Environmental Requirements - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Environmental Requirements

The memory cards are color-coded and have different titles to indicate their
contents and function:
Feature Upgrade Memory Card. Orange label with black bars; entitled
Forced Installation . To upgrade your system to the latest release.
Maintenance Upgrade Memory Card. Orange label; entitled Upgrade
Card . To fix problems in the system.
NOTE:
A third type of memory card has a white label and is entitled Translation Card .
This memory card is used to back up and restore your system programming as
described in "Backing Up the System" in Chapter 6, "Managing the System."
For more information about upgrading your system, contact your AT&T
representative.
Environmental Requirements
The control unit requires a regulated environment that is temperature-controlled,
clean, and not exposed to direct sunlight. In addition, proper power and
grounding are essential for correct and safe system operation, and to protect
the system against lightning, power surges, and other problems.
If the control unit and other system components were installed by qualified
AT&T technicians, these requirements were met during installation.
After installation, you can help with the correct operation of the system by
making sure the following rules are observed:
The electrical outlet for the control unit must not be controlled by a
switch. Plugging the control unit into an outlet that can be turned on and
off by a switch invites accidental disconnection of the system.
The AC outlet must be properly grounded by using an AC receptacle for
a 3-prong plug.
Do not install the control unit outdoors.
Do not place the control unit near extreme heat (furnaces, heaters, attics,
or direct sunlight).
Do not expose the control unit to devices that generate electrical
interference (such as arc welders, or the motors of air conditioners and
ventilators, compressors, and so on).
Each auxiliary power unit requires one outlet.
Do not expose the control unit to moisture, corrosive gases, dust,
chemicals, spray paint, or similar material.
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