78– M-Ratings: Phones rated M3 or M4 meet FCC requirements and arelikely to generate less interference to hearing devices than phones thatare not labeled. M4 is the better/higher of the two ratings.– T-Ratings: Phones rated T3 or T4 meet FCC requirements and arelikely to generate less interference to hearing devices than phones thatare not labeled. T4 is the better/higher of the two ratings.Hearing devices may also be rated. Your hearing device manufactureror hearing health professional may help you find this rating. Higherratings mean that the hearing device is relatively immune to interferencenoise. The hearing aid and wireless phone rating values are then addedtogether. A sum of 5 is considered acceptable for normal use. A sum of6 is considered for best use.In the above example, if a hearing aid meets the M2 level rating andthe wireless phone meets the M3 level rating, the sum of the two valuesequal M5. This is synonymous for T ratings. This should provide thehearing aid user with “normal usage” while using their hearing aid withthe particular wireless phone. “Normal usage” in this context is definedas a signal quality that is acceptable for normal operation.The M mark is intended to be synonymous with the U mark. The T markis intended to be synonymous with the UT mark. The M and T marksare recommended by the Alliance for Telecommunications IndustriesSolutions (ATIS). The U and UT marks are referenced in Section 20.19of the FCC Rules. The HAC rating and measurement procedure aredescribed in the American National Standards Institute (ANSI) C63.19standard.To ensure that the Hearing Aid Compatibility rating for your phoneis maintained, secondary transmitters such as Bluetooth and WLANcomponents must be disabled during a call. See Page XX for instructionsto disable these components.FCC Regulatory ComplianceFCC Regulatory ComplianceThis device complies with Part 15 of the FCC Rules. Operation is subjectto the following two conditions: (1) this device may not cause harmfulinterference, and (2) this device must accept any interference received,including interference that may cause undesired operation.Your mobile device is a low power radio transmitter and receiver. Whenit is ON, it receives and also sends out radio frequency (RF) signals.In August 1996, the Federal Communications Commission (FCC)adopted RF exposure guidelines with safety levels for mobile devices.Those guidelines are consistent with safety standards previously setby both U.S. and international standards bodies: American NationalStandard Institute (ANSI), National Council of Radiation Protectionand Measurements(NCRP), and International Commission on Non-Ionizing Radiation Protection (ICNRP). Those standards were basedon comprehensive and periodic evaluations of the relevant scientificliterature. The design of your phone complies with the FCC guidelinesand applicable.