Chapter 2. Installation

TDU 120e Interfaces

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

 

 

 

PC or Modem

 

 

 

 

 

 

Control

Chain

 

Chain

Chain

 

Input

Output

 

Input

Output

 

NI TDU 120e

 

NI TDU 120e

Network

DS-1

 

 

DS-1

 

 

Nx56/64 Option

 

Nx56/64 Option

PBX

V.35

 

DS-1

V.35

 

 

 

 

Figure 2-2. TDU 120e Interfaces

Network Interface

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.

Nx56/64 Serial Interface

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.

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TDU 120e User Manual

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ADTRAN user manual TDU 120e Interfaces, Network Interface