• The plug of power supply cordset is used as the main disconnect device. Ensure that the AC outlet is
located near the equipment and is easily accessible.
• Slots and openings in the front, back and bottom of the cabinet are provided for ventilation; to protect it
from overheating,
these openings must not be blocked or covered. The openings should never be blocked
by placing the product on a bed, sofa, rug, or other similar surface while in use. The product should never
be placed near or over a radiator or other heat source. This product should not be placed in a sealed
environment unless proper ventilation is provided.
• Make sure that the surface behind the PBX is flat and free of obstacles, so that the openings on the back
of the PBX will not be blocked.
• When this product is no longer in use, make sure to detach it from the rack or wall.
• Use only the AC power cord included with the PBX. A certified power supply cord has to be used with this
equipment. The relevant national installation and/or equipment regulations shall be considered. A certified
power supply cord not lighter than ordinary polyvinyl chloride flexible cord according to IEC 60227
(designation H05VV-F 3G 0.75 mm²) shall be used.
• When the PBX is mounted on a 19-inch rack, make sure that the installation of the unit does not cause the
temperature of the rack to exceed its limit.
• Make sure to install all necessary optional service cards in the PBX before performing the wall mounting
procedure. If it is necessary to install or remove a card, make sure to detach the PBX from the wall before
installing or removing the card.
• When driving the screws into the wall, be careful to avoid touching any metal laths, wire laths or plates in
the wall.
• Before opening the top cover, the AC power cord must be removed from the AC inlet.
• Disconnect the AC power source before servicing the equipment.
• For safety reasons, close the top cover and tighten the screws before operating the PBX.
• If the PBX is not installed properly using the securing correct methods, the PBX may fall causing serious
damage.
• Performing surge protection is essential. Make sure to follow the instructions in "4.2.11 Surge Protector
Installation".
• It is strongly recommended to use TLS encrypted communication when the PC is accessing the PBX via
the Internet. To use TLS encryption, routers must have a port set up for https communication.
• Avoid using the same AC outlet for computers and other office equipment, as noise generated by such
equipment may hamper system performance or interrupt the system.
• Unplug the system from its power source when wiring, and plug the system back in only after all wiring is
completed.
• Trunks should be installed with surge protectors. For details, refer to "4.2.11 Surge Protector
Installation".
• When installing or removing the optional service cards, the power switch must be turned off, and the AC
power cord must be removed from the AC inlet.
• For earthing wire, green-and-yellow insulation is required, and the cross-sectional area of the conductor
must be more than 0.75 mm
2
or 18 AWG.
• When connecting a PRI30/E1, PRI23, BRI2 or BRI4 card to the trunk, connect through an NT1; do not
connect to the U interface of the trunk directly.
• PRI ports of PRI30/E1 and PRI23 cards are SELV ports and should only be connected to SELV services.
• The MOH port and Pager port are SELV ports and should only be connected to approved SELV devices,
or via a Line Isolation Unit with a Telecommunications Compliance Label.
WARNING
This is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
22 Installation Manual
1.1 For Your Safety
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