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Chapter 2. Installation
TDU 120e Interfaces
PC or Modem
Network
Network Interface
Nx56/64 Serial Interface
2-6
The TDU 120e rear panel is equipped with an Nx/DBU
data port, a DS-1 interface, an option slot, management
interfaces, an external alarm connector, and a T1 interface.
See Figure 2-2.
10BaseT
Chain
Control
Input
Output
NI TDU 120e
DS-1
Nx56/64 Option
PBX
V.35
The Network Interface (NI) port provides the connection
to the T1. This port complies with the applicable ANSI
and AT&T standards. For more information see
Appendix B.
The Nx56/64 provides a serial V.35 port that operates
from 56 kbps to 1.536 Mbps. This port provides 511 pat-
tern generation and detection and remote loopback capa-
bility.
TDU 120e User Manual
Chain
Chain
Input
Output
NI TDU 120e
DS-1
Nx56/64
Option
DS-1
V.35
Figure 2-2. TDU 120e Interfaces
61202156L2-1
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