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EDA 1200 Services

3 EDA 1200 Services

EDA 1200 is a versatile and flexible access system that can be designed to fit

various requirements for service access functionality, network architecture, and

network performance. Furthermore, the EDA 1200 system solution can be

adapted to various requirements regarding network scalability and redundancy.

This section gives an overview of the services that can be provided by the

EDA 1200 system.

3.1 Service Access

End-users are connected to Service Providers through an access network.

The access network consists of two parts: the local loop and the aggregation

network.

In other contexts, the local loop is often called “first mile” or “subscriber line”.

It is the part of the access network that interconnects the End-user premises

with the aggregation network, where it is terminated in an Access Node. The

aggregation network represents the part of the access network between the

Access Nodes and one or more Edge Nodes. An Edge Node can be a service

gateway or a server.

An EDA 1200 Service is defined as a set of rules for how a specific part of the

End-user traffic is handled through the access network. In effect, these rules

are primarily enforced in the EDA 1200 Access Nodes. The rules are applied to

each Ethernet frame, enabling End-users to access specific service gateways

or servers, with the desired quality.

A key requirement for an aggregation network is to ensure that the End-user

can access the services for which the End-user is authorized. In traditional

broadband access networks, authorization is often handled by a Broadband

Remote Access Server (BRAS). The BRAS is an Edge Node through which all

End-user traffic flows. The BRAS is located at the border of the aggregation

network, interfacing towards application servers, or external networks like the

Internet, see Figure 13 on page 20.

An access network scenario, where a BRAS controls the service access for all

End-users is depicted in Figure 13 on page 20. The aggregation network does

not impose any service access constraints, but merely transports End-user

traffic to and from the BRAS.

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APC IP DSLAM User's Guide Page 23