User guide

The EDA Components

1/1551-HSC 901 35/3 Uen C 2005-12-02

4.1.3 The EDN312 and EDN312x IP DSLAM

The 12-line IP DSLAM comes in two version, the EDN312 and the

EDN312x both and available in different variants

• EDN312p – 12 lines with built-in POTS filter

• EDN312i – 12 lines with built-in ISDN filter

• EDN312e – 12 lines with built-in POTS filter and complies to ETSI

standard.

• EDN312xp – 12 lines with built-in POTS filter, ADSL2+ facilities and

two 100 Mbps Ethernet uplink ports, making it possible to use them in a

link aggregation scenario.

• EDN312xi - 12 lines with built-in ISDN filter, ADSL2+ facilities and two

100 Mbps Ethernet uplink ports, making it possible to use them in a link

aggregation scenario.

• EDN312xe – 12 lines with built-in POTS filter, ADSL2+ facilities and

two 100 Mbps Ethernet uplink ports, making it possible to use them in a

link aggregation scenario. Complies to the ETSI standard.

Redundancy and Aggregation Options (EDN312x only)

The EDN312x versions (EDN312xp, EDN312xi and EDN312xe) have two

uplink ports, which EAN redundancy, and EDN312x link aggregation. EAN

redundancy utilizes Rapid Spanning Tree, which can be setup in the

ECN320. The two scenarios are described in further detail below in section

4.1.4 on page 19, but for a full understanding the reader is referred to the

EDN288 User Guide.

There is no difference between the two uplink ports of the EDN312x. It

does not matter which port is connected to which aggregation switch. The

EDN312x draws power from one of the links. There is no indication and it is

not possible to know which link supplies the power (applies also to the

redundancy scenario).

Note: If the link that currently supplies the EDN312x is disconnected, or

the power fails, the EDN312x will restart and draw power from the