Unit installation

FCD-E1 Overview 1-1
Chapter 1
Introduction
1.1 Overview
FCD-E1 is an access unit for E1 (2.048 Mbps) and fractional E1 services that
supports advanced management capabilities, including SNMP.
FCD-E1 is a standalone compact unit, intended for installation on desktops or
shelves. Unit height is 1U (1.75-inch). Optional rack-mount adapter kits enable the
installation of one or two FCD-E1 units in a 19-inch rack.
The wide range of user ports supported by FCD-E1 enables it to serve as an access
unit and integrating multiplexer for E1 and fractional E1 services.
FCD-E1 can also be operated in an unframed mode. In this mode, FCD-E1 accepts
a 2048 kbps data stream through a synchronous data port and converts it to an
ITU-T Rec. G.703 unframed signal for transport over the E1 main link. Thus,
FCD-E1 can also serve as an interface converter and high-speed, short-distance
modem.
Product Options
FCD-E1 is available in several versions that differ in the number and type of user
ports:
• One or two synchronous data channels. The data channels can be ordered
with V.35, V.36/RS-449, or X.21 interfaces.
• One synchronous data channel (with V.35, V.36/RS-449, or X.21 interface)
and one Ethernet 10BaseT interface with internal remote bridge (bridge
function can be enabled or disabled by the user). The bridge can be ordered
with (IR-ETH/Q) or without (IR-ETH) VLAN support. In this version the
Ethernet port is always the upper one (Channel 2), and the synchronous data
channel is the lower one (Channel 1).
• One E1 sublink, which provides a drop-and-insert capability, and enables the
connection of fractional E1 equipment and digital PBXs to the E1 main link.
In this manual, the generic term FCD-E1 is used when the information is applicable
to all FCD-E1 versions. Information applicable to a specific version is explicitly
identified.
Note