A Voice over Internet Protocol (VoIP) private box exchange (PBX) is a business telephone system that provides services similar to a standard PBX, but does so over a company’s LAN or WAN data network rather than through the circuit-switched networks used by the traditional Public Switched Telephone Network (PSTN).
Also referred to as an IP PBX, VoIP PBX systems can typically switch calls between VoIP on local lines or between VoIP and traditional telephone users in the same way a PBX does. A VoIP PBX system can be hardware based or can function entirely as a software system.
See The Difference Between VoIP and PSTN Systems in the Did You Know? section of
- VoIP service provider
A voice over Internet Protocol (VoIP) service provider offers VoIP Internet telephony solutions to residential and commercial customers. Also known as an Internet phone service provider, a VoIP service provider generally provides the VoIP hardware and services to subscribers at a monthly rate, although hosted VoIP services are also quite common. As with all VoIP […]
- VoIP Phone
VoIP phones utilize packet-switched Voice over Internet Protocol (VoIP), or Internet telephony, to transmit telephone calls over the Internet as opposed to the circuit-switched telephony used by the traditional Public Switched Telephone Network (PSTN). The advantage to VoIP phone calls is that unlike regular long-distance calls, phone calls made through a VoIP phone service are […]
- VoIP telephone
Voice over Internet Protocol, or VoIP, telephone products connect to VoIP, or Internet telephony, systems, which use packet-switched telephony to transmit calls over the Internet as opposed to the circuit-switched telephony used by the traditional Public Switched Telephone Network (PSTN). VoIP telephones look and largely function like standard phones, but they have built-in IP technology […]
- volatile memory
Memory that loses its contents when the power is turned off. All RAM except the CMOS RAM used for the BIOS is volatile. ROM, on the other hand, is nonvolatile.
The tape volume serial number or VOLSER is the method used to uniquely identify a tape volume. The VOLSER is specified in the tape label, which is the first set of information contained on the tape. [Source: Audit Serve]