Axis 02409-001 User Manual

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AXISI8116-ENetworkVideoIntercom

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VoiceoverIP(VoIP)

VoiceoverIP(VoIP)isagroupoftechnologiesthatenablesvoicecommunicationandmultimediasessionsoverIPnetworks,suchas

theinternet.Intraditionalphonecalls,analogsignalsaresentthroughcircuittransmissionsoverthePublicSwitchedTelephone

Network(PSTN).InaVoIPcall,analogsignalsareturnedintodigitalsignalstomakeitpossibletosendthemindatapackets

acrosslocalIPnetworksortheinternet.

IntheAxisproduct,VoIPisenabledthroughtheSessionInitiationProtocol(SIP)andDual-ToneMulti-Frequency(DTMF)signaling.

Example

WhenyoupressthecallbuttononanAxisintercom,acallisinitiatedtooneormorepredenedrecipients.Whenarecipientreplies,

acallisestablished.ThevoiceandvideoistransferredthroughVoIPtechnologies.

SessionInitiationProtocol(SIP)

TheSessionInitiationProtocol(SIP)isusedtosetup,maintainandterminateVoIPcalls.Youcanmakecallsbetweentwoormore

parties,calledSIPuseragents.TomakeaSIPcallyoucanuse,forexample,SIPphones,softphonesorSIP-enabledAxisdevices.

TheactualaudioorvideoisexchangedbetweentheSIPuseragentswithatransportprotocol,forexampleRTP(Real-Time

TransportProtocol).

Youcanmakecallsonlocalnetworksusingapeer-to-peersetup,oracrossnetworksusingaPBX.

Peer-to-peerSIP(P2PSIP)

ThemostbasictypeofSIPcommunicationtakesplacedirectlybetweentwoormoreSIPuseragents.Thisiscalledpeer-to-peerSIP

(P2PSIP).Ifittakesplaceonalocalnetwork,allthat’sneededaretheSIPaddressesoftheuseragents.AtypicalSIPaddressinthis

casewouldbesip:<local-ip>.

Example

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Axis 02409-001 I8116-E Black Network Video Intercom