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Chapter 2 – Installation
The MultiAccess model MA220 is designed to install either on a desktop or a flat surface. The mounting
of the MA220 is defined in the MA220 Mechanical Mounting (Optional) section in this chapter.
The MultiAccess models MA420 and MA820 are designed to install either on a desktop or in a standard
EIA 19" rack, and is shipped with the mounting hardware to install the MultiAccess in the rack. If installing
in a rack, use the provided mounting hardware and follow the rack enclosure manufacturer's instructions
to safely and securely mount the MultiAccess in the rack enclosure. Proceed to the cabling procedure.
Safety Warnings
• Use this product only with UL- and CUL-listed computers.
• Never install phone wiring during a lightning storm.
• Never install a phone jack in a wet location unless the jack is specifically designed for wet locations.
• Never touch uninsulated phone wires or terminals unless the phone line has been disconnected at the
network interface.
• Use caution when installing or modifying phone lines.
• Avoid using a phone during an electrical storm; there is a risk of electrical shock from lightning.
• Do not use a phone in the vicinity of a gas leak.
• To reduce the risk of fire, use only 26 AWG or larger telephone line cord.
• Disconnect this product from its power supply and telephone network interface when servicing.
Caution:
Danger of explosion if battery is incorrectly replaced. A lithium battery on the MultiAccess PC
board provides backup power for the time-keeping capability. The battery has an estimated life
expectancy of ten years. Contact Multi-Tech if you suspect a failed battery. If data and time are incorrect
after having the unit powered off, it may be due to a weak battery or incorrect setup.
Caution:
The Ethernet ports are not designed to be connected to a Public Telecommunication Network.
Safety Recommendations for Rack Instructions
• Ensure proper installation of the MultiAccess in a closed or multi-unit enclosure by following the
recommended installation as defined by the enclosure manufacturer. Do not place the MultiAccess
directly on top of other equipment or place other equipment directly on top of the MultiAccess.
• When mounting the euipment in a rack, make sure mechanical loading is even to avoid a hazardous
condition, such as loading heavy equipment in the rack unevenly. The rack should safely support the
combined weight of all equipment it supports.
• If installing the MultiAccess in a closed or multi-unit enclosure, ensure adequate airflow within the rack
so that the maximum recommended ambient temperature is not exceeded.
• Ensure that the MultiAccess is properly connected to earth ground via a grounded power cord. If a
power strip is used, ensure that the power strip provides adequate grounding of the attached
apparatus.
• Ensure that the mains supply circuit is capable of handling the load of the MultiAccess. Refer to the
power label on the equipment for load requirements.
• Maximum ambient temperature for the MultiAccess is 60 degrees Celsius (140° F).
• This equipment should only be installed by properly qualified service personnel.
• Only connect like circuits. In other words, connect SELV (Secondary Extra Low Voltage) circuits to
SELV circuits and TN (Telecommunications Network) circuits to TN circuits.
Multi-Tech Systems, Inc. MultiAccess User Guide
Chapter 2 – Installation
9
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