User guide

The EDA Components
1/1551-HSC 901 35/3 Uen C 2005-12-02
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4.5 The EDA Converters
For small site solutions the EDA system offers two types of converters, the
FE to E1 converter (EXN104) and the Ethernet gateway (EXN401/410) for
bridging the Ethernet and the ATM network.
4.5.1 The FE to E1 and T1 Converter
The Fast Ethernet to E1 converter (EXN104) is a small-managed converter
developed for EDA rollout where no Ethernet uplink is available, see Figure
23 on page 33. The FE-E1 converter is intended for installation of the EDA
solution at small sites with a few IP DSLAMs, see Figure 24 on page 34.
Figure 23 Fast Ethernet to E1 and T1 Converter - EXN104
A cost-effective solution to this problem is to transport the Ethernet traffic
through vacant E1 lines using the FE-E1 converter. For a small site either
remote or at the CO the typical PoE box is an EPN102.
Furthermore the converter can be setup to transport the Ethernet traffic
through T1 lines. The converter is default setup to run in E1 mode, but can
be configured to run in T1 mode as well. One important difference between
running E1 and T1 is the data transfer speed, which for an E1 line is 2.048
Mbps and for a T1 line is 1.544 Mbps.