Specifications

Reference Guide 4-1
CPU Card Introduction
Chapter 4
CPU Card
4.1 Introduction
4.2 CPU-3 XCON (880120 / 880121 / 880022 / 880160)
The CPU-3 XCON card controls the integrated access system. It performs the following
functions:
•
Initializes the system upon power-up, and runs a self-test on all cards plugged into the
chassis at that time.
•
Polls all cards in the system every second to determine their operating status.
•
Processes all incoming operator commands and displays the responses in a series of
operator interface screens for each card in the system. The operator interface system
(local VT-100 terminal, remote computer, or network management system) connects to
the Interface card, which sends these commands to the CPU card for processing. The
Interface card is described in Chapter 5 of this manual.
•
Includes circuitry that allows you to cross-connect DS0 time slots between T1 and E1
lines connected to the system WAN cards. Refer to the DS0 time slot assignment
operations.
•
Includes a test pattern generator for T1 and E1 line test purposes.
•
Performs master-slave CPU arbitration. In a system with redundant CPU cards, the two
CPU cards communicate their status to each other. If the master CPU card fails, the
redundant card takes over and becomes the master.
4.2.1 Card Jumper/Switch Settings
This card does not have any on-board jumpers. The CPU-3 XCON Card has no jumper or
switch settings.
4.2.1.1 Card External Connectors and Pinouts
This card does not have any external connectors.