Power over Ethernet (POE) is a technology for wired LANs that allow the network cable to carry electrical power. This allows for the connection of network devices and also minimizes the number of wires used to install the network.
A patch (or fix) refers to software that serves as a quick repair job to resolve functionality issues, improve security, and add new features to an operating system or a piece of programming. They are often temporary fixes until the developer packages the newer updates for the operating system or software.
PCI Compliance refers to a set of security standards enforced by the PCI Standards Council that applies to all companies that accept, process, store or transmit credit card information to maintain a secure and uniform transaction environment.
A private branch exchange (PBX) is a private telephone network used within an organization or company and enables users to communicate both internally and externally using various communication channels like VoIP, ISDN or analog. PBXs are used to assign internal extensions, manage voice mail etc.
Platform as a Service is offered within cloud computing solutions and provides hardware and software tools usually needed for developing and launching an app which allows users to run, and control applications over the internet without the complexity of establishing and maintaining the infrastructure themselves.