyasktheIPPBXtoestablishtheconnection.TheIPPBXhasa
directoryofallphones/usersandtheircorrespondingSIPaddressandconnectsaninternalcallor
routesanexternalcallviaeitheraVoIP/PSTNgatewayoraVoIPserviceprovider.
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FigureVoIPPhoneSystemOverview
TheimageillustrateshowanIPPBXintegrateswiththenetworkandhowitusesthePSTNand/or
theInternettoconnectcalls.