Spectrum Efficiency Attestation Letter

FCC ID: 2AARFBFTM82501

Attestation Statements

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FCCID_3860557

Fujian BelFone Communications Technology Co., Ltd. A15, Huaqiao Economic Development Zone, Shuangyang, Luojiang, Quanzhou, Fujian, China Tel: 0595-28396717 Fax: 0595-22771635 Email: overseas@bfdx.com Justification Letter Date: 2018-2-10 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AARFBFTM82501 Model number: BF-TM8250 UHF Dear Sir/Madam, We, Fujian BelFone Communications Technology Co., Ltd., acknowledge that this device will not be marketed to USA users with the frequency band which is not allowed by rule part 90.and it is a violation of FCC rules if this device is operated on unauthorized frequencies inside the U.S.A. This equipment meets the requirements of the FCC Rules, Parts 90.203(e) and (g), as applicable. Programming of this products transmit frequencies can be performed ONLY by the manufacturer or by service or by maintenance personal. The operator can’t program transmit frequencies using the equipment’s external operation controls. This is to certify that the requirements of 47 CFR Part 90.203(j)(4) and (5) spectrum efficiency are met by the Fujian BelFone Communications Technology Co., Ltd. as demonstrated by the tests conducted on the sample radio provided. The tests show that the 4FSK data rate is in accordance with ETSI TS 102 361-1, that is 9600 bits per second in a 12.5 kHz bandwidth to satisfy the data rate requirement of 4800 bits per second per 6.25 kHz of channel bandwidth (7K60F1D emissions). Additionally the Digital Portable Radio uses the AMBE+2 half-rate vocoder to compress 60 ms of normal bursts are sent in alternate 30 ms TDMA slots and so comply with the equivalence of one voice channel per 6.25 kHz bandwidth (7K60F1E emission). Additionally the radio also meets the requirement of one voice channel per 12.5kHz of channel bandwidth for analogue speech (7K60F1D emission). Sincerely Yours, Signature: Edward Wang Manager


Document Created: 2018-05-22 17:57:06
Document Modified: 2018-05-22 17:57:06
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