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Packet Switching is the ability of a network, or more precisely network equipment, to forward packets based on packet header or label information.

Private Branch Exchange

The Peak Information Rate or PIR specifies the maximum rate over the Committed Information Rate or CIR at which traffic is allowed into the network (ingress).

Power over Ethernet, or PoE, is a standard that delivers power to network devices, in addition to Ethernet data packets.

Point to point indicates a network connection between to distinct systems or end points.

A Primary Rate Interface, or PRI is a standards based telecommunications service for transporting multiple DS0 voice and data streams between a user and network. A subset of the ISDN or Integrated Services Digital Network specification, and implemented on E1 & T1 lines, PRI is the standard for delivering telecom services to business locations. On T1 lines operating at 1.544 Mbps, PRI provides 23 B channels (for user data) and 1 D channel (for control and signaling).

Private Branch Exchange or PBX is a telephone system that serves a particular business or office, facilitating connections for internal telephones, connecting them to the Public Switched Telephone Network or PSTN via trunk lines.

A network device owned by a provider that offers an initial, first level of network traffic aggregation for many customer edge or CE devices.

A figurative term describing a packet carrying leased line or a virtual circuit enabling communication between two customer network end points.

Public Switched Telephone Network or PSTN sometimes referred to as Plain Old Telephone Service or POTS is the network of worldwide public circuit-switched telephone networks. It is comprised of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables connected by switching centers, which allows any telephone in the world to communicate with any other. Originally a network of fixed-line analog telephone systems, the PSTN is now nearly all digital in its core.