User manual

61200261L1-1 ATLAS Quad USSI Module User Manual 1-1
Chapter 1 Introduction
ATLAS QUAD USSI MODULE OVERVIEW
The ATLAS Quad USSI Module provides four synchronous DTE ports, each
of which can operate at any rate that is a multiple of 56 or 64 kbps, up to
2.048 Mbps. You can install the ATLAS Quad USSI Module into any avail-
able option slot of the ATLAS_800 chassis.
Features
• Each port operates using 1 to 32 time slots, each time slot being 56 or 64
kbps
• 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)
Interfaces
• EIA-530
• EIA-530A
•RS-449
•RS-232
• CCITT X.21 (V.11)
• Connector: DB-78
(DB-78 to Dual D sub connector adapter cables ship with this module.)
You can invoke loopbacks locally or remotely (V.54).