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Attachment A - Joint Agreement for 800 MHz CCCS Page 50 of 83 Establishes policy on usage of Bi-Directional Amplifiers (BDA) and awareness of all locations utilizing BDAs for the purpose of mitigating interference issues. Technical Background The System is designed for mobile and portable radio coverage but cannot provide 100% coverage in all places. BDAs are a device that aims to improve radio access within a confined space such as high -density buildings. Although the use of a BDA may improve in -building coverage, it may also create interference Issues with the overall System. Tracking the locations of all BDAs will aid in quickly locating offending BDA equipment. Protocol/Standard It is not the intent for the Lead Agency or Governance Committee to approve or regulate BDAs. It is important for the Lead Agency to maintain a list of facilities that do have BDAs used with the System. Any agency or department installing a BDA will provide the Lead Agency with the location of the device prior to installation if possible. This will include the physical address, emergency contact information, building name, location within the building, manufacturer and model number. It is the responsibility of the equipment/facility owner to comply with all requirements of the FCC, including licensing, location reporting, and interference mitigation. Recommended Procedure Agencies installing BDAs will submit to the Lead Agency a list of locations where BDAs are installed that are supplementing the System. BDAs not supplementing the System do not need to be reported. This list will be updated periodically. Management The Lead Agency will maintain the list of BDAs supplementing the System. Each agency will maintain a list of BDAs within their jurisdiction along with contact information for the equipment/facility owner to allow access should the BDA interfere with the System. 4.21 Aircraft Radio Installations and Operation Purpose or Objective Sets the policy regarding aircraft subscriber radio installation, programming, and operation on the System. Technical Background Due to the elevated altitude of operation, aircraft radios have a greater coverage footprint. This allows a radio operated in the air to access sites as far away as 150 to 200 miles, while mobile radios operated in vehicles on the ground typically have ranges limited to 30 to 40 miles. Radios In aircraft operating with the System function slightly different than radios on the ground.