Installation Requirements 53InstallationRequirementsVerify that you meet the prerequisites that are detailed in the followingsections before you install the NBX system.ElectricalRequirementsVerify that the site meets the following electrical requirements.■ Each NBX chassis requires an electrical connection.■ The NBX system should have its own breaker-protected circuit thatuses the standard, three-wire, grounded configuration.■ Verify that there are enough outlets and circuit capacity in the chosenlocation to supply power to the NBX chassis and any auxiliaryequipment that you install, such as a paging amplifier and an MOHdevice. The label on each chassis lists the electrical requirements of thesystem.■ You can eliminate the power adapter for the telephone by using apowered Ethernet cable. See “Using a Powered Ethernet Cable toPower the Telephone” in Chapter 3 for more information.CAUTION: 3Com strongly recommends that you use UL listed surgesuppression devices for the telephones and the local telephone lines andan uninterruptible power supply for each NBX chassis.EnvironmentalRequirementsYou can install the NBX system in any clean, dry, well-ventilated location.Take these environmental guidelines into consideration:■ The area must be safe from water damage. A wet basement, a utilitycloset, or an area near a window are not proper locations.CAUTION: Do not use the NBX system outdoors.■ The area must be safe from physical interference. For example, do notput the chassis where it might be struck by a swinging door or wherecables might be disturbed by a door or by people passing by.■ Do not install the NBX system in an area that is exposed to strongelectromagnetic fields, dust, smoke, or airborne debris.■ Verify that the installation site has sufficient cooling and air circulationto maintain ambient temperatures from 0 °C through 40 °C (32 °Fthrough 104 °F) and a humidity range of 5% to 85%, noncondensing.
