VoIP Business Phone Systems - SIP Handsets
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An introduction to SIP

SIP (Session Initiation Protocol) SIP stands for Session Initiation Protocol and is a worldwide established communication standard used in VoIP telephony. SIP controls how an internet call is established and how voice data is transferred during that call, as well as the termination of the connection. A session is simply an exchange or transfer of

An introduction to VoIP

VoIP (Voice over Internet Protocol) VoIP means Voice over Internet Protocol (also generally known as IP Telephony) and is an alternate way of making calls. Traditional phone calls are made over a landline are fed by a copper wire from your premises to a local telephone exchange. VoIP calls are not made over traditional landlines,