CAUTION• When the PBX is placed on a desktop, make sure that the PBX is placed as indicated in the diagrambelow. Do not place it on its side or upside down.• Do not block the openings of the PBX. Allow space of at least 20 cm (8 in) above and 10 cm (4 in) atthe sides of the PBX.• When installing the PBX horizontally, do not place it on a tablecloth or carpet. Doing so may causediscoloration due to heat.Desk or Table3.2.8 Wall MountingWhen wall mounting the main unit, use the included screws.WARNING• Make sure that the wall that the unit will be attached to is strong enough to support approximately 5times the weight of the unit. If not, it is necessary for the wall to be reinforced.• Only use the wall-mounting equipment (screws and washers) included with the PBX.• Be careful not to drop any components. Dropping components may damage them or cause an injury.• Proper grounding (connection to ground) is very important to reduce the risk to the user ofelectrocution or to protect the PBX from the bad effects of external noise in the case of a lightningstrike. (See "3.2.4 Frame Ground Connection".)CAUTION• Make sure to install all necessary optional service cards in the PBX before performing the wallmounting procedure. If it is necessary to install or remove a card, make sure to detach the PBX fromthe wall before installing or removing the card.• Do not block the openings of the PBX. Allow space of at least 20 cm (8 in) above, 10 cm (4 in) at thesides, and 10 cm (4 in) below the PBX.• Make sure that the surface behind the PBX is flat and free of obstacles, so that the openings on theback of the PBX will not be blocked.• If the PBX is not installed properly using the securing correct methods, the PBX may fall causingserious damage.• When driving the screws into the wall, be careful to avoid touching any metal laths, wire laths orplates in the wall.• When this product is no longer in use, make sure to detach it from the wall.NoteFor details about dimensions and weight of the PBX, see "2.3.1 General Description".3.2.8 Wall MountingGetting Started 51