Introduction; General; Figure 1: Lede1 Used As An Access Unit (Top) And As A Transport Unit (Bottom) - ABB FOX61 Series User Manual

2

Introduction

2.1

General

DTE
DTE

FOX61x LEDE1
This section presents a general introduction to the LEDE1 unit.
The section is closed with a unit view in section
This document describes the architecture and functions of the LEDE1 unit
and shows how this unit is commissioned and operated as part of the
FOX61x.
The LEDE1 unit is a 1-slot wide service unit of FOX61x and provides 8 E1
(2 Mbit/s) interfaces according to ITU-T G.703. Traffic signals can be
unstructured or structured according to ITU-T G.704.
The E1 interface of the LEDE1 unit can be used as access interface to a
high speed TDM network, e.g. the P12 signals from the E1 interfaces are
transported over SDH.
Another application is in a TDM network where the LEDE1 unit is used as a
transport unit, e.g. the low bit rate data signals from a DTE are transported
via structured P12 signals over the E1 interface.
FOX61x
E1 STM-1
LEDE1 SAMO2
FOX61x
data E1
LEDS1 LEDE1
Figure 1: LEDE1 used as an access unit (top) and as a transport unit (bot-
tom)
The LEDE1 unit accesses the PBUS (FOX61x internal TDM bus) with P0-nc
(n x 64 kbit/s) and P12 (2048 kbit/s) signals.
"Installation" (page
FOX61x
TDM
STM-1
SAMO2
Network
FOX61x
TDM
E1
LEDE1
Network
I N T R O D U C T I O N
15).
E1
DTE
LEDE1
data
DTE
LEDS1
11