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Chapter 1. Introduction
20 NxT1 HSSI/V.35 Module User Manual 61200771L1-1
When combined with the supported ATLAS 800 Series base units and,
optionally, one or more Quad T1/PRI or T3 Modules, the NxT1 HSSI/V.35
Module can implement high-speed point-to-point connectivity), combining
multiple T1 circuits into one logical channel on the HSSI/V.35 interface.
FUNCTIONAL DESCRIPTION
The NxT1 HSSI/V.35 Module installs in any available option slot in the
supported ATLAS 800 Series units. You can view the status of the module
itself, as well as the circuits to which it interfaces, from the front panel
(ATLAS 800
PLUS
only). Additional status information is available via the
terminal menus, accessible through either a VT-100 terminal connected to
the ATLAS 800 Series control port, or via a Telnet session established
through the unit’s Ethernet port. Use the terminal menu to configure the
NxT1 HSSI/V.35 Module and to download application software.
FEATURES
Features of the NxT1 HSSI/V.35 Module are listed here:
• Standard SCSI-II 50-pin connector for HSSI interface
• Optional V.35 interface using adapter cable (ADTRAN P/N 3125I081)
• Hot swappable
• Maximum distance 6,000 feet (DS-1), 655 feet (DSX-1) when using 24
gauge conductor
NXT1 HSSI/V.35 MODULE SPECIFICATIONS
Each T1 port of the NxT1 HSSI/V.35 Module conforms to the following
specifications:
Line Rate
1.544 Mbps ± 75 bps
Framing
D4, SF or ESF per ANSI t1.403 and AT& T TR 54016
Line Coding
• B8ZS (Bipolar Eight Zero Substitution)
• AMI (Alternate Mark Inversion)
Alarms
Loss of Signal (LOS), Red, Yellow, Blue