ADTRAN TSU 120 Bedienungsanleitung Seite 27

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61202129L1-1 TSU 120 User Manual 1-1
Chapter 1
Introduction
TSU 120 OVERVIEW
This manual covers the use of the following products:
•TSU 120
TSU 120e
Unless otherwise stated, the TSU 120 refers to both products.
The TSU 120 is a T1/FT1 multiplexer with an Nx56/64 V.35
data port, a DSX-1 (PBX) interface, a 10BaseT port, one option
slot, and embedded SNMP management. The TSU 120e offers a
built-in dial back up feature for the Nx port. The TSU 120’s
option slot accepts one of many available option modules for
voice and data applications.
The TSU 120 links user data sources such as local area network
(LAN) bridges and routers, computers, CAD systems, telecon-
ferencing equipment, and PBXs. Through the use of multiple
data ports, the TSU 120 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 manu-
ally 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 dis-
rupt data flow in channels that are not being reconfigured. The
unique architecture and the availability of option modules pro-
vides a path for growth to accommodate future requirements.
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