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Chapter 1
ESU 120E OVERVIEW
The ESU 120e is an E1/FE1 multiplexer with an Nx56/64 data port,
a drop (PBX) interface, one option slot, and embedded SNMP man-
agement. The ESU 120e's option slot accepts one of many available
option modules for voice and data applications.
The ESU 120e serves as the link between user data sources such as
local area network (LAN) bridges and routers, computers, CAD
systems, teleconferencing equipment, and PBXs. Through the use
of multiple data ports, the ESU 120e can simultaneously connect
one or more of these devices to a E1 circuit. The amount of band-
width allocated to each port is custom-programmable. You can
manually allocate bandwidth or set the bandwidth to automatically
change at predetermined times to use the available bandwidth
most advantageously. Changes in the configuration do not disrupt
data flow in channels that are not being reconfigured. The unique
architecture and the availability of option modules provides a path
for growth to accommodate future requirements.
The ESU 120e offers a wide variety of network management
options. You can manage via SNMP through the 10BaseT or chain-
in ports. If you are using T-Watch Pro, a Microsoft Windows® pro-
gram, you can manage the ESU 120e via the same 10BaseT or chain-
in ports. An enhanced VT-100 terminal interface is also provided.
61200420L1-1
ESU 120e User Manual
Introduction
1-1
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