3Com VCX V7111 Fast Track Installation Guide 7 SELV — Safety extra low voltage circuit. TNV-3 — Circuit whose normal operating voltages exceeds the limits for an SELV circuitunder normal operating conditions and on which over voltages from TelecommunicationNetworks are possible TNV-2 — Circuit whose normal operating voltages exceeds the limits for an SELV circuitunder normal operating conditions and is not subjected to over voltages fromTelecommunication NetworksFCC Notice to UsersThis equipment has been tested and found to comply with the limits for a Class B digitaldevice, pursuant to part 15 of the FCC Rules. These limits are designed to providereasonable protection against harmful interference in a residential installation. Thisequipment generates, uses, and can radiate radio frequency energy and, if not installed andused in accordance with the instructions, may cause harmful interference to radiocommunications. However, there is no guarantee that interference will not occur in aparticular installation. If this equipment does cause harmful interference to radio or televisionreception, which can be determined by turning the equipment off and on, the user isencouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiveris connected. Consult the dealer or an experienced radio/TV technician for help.This equipment complies with Part 68 of the FCC rules and the requirements adopted byACTA. On the bottom of this equipment is a label containing a product identifier in the formatUS:3CMIS02BMP10XFXO. If requested, this number must be provided to the telephonecompany.The telephone company may make changes in the facilities, equipment, operations, orprocedures that could affect the operation of the equipment. If this happens, the telephonecompany will provide advance notice for you to make necessary modifications to maintainuninterrupted service.