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61202156L2-1A TDU 120e User Manual 1-1
Chapter 1
Introduction
TDU 120e OVERVIEW
The TDU 120e is a T1/FT1 multiplexer with the following
features:
• Nx56/64 V.35 data port
• DS-1 (PBX) interface
•option slot
• embedded SNMP management
The TDU 120e’s option slot accepts one of many available
option modules for voice and data applications.
The TDU 120e serves as the link between user data sourc-
es such as:
• local area network (LAN) bridges and routers
•computers
•CAD systems
• teleconferencing equipment
•PBXs
Through the use of multiple data ports, the TDU 120e can
simultaneously connect one or more of these devices to a
T1 circuit. The amount of bandwidth allocated to each
port is custom-programmable. You can manually allocate
bandwidth or set the bandwidth to change automatically
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 recon-
figured. The unique architecture and the availability of