ADTRAN TSU 600 - Manual (Page 19)

Chapter 1. Introduction
61200.076L2-1 TSU 600 User Manual 7
TSU INTERFACES
The TSU 600 is equipped with six slots in the rear
panel to house option modules which provide a
variety of additional data ports. See Figure 1-3.
TSU 600
PC or Modem
Network
Up to 6
Control
Input
Chain
Output
NI TSU 600
Chain
Input
Chain
Output
NI
Option Option
Up to 6
Figure 1-3
TSU 600 Interfaces
Network Interface
The Network Interface (NI) port complies with the
applicable ANSI and AT&T standards.
The NI provides the following functions:
• AMI or B8ZS coding
• Automatic or manual line build out
• D4 or ESF framing
• Network performance monitoring and reporting
• Test loopbacks with QRSS generation and checking
• Extensive self test