Chapter 1. Introduction
61200060L1-1 TSU User Manual 1-5
Features
• A DS1 interface and an Nx56/64 DTE serial interface
port.
• Easy configuration capabilities using simplistic menus
displayed in a Liquid Crystal Display (LCD) window
operated by a front panel keypad.
• Timing is selectable from the network, from the Nx56/64
DTE port, or internally.
• All ones, 3:24, 511 and 1:8 Test Patterns.
• Extensive self test and monitoring provides assurance of
proper operation.
• Flexible channel allocation (any starting channel and
alternate or contiguous).
Interfaces
The TSU is equipped with four interfaces. See Figure 1-3.
• Network DSI interface per AT&T 621411
• Nx56/64 serial V.35 high speed interface
• Control input (RS232) / Chain port input
•Chainportoutput
Figure 1-3. TSU Interfaces
TSU
PC or Modem
Network
Nx56/64
Control
Input
Chain
Output
NI
TSU
Nx56/64
Chain
Input
Chain
Output
NI
