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61200771L1-1 NxT1 HSSI/V.35 Module User Manual 19
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 800
PLUS
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