Table of Contents
Advertisement
Chapter 2 Inspection and Installation
PC or Modem
Network
Network Interface (NI)
The Network Interface (NI) port provides the connection to the T1/FT1. It complies with the applicable
ANSI and AT&T standards.
Control Port Input (Chain In)
The control port input provides an EIA-232 input from a PC or a modem for control of the TSU LT. You
can also use it as a Chain input from any ADTRAN unit with a Chain port or as input for PC proxy agent
control.
Chain Port Output (Chain Out)
The chain port output include provides an EIA-232 output to chain control to other TSU LTs.
V.35 Nx56/64 Serial Interface
The Nx56/64 serial interface operates at the following data rates: N*56K or N*64K, where N=1 to 24
(DS0s).
POWER UP TESTING & INITIALIZATION
Self-Test
When shipped from the factory, the TSU LT is set to factory default conditions. When you first power-up,
the unit automatically executes self-tests followed by an initialization sequence which sets up the unit. The
self-test checks the integrity of the internal operation of the electronic components by performing memory
tests and by sending and verifying data test patterns through all internal interfaces. Although actual user
data cannot be passed during these tests, the self-test can run with the network and DTE interfaces in place,
without disturbing any external interface.
The self-test automatically executes upon power-up. It can also be commanded from a front panel menu or
from the control port.
24
Control
Chain
Input
Output
TSU
NI
Nx56/64
Figure 2-2. TSU LT Interfaces
© 2003 ADTRAN, Inc.
TSU LT User Manual
Chain
Chain
Input
Output
TSU
NI
Nx56/64
61203060L1-1A
Advertisement
Table of Contents
