NVRCSI610-03Bidirectional Amplifier

September 24, 2002 Federal Communications Commission Office of Engineering and Technology 7435 Oakland Mills Rd. Columbia, MD 21046 Subject: Request for Confidentiality Dear Sir or Madam: Cellular Specialties, Inc. respectfully requests that the schematic diagrams, block diagram, and circuit descriptions submitted with the application for certification under FCC ID NVRCSI610-03 be withheld from public disclosure. This request is made under the provisions of Section 0.457 (d) of the Commission’s rules and Section 0.552 (b) (4) of the Freedom of Information Act. This product has been developed at considerable expense, and disclosure of this information would place Cellular Specialties, Inc. at a competitive disadvantage. Thank you for your attention to this matter. Sincerely yours, Donald C. Mills Vice President, System Products

MODEL 610 PCS Bi-DIRECTIONAL AMPLIFIER FCC ID LABEL FCC ID NVRCSI610-03 IC: 4307A-610BDA This device complies with parts 24 and 2 of the FCC rules and with Industry Canada specification RSS-131

Evaluation of the CSI Model 610 pcs BDA For Compliance with FCC Guidelines For Human Exposure to Radio Frequency Electromagnetic Fields 7 October 2002 General The CSI Model 610pcs Bi-directional amplifier is considered to be a “mobile” device operating in the Personal Communications Service authorized under part 24. As such, the equipment is required to be evaluated for RF exposure if operated above 1.5 GHz with an effective radiated power (ERP) of 3.0 watts or more, as defined in 2.1091 of FCC rules. Downlink For the downlink portion of the Model 610pcs BDA, the maximum rated output power is +26dBm (400 mW). As stated in the Model 610pcs Manual, the maximum authorized antenna gain is 8 dBi, corresponding to a Co-Linear Omni-Directional antenna. Neglecting cable losses, the worst-case EIRP will be 2.51 watts or an ERP of 1.53 watts, (ERP=EIRP/1.64). This is well below the 3.0 watts ERP limit and therefore excludes the downlink from routine evaluation. The Cautions in the Model 610pcs manual clearly define the antenna selection and installation criteria in order to maintain a minimum 20- centimeter separation. Uplink For the downlink portion of the Model 610pcs BDA, the maximum rated output power is +24.7dBm (300 mW). As stated in the Model 610pcs Manual, the maximum authorized antenna gain is 8 dBi, corresponding to a Co-Linear Omni-Directional antenna. Neglecting cable losses, the worst-case EIRP will be 1.86 watts or an ERP of 1.14 watts, (ERP=EIRP/1.64). This is well below the 3.0 watts ERP limit and therefore excludes the downlink from routine evaluation. The Cautions in the Model 610pcs manual clearly define the antenna selection and installation criteria in order to maintain a minimum 20- centimeter separation. Conclusion Because of the low output power and antenna gains, both the uplink and downlink will satisfy the requirements for RF Exposure per FCC rules 1.1311.