3Com 3C10200 NBX Installation Guide - Page 81

Installation Requirements 81 Installation Requirements Verify that you meet the prerequisites that are detailed in the following sections before you install the NBX system. 3Com does not support more than one NBX system on a local area network. You can connect NBX systems over a WAN (using VTLs or SIP trusted endpoints), however, installing more than one NCP on a LAN can cause unpredictable results. Electrical Requirements Verify 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 that uses the standard, three-wire, grounded configuration. ■ Verify that there are enough outlets and circuit capacity in the chosen location to supply power to the NBX chassis and any auxiliary equipment that you install, such as a paging amplifier and an MOH device. The label on each chassis lists the electrical requirements of the system. ■ You can eliminate the power adapter for a telephone by using a powered Ethernet cable. See "Connecting Power to a 3Com Telephone" in Chapter 3 for more information. CAUTION: 3Com strongly recommends that you use UL listed surge suppression devices for the telephones and the local telephone lines and an uninterruptible power supply for each NBX chassis. Environmental Requirements You 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 utility closet, 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 not put the chassis where it might be struck by a swinging door or where cables might be disturbed by a door or by people passing by. ■ Do not install the NBX system in an area that is exposed to strong electromagnetic fields, dust, smoke, or airborne debris.