- Tech know how online

digital subscriber line access multiplexer (DSLAM)

The Digital Subscriber Line Access Multiplexer (DSLAM) is a switching device used to multiplex several hundred DSL connections from the backbone network into upstream and downstream.

The DSLAM multiplexes the individual DSL data streams from the high bit-rate data streams of the optical networks, usually 155 Mbit/s from ATM. In addition to the central ATM architecture, DSLAM can also be implemented as a decentralized IP-based architecture.

Multiplexing of the DSLAM from 155 Mbit/s to several hundred DSL lines

Multiplexing of the DSLAM from 155 Mbit/s to several hundred DSL lines

DSLAMs are located in local exchanges and serve several hundred copper-based digital subscriber lines (DSL) connected to the end customer via copper twisted pairs. For distance reasons, however, they can also be located in cable branches or installed in houses. They are then referred to as outdoor DSLAMs and indoor DSLAMs. DSLAM has an energy-saving mode that puts the modems into sleep mode during inactive periods, thus saving energy.

The section of the network between DSLAM and the handover point in the IP network is called the second mile. With DSLAM, the existing public telephone network can be expanded into a network that supports multiple services: Voice over IP( VoIP), video on demand( VoD), and Internet access at high data rates.

Englisch: digital subscriber line access multiplexer - DSLAM
Updated at: 28.05.2013
#Words: 198
Links: digital subscriber line (DSL), backbone (BB), network, upstream, downstream
Translations: DE

All rights reserved DATACOM Buchverlag GmbH © 2024