ADTRAN NxT1 HSSI/V.35 user manual Introduction, NXT1 HSSI/V.35 Module Overview

Chapter 1 Introduction

NXT1 HSSI/V.35 MODULE OVERVIEW

The NxT1 HSSI/V.35 Module is a member of the ATLAS 800 family of integrated access products that supports aggregating point-to-point T1 bandwidth (from 2 to 8 T1s) to a single logical datastream available on the high speed serial interface (HSSI) of the module. The HSSI interface is delivered using a standard 50-pin SCSI-II connector. Alternately, an optional adapter cable may be purchased (ADTRAN P/N 3125I081) to convert the HSSI interface to a single V.35 interface when needed. When using the NxT1 HSSI/V.35 Module in a V.35 configuration, up to 4 T1s of aggregated bandwidth is supported.

The inverse multiplexing capacity of the module accommodates eight T1s, and the module automatically adjusts the data rate to the HSSI/V.35 port upon loss of one or more T1 circuits. In addition to the HSSI port, four T1 ports are included on the module itself, while alternate T1 ports can be provided using other ATLAS 800 T1 or T3 modules. The NxT1 HSSI/V.35 Module combines with the ATLAS 800 Series base units (ATLAS 800PLUS and ATLAS 890 only) and other ATLAS modules to support applications calling for increased point-to-point T1 bandwidth. Figure 1-1 shows a sample application of the NxT1 HSSI/V.35 Module.

Figure 1-1. NxT1 HSSI/V.35 System

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