Multitech MultiDSU MTT1DSU User Manual page 8

Introduction
The Multi-Tech Systems MultiDSU (Model number MTT1DSU) is a low
cost, full-featured T1-FT1 Data Service Unit (DSU). The MultiDSU
provides an interface between point-to-point T1 or Fractional T1 service
and the end user's Data Terminal Equipment (DTE). This unit also
provides Facility Data Link (FDL) support.
Housed in a compact, durable housing, the MultiDSU supports D4 or
ESF framing and AMI or B8ZS line coding on the T1 Line and supports
synchronous data rates from 56 kbps to 1.536 Mbps to the DTE. A
single V.35 (Winchester 34-pin) physical interface is the Data port to the
DTE device.
This unit enables you to run complete diagnostics (loopback tests on
your T1 line or your local or remote DSU) from your PC or terminal.
Figure 1-1. MultiDSU
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