User manual

Chapter 1. Introduction
1-2 ATLAS Quad USSI Module User Manual 61200261L1-1
Module Specifications
DTE Interface
• EIA-530 Synchronous
• EIA-530A Synchronous
•RS-449
• RS-232 Synchronous
• CCITT X.21 (V.11)
Rate
56 kbps to 2.048 Mbps in 56K or 64K steps
Tests
• Local Loopback (Bilateral)
• Remote Loopback (V.54)
•Self Test
Test Pattern
511 with errored seconds display and error inject capability
Excessive 0s Protection
Excessive zeros alarm indication and configurable excessive zeros protec-
tion
Connector
DB-78 with cables to convert to D sub female connectors
Physical Description
The ATLAS Quad USSI Module can plug into any available option slot in the
ATLAS_800 chassis (see Figure 1-1). The module has an indication under
each D-shell connector referring to the port on the card.
Figure 1-1. ATLAS Quad USSI Module
Adapter Cable
Two ADTRAN-supplied adapter cables convert from the DB-78 connectors
on the rear of the module to Dual D sub connectors. These connectors are
marked as 1/3 and 2/4 to represent the port connected (1 or 3/2 or 4), based
on the cable to which the DB-78 attaches.
USSI
PORT 1&2
PORT 3&4