Axis 0767-001-EOL Axis C3003-E User Manual

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AXISC3003-ENetworkSpeaker

VoiceoverIP(VoIP)

PortSettings

•SIPport–EntertheportusedforSIPsessions.Thesignallingtrafcthroughthisportwillbenon-encrypted.Thedefault

portnumberis5060.

•SIPTLSport–EntertheportusedforSIPSsessionsandTLS-securedSIPsessions.Thesignallingtrafcthroughthisport

willbeencryptedusingTransportLayerSecurity(TLS).Thedefaultportnumberis5061.

NetworkAddressTranslation(NAT)Traversal(portforwarding)

UseNATtraversalwhentheAxisproductisconnectedtothenetworkbehindaNATrouterorrewalldevice.

VoIPservicesrequireclientstobeserversaswell,andmanyVoIPservicescarryIPaddressandportinformationintheapplication

data.Therefore,AxisproductsbehindNetworkAddressTranslation(NAT)devicessuchasnetworkroutersneedtousespecial

protocolsforNATtraversal(portforwarding)sothatincomingcallscanbelinkedtothecorrecthost.

WithoutSIP-specicportforwarding,usersofclientswithinthesameprivatenetworkwouldbeabletotalktoeachother

(peer-to-peercommunication)butusersofclientsindifferentnetworkswouldnot.

ThefollowingNATtraversalsettingsareavailable:

•ICE–InteractiveConnectivityEstablishment(ICE).Seepage13.

•STUN–SessionTraversalUtilitiesforNAT(STUN).Seepage13.

•TURN–TraversalUsingRelaysaroundNAT(TURN).Seepage13.

EachNATtraversalprotocolhasitsbenetsandaws.Theawscanbereducedbymakingsurethatthenetworkanditsconnected

devicessupportalltheseprotocols.

Formoreinformationabouttheproduct’sgeneralNATtraversalsettings,seeNATtraversal(portmapping)forIPv4onpage27.

InteractiveConnectivityEstablishment(ICE)

InteractiveConnectivityEstablishment(ICE)enablestheproducttosendarequestthatincludesmultipleaddressestothereceiving

device.Initsresponse,thereceivingdevicealsoincludesmultipleaddresses.Throughaprocessofconnectivitychecks,alsocalled

handshakes,thechannelforcommunicationisestablished.

ICEincreasesthechancesofndingthemostefcientpathtosuccessfulcommunicationbetweenpeerdevices.Ifyoualsoenable

STUNandTURN,youimprovetheICEprotocol’schancesofndingthemostefcientpathtosuccessfulcommunication,notjust

betweenpeersbutbetweenalldevicesoneithersideoftheNATdevice.

TousetheICEprotocolforNATtraversal,selectEnableICE.

SessionTraversalUtilitiesforNAT(STUN)

SessionTraversalUtilitiesforNAT(STUN)isaclient-servernetworkprotocolthatenablestheproducttoaskaSTUNserveronthe

InternetforamappedpublicIPaddress.TheSTUNserverresponseincludesthisIPaddressandportsothattheclientcanusethem

initsSIPmessagestootherhostsandclients.

LikeTURN,STUNcanbeusedinfull-cone,address-restrictedcone,andport-restrictedconeNATsetups.STUNisfastbecauseit

islightweight.However,STUNdoesnotallowincomingmessagesfromsymmetricNATs,anditcannotcommunicatewithapeer

behindthesameNATdevice.

TousetheSTUNprotocolforNATtraversal,selectEnableSTUN.ThenentertheaddressoftheSTUNserver.

TraversalUsingRelaysaroundNAT(TURN)

TraversalUsingRelaysaroundNAT(TURN)isaclient-servernetworkprotocolthatenablestheproducttoaskaTURNserverfora

mappedIPaddress.TheTURNserverrespondswithitsIPaddressandportsothattheclientcanusetheminitsSIPmessages.

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Axis 0767-001-EOL C3003-E Network Horn Speaker 0767-001