Specifications

Reference Guide
1-1
System Overview Introduction
Chapter 1
System Overview
1.1 Introduction
This chapter describes the various chassis models used by the integrated access system. It also
shows each chassis and the associated card slot locations.
Three series of chassis models are available. These include the front-loading chassis with
power supplies on the side (891630); the front- and rear-loading chassis with power supplies
on the side, also called the
two-sided
chassis (891830) and the front-loading chassis with
enhanced power supply (891930).
The integrated access system uses four basic types of plug-in cards: common (CPU and
Interface); user (Voice, Data and Alarm); server (ADPCM, FRS, MCC, ATM, ISDN-PRI,
PRI-BRI, IMUX and IPR cards); and WAN (for T1 or E1 networks). All cards slide into slots
in front of a front-loading chassis, or into both sides of a two-sided chassis. Card guides on the
top and bottom of the chassis slots align the cards with the connectors for easy insertion.