VoIP - Voice over Internet Protocol (also called IP Telephony, Internet telephony and Digital Phone) is the routing of voice conversations over the Internet or any other IP-based network.
SIP - Session Initiation Protocol - is a protocol developed by the IETF MMUSIC Working Group proposed standard and to initiate, modify and complete an interactive user session that involves multimedia elements, such as video, voice, instant messaging, online games and virtual reality.
PSTN - public switched telephone network - is the concentration of public networks of circuit-switched world, like the Internet is the concentration of global public network packet-switched and IP-based.
ISDN - Integrated Service Digital Network - is a type of telephone system of circuit-switched network designed to enable the digital transmission (as opposed to analog) voice and data over copper telephone wires common, which means better quality and faster than the available with analogue systems.
PBX - Switchboard (also known as the Telephone for Private Business) - is a telephone exchange owned by a private company, as opposed to the plant that is owned by a telecommunications operator or a telephone company.
IVR - in telephony, interactive voice response - is a computer system that allows a person, typically the caller on the phone, please select from a menu of voice and interface with a computer system.
DID - Direct Dialing internal (also called DDI in Europe) is a feature offered by phone companies for use with the switchboard of its clients through which the telephone company assigns a range of issues connected to the switchboard of his client.
RFC - Request for comments (the plural is Requests for comments, in which case its acronym in English are RFCs) is one in a series of briefing papers numbered Internet standards and that both commercial and freeware software on the Internet and communities Unix still widely.
Tags: interactive voice response, IVR, PBX, public switched telephone network, session initiation protocol, SIP, voice over internet protocol
