Chapter 1. Introduction

TDU 120e OPTION MODULES

Some of the option modules available for the TDU 120e are:

DSX-1

Provides a short haul T1 interface for operation with a

PBX (Terminal Interface).

Full Drop and Insert

Permits the dropping of data and insertion of new data into the same DS0 time slot.

This module includes a long haul DS-1 interface. It can also be used as a second DS-1 interface to provide an up to 3 MB aggregate throughput.

Nx56/64 serial interface

Provides a V.35 serial interface in either single or dual versions.

Voice interface

Provides 2 or 4 channels FXS/FX0/E&M.

OCU DP

Interfaces to DDS or 4-wire Switched 56, dual or single versions.

DSU DP

Provides two sync or async ports (EIA-232 or V.35).

Dial backup

Allows for backup of data upon network T1 failure.

U-BR1TE

Allows ISDN lines to be extended over a T1 line.

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TDU 120e User Manual

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ADTRAN user manual TDU 120e Option Modules, DSX-1, Ocu Dp, Dsu Dp, BR1TE