ABB FOX61 Series, Руководство пользователя

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I N T R O D U C T I O N
FOX61x

LEDE1 11
2 Introduction
This section presents a general introduction to the LEDE1 unit.
The section is closed with a unit view in section "Installation" (page 15) .
2.1 General
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.
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.
data TDM
Network
data
E1
TDM
Network
E1
DTE DTE
STM-1 STM-1
E1 E1
DTE DTE
FOX61x
FOX61x
LEDE1 SAMO2
FOX61x
FOX61x
LEDE1 LEDE1
LEDE1 SAMO2
LEDS1
LEDS1