61200.184L1-1
Quad Nx56/64 Module User Manual
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Chapter 1
Introduction
QUAD Nx 56/64 MODULE OVERVIEW
The Quad Nx (pronounced “N-by”) 56/64 Module provides four syn-
chronous V.35 DTE ports, each of which can operate at any rate that is a
multiple of 56 or 64 kbps, up to 1.536 Mbps. The Quad Nx 56/64 Module
can be installed in any option slot of the ATLAS chassis.
Features
• Each port operates using 1 to 24 DS0s
• Includes an elastic store for absorption of rate variations
• Any port can be used as a timing source for the entire system
• Outputs a 50 percent duty-cycle output clock at all rates
• Generates and responds to V.54 looping codes
• Generates and checks 511 test patterns
• Bidirectional loopbacks:
- Port (toward the network)
- DTE (toward the DTE)
Loopbacks can be invoked locally or remotely (V.54).
Interfaces
• CCITT V.35 electrical (differential)
• Connector: DB-37 (DB-37 to Dual Winchester V.35 connector adapter
cables are shipped with this module)
