MSAN - Multi-Service Access Nodes

Derrick

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A Multi-service access Node (MSAN) also known as a Multi-service access gateway (MSAG) 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.

Prior to the deployment of MSANs, telecom providers typically had a multitude of separate equipment including DSLAMs to provide the various types of services to customers. Integrating all services on a single node, which typically backhauls all data streams over IP or Asynchronous Transfer Mode can be more cost effective and may provide new services to customers quicker than previously possible.

A typical outdoor MSAN cabinet consists of narrowBand (POTS), broadBand (xDSL) services, batteries with rectifiers, optical transmission unit and copper distribution frame.

Source: Wikipedia
 
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