Release 4.0 Processor Module - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Control Unit
Figure 3–1. Release 4.0 Processor Module
The processor module has a single-character display for numbers and symbols
that help AT&T technicians to understand any problems with the system
software and to maintain the system. The module also has a red light that
indicates hardware failures.
A super capacitor in the processor module provides backup power for the
system's clock and its memory in case of power failure or system shutdown. The
super capacitor retains data for 4 to 5 days.
PCMCIA Memory Card
The processor includes 4 MB of on-board memory that can be erased and
written over multiple times. A PCMCIA memory card can be used to install or
upgrade the system software into this memory. A memory card can also be
used to back up and restore system programming.
There are different types of memory cards, each about the size of a credit card.
Their labels indicate contents and function. Described below are three types of
PCMCIA memory cards that you may come in contact with. For more
information, see System Programming or contact your AT&T representative.
Module Label
Error/Status Code Display
PCMCIA
Interface Slot
Debugging Port (plugged to prevent access)
Alarm Status Light
SMDR Port
ADMIN Port
System Components
3–3