User guide

EDA System Design
1/1551-HSC 901 35/3 Uen C 2005-12-02
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10.4 Dimensioning the Network
An EDA access network is build around generic system elements that to a
great extent adapt automatically to architectural changes in the network. It
can therefore easily be extended to support increasing traffic and/or
changed performance requirements.
10.4.1 Capacity of System Elements
All elements included with the EDA system are optimized to meet the
capacity requirements of any ADSL access network.
The EDA IP DSLAM is capable of handling up to 8 Mbps downstream traffic
and 1 Mbps upstream traffic on all lines simultaneously.
The EDA switches are capable of switching traffic between all ports at full
wire speed.
10.4.2 Dimensioning an EDA Access Network
The capacity requirements of an EDA network depends on the following
issues:
• The number of subscribers connected.
• The bandwidth provisioned per subscriber.
• The nature and combination of applications that must be supported.
• Service Level Agreements, that is, the service guaranties purchased by
the subscribers.
• The subscriber’s traffic patterns.
A substantial concentration of traffic onto oversubscribed links is normally
acceptable in an access network. However, a generally applicable ratio of
over subscription cannot be given.