Shared DSL User Guide EDA Remote Shared Site EDA Network Management Traffic Broadband Network DSLAM Router/ BRAS Subscriber Traffic Data Network
Shared DSL User Guide EDA . Copyright © Ericsson AB 2004, 2006 - All Rights Reserved Disclaimer No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document.
. Contents 1 Introduction to this Guide 1 1.1 Revision History 1 2 The Shared DSL Solution 2 2.1 Shared DSL Concept 2 2.2 Services 4 2.3 End-users Layer two Separation 4 3 Router Role 5 4 The Remote Site 6 4.1 Remote Site Elements 6 4.2 Environment 8 4.
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Introduction to this Guide 1 Introduction to this Guide This guide describes the Shared DSL solution, and explains how to use it. The guide is a combination of a solution description and a user’s guide. It is possible to read the guide without former knowledge of the EDA system. However, it is recommended to read the EDA System Overview in order to completely understand the concept.
The Shared DSL Solution 2 The Shared DSL Solution The Shared DSL solution is a new, cost effective, and secure way of unbundling DSL, when the primary Access Provider is not the owner of the EDA network. The secondary Access Provider (who owns the EDA network) simply extends the EDA network through the primary Access provider network. The Shared DSL solution is targeted towards data services like Internet Access. 2.
The Shared DSL Solution The concept of the Shared DSL is using one DSL line inside the Primary Access Provider network, terminating the line with a Customer Premises Equipment (CPE) modem that converts the DSL to Ethernet. The Ethernet is then converted again to DSL by the IP DSLAM to make the DSL connection to the End-users (this part belongs to the secondary Access Provider).
The Shared DSL Solution 2.2 Services Up to seven services can be offered to the End-users of each remote site, if the Primary Access Provider’s DSLAM and network supports it (eight PVCs together with the Management channel). However, since there is no Quality of Service differentiation between the different services, they can only be used to enable End-users to use different Service Providers. 2.
Router Role 3 Router Role The Router or BRAS plays an important role in the Shared DSL concept, and must perform the following functions: • DHCP requests from the IP DSLAM in the remote site must be relayed towards the EDA network, using the management VLAN ID. • The Management PVC from the remote site must be mapped to the EDA Management VLAN. • If PPPoE or PPPoA is used for the END-user traffic, it must be terminated by the BRAS.
The Remote Site 4 The Remote Site The Remote site is the extension of the EDA network. The Shared DSL solution does not specify the full extent of the site, only the minimum required functionality and basic elements. 4.
The Remote Site Figure 3 on page 7 illustrates a remote site for 12 End-users, using the EDN312, which has a built-in filter.
The Remote Site 4.2 Environment It is recommended to take some security measures for the site to prevent tampering with the equipment (for example a locked cabinet). The ambient temperature around the equipment must be within 0 – 45 ºC. The relative humidity must be within 5% - 95%, non condensing. 4.3 Configuring the CPE Modem The CPE Modem must be configured to map the VLANs used by the IP DSLAM to PVCs towards the Central Office (see Figure 4 on page 8).
Acronyms and Abbreviations Acronyms and Abbreviations ADSL Asymetric Digital Subscriber Line PPPoE Point to Point Protocol over Ethernet ATM Asynchronous Transfer Mode PVC Permanent Virtual Circuit BRAS Broadband Remote Access Server VCI Virtual Channel Identifier CPE Customer Premises Equipment VPI Virtual Path Identifier DSL Digital Subscriber Line VPN Virtual Private Network L2TP Layer Two (2) Tunneling Protocol PPPoA Point to Point Protocol over ATM 1/1553-HSC 901 86/1 Uen A 2006-02-21 9
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