The ADTRAN TSU LT is a low cost, full-featured
T1/FT1 Data Service/ Channel Service Unit (DSU/CSU). The TSU LT provides an
interface between T1 or Fractional T1 service and the end user's Data Terminal
Equipment (DTE) for applications such as LAN to LAN bridging, Frame Relay circuit
termination and videoconferencing. The TSU LT provides access to traditional
dedicated point-to-point T1 services as well as network termination for Frame
Relay.
Housed in a compact, durable plastic
housing the TSU LT supports synchronous data rates from 56 kbps to 1.536 Mbps
at Nx56 or Nx64 kbps. A single V.35 physical interface provides a connection
to the end user's DTE equipment.
Features:
For configuration and testing, the
TSU LT provides the capability to control a remote TSU LT through the T1 FDL
channel. If the FDL channel is unavailable, the TSU LT can use 8 kbps of the
data traffic to provide configuration and control of the remote unit. The in-band
control channel is used on an as needed basis and is automatically controlled
by the TSU LT.
The TSU LT responds to standard
local and remote loopback commands from the telephone company central office.
In addition, the user has several built-in test capabilities including V.54
remote loopback and 511 BERT test patterns. Complete configuration and performance
data is available from the front panel keypad and two-line by 16 character LCD
display. For additional configuration and monitoring options, the TSU LT supports
a VT100 terminal configuration and control mode which is available through the
control port. For direct serial connections or for remote devices, optional
Windows(R) based PC Management is available through the comprehensive, easy
to use T-Watch PRO(TM) software package.
![](/images/spacer.gif"){kind=spacer}