Virtual Private LAN Service (VPLS) allows different sites to communicate as if they are connected
to the same LAN. Service providers offer simplified “any to any” (or “multipoint-to-multipoint”)
VPLS service to enterprise customers, allowing enterprises to focus on their core business.
In addition, broadband network operators can use VPLS to efficiently distribute “point-tomultipoint”
traffic such as IPTV to multiple subscribers concurrently.
Autonomous System (AS)
An autonomous system (AS) is a collection of connected Internet Protocol (IP) routing prefixes under the control of one or more network operators that presents a common, clearly defined routing policy to the Internet.
Multi-Service Access Node (MSAN)
A 'Multi-Service access node' or (MSAN) also known as MSAG or 'Multi-Service Access Gateway' is a device typically installed in a telephone exchange (although sometimes in a roadside serving area interface cabinet) which connects customers' telephone lines to the core network, to provide telephone, ISDN, and broadband such as DSL all from a single platform.
Broadband Remote Access Server (BRAS)
A Broadband Remote Access Server (BRAS, B-RAS or BBRAS) routes traffic to and from the Digital Subscriber Line Access Multiplexers (DSLAM) on an Internet service provider's (ISP) network.
Digital Subscriber Line Access Multiplexer (DSLAM)
A Digital Subscriber Line Access Multiplexer (DSLAM) allows telephone lines to make faster connections to the Internet. It is a network device, located in the telephone exchanges of the service providers, that connects multiple customer Digital Subscriber Lines (DSLs) to a high-speed Internet backbone line using multiplexing techniques.
Asymmetric Digital Subscriber Line (ADSL) is one form of the Digital Subscriber Line technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. At the telephone exchange the line generally terminates at a DSLAM where another frequency splitter separates the voice band signal for the conventional phone network.
Digital Loop Carrier (DLC)
A Digital Loop Carrier (DLC) is a system which uses digital transmission to extend the range of the local loop farther than would be possible using only twisted pair copper wires. A DLC digitizes and multiplexes the individual signals carried by the local loops onto a single datastream on the DLC segment.