User guide

The EDA Concept
4 1/1551-HSC 901 35/3 Uen C 2005-12-02
2.2 The EDA System – Basic Principle
The basic principle of the EDA System is illustrated below in Figure 1 on
page 4.
The end-users are connected to the EDA network through the IP DSLAM.
The IP DSLAM is connected to an aggregation node, which provides layer-
2 Ethernet switching and subsequently connects the end-users to various
IP services through the EDA access network. The EDA system is managed
by the EDA Management System called Public Ethernet Management
(PEM).
The EDA system supports base band POTS, base band ISDN and
telephony over IP. Telephony over IP, and one base band telephony, either
POTS or ISDN, may coexist within a single EDA system and each end-user
can be allowed to access any of the applications, including all in parallel.
The EDA system can interface to any local exchange. The IP DSLAM
separates ADSL signals from base band signals, and base band signals
(telephony) are sent to the local exchange.
The EDA system can be extended to create different types of multi-service
network architectures. For example by adding a broadband remote access
server (BRAS), authentication, authorization and accounting (AAA) can be
provided. Please note that neither BRAS nor telephony over IP is part of
the EDA solution.
Figure 1 The EDA Concept Basic Principle