Attachment Exhibit A

This document pretains to SES-LIC-20111204-01410 for License on a Satellite Earth Station filing.

IBFS_SESLIC2011120401410_928192

FREQUENCY COORDINATION AND INTERFERENCE ANALYSIS REPORT Prepared for Alaska Telecom, Inc. Sedalia, Colorado Satellite Earth Station Prepared By: COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Virginia 20147 November 30, 2011

TABLE OF CONTENTS 1. CONCLUSIONS.............................................................................................................................................3 2. SUMMARY OF RESULTS.............................................................................................................................4 3. SUPPLEMENTAL SHOWING .......................................................................................................................5 4. EARTH STATION COORDINATION DATA ..................................................................................................6 5. CERTIFICATION .........................................................................................................................................10 Frequency Coordination and Interference Analysis Report 11/30/2011 Page 2 of 10

1. CONCLUSIONS An interference study considering all existing, proposed and prior coordinated microwave facilities within the coordination contours of the proposed earth station demonstrates that this site will operate satisfactorily with the common carrier microwave environment, based upon the restrictions noted in the Summary of Results (Section 2). Frequency Coordination and Interference Analysis Report 11/30/2011 Page 3 of 10

2. SUMMARY OF RESULTS A number of great circle interference cases were identified during the interference study of the proposed earth station. Each of the cases, which exceeded the interference objective on a line-of-sight basis, was profiled and the propagation losses estimated using NBS TN101 (Revised) techniques. The losses were found to be sufficient to reduce the signal levels to acceptable magnitudes in most cases. The following companies reported potential great circle interference conflicts that did not meet the objectives on a line-of-sight basis. When over-the-horizon losses and frequency separation are considered on the interfering paths, sufficient losses exist to negate harmful interference from occurring with the proposed transmit-receive earth station. Further, the transmit spectrum will be limited to frequencies 5925.0 to 5958.7 MHz, and 5991.0 to 6425.0 MHz. Company Colorado Springs Utilities Qwest Corporation Sangre de Christo Communications, Inc. State of Colorado Verizon Wireless – Mountain Region No other carriers reported potential interference cases. Frequency Coordination and Interference Analysis Report 11/30/2011 Page 4 of 10

3. SUPPLEMENTAL SHOWING Pursuant to Part 25.203(c) of the FCC Rules and Regulations, the satellite earth station proposed in this application was coordinated by Comsearch using computer techniques and in accordance with Part 25 of the FCC Rules and Regulations. Coordination data for this earth station was sent to the below listed carriers with a letter dated October 29, 2011. Company AT&T COMMUNICATIONS OF MOUNTAIN STATES Adcom 911 AirLife Denver BNSF Railway Company Black Hills Corporation Boulder, County of CBS Communications Services CBS Television Stations Cellular Inc. Network Corporation City of Colorado Springs Colorado Interstate Gas Company Colorado Springs Utilities ENTRAVISION HOLDINGS, LLC FONES WEST DIGITAL SYSTEMS INC. Gray Television Licensee, Inc. (KKTV) Great Western Communications, LLC Intermountain Rural Electric Association International Communications Group, Inc. METROPOLITAN AREA NETWORKS, INC. MHO Networks Multimedia Holdings Corporation NE Colorado Cellular, Inc. New Cingular Wireless PCS LLC -Colorado Nex-Tech Wireless, LLC Open Range Communications Inc., D-I-P QWEST CORPORATION SANGRE DE CRISTO COMMUNICATIONS, INC. Smoky Hill Cellular of Colorado LP Sprint Communications Company, LP State of Colorado Tri State Generation & Transmission Verizon Wireless - Mountain Region Frequency Coordination and Interference Analysis Report 11/30/2011 Page 5 of 10

4. EARTH STATION COORDINATION DATA This section presents the data pertinent to frequency coordination of the proposed earth station that was circulated to all carriers within its coordination contours. Frequency Coordination and Interference Analysis Report 11/30/2011 Page 6 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Date: 11/30/2011 Job Number: 111029COMSJC01 Administrative Information Status ENGINEER PROPOSAL Call Sign Licensee Code S30800 Licensee Name ALASKA TELECOM, INC. Site Information SEDALIA, COLORADO Venue Name Latitude (NAD 83) 39° 22' 53.9" N Longitude (NAD 83) 105° 2' 54.1" W Climate Zone A Rain Zone 2 Ground Elevation (AMSL) 2159.51 m / 7085.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Digital Satellite Arc 60° W to 143° West Longitude Azimuth Range 122.4° to 230.9° Corresponding Elevation Angles 25.2° / 30.0° Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Information Receive Transmit Manufacturer Vertex/RSI Vertex/RSI Model 9.2 Meter 9.2 Meter Gain / Diameter 50.1 dBi / 9.2 m 53.6 dBi / 9.2 m 3-dB / 15-dB Beamwidth 0.52° / 1.07° 0.37° / 0.77° 21K9G7W to 43M2G7W Max Available RF Power (dBW/4 kHz) -2.7 -11.9 (dBW/MHz) 4.7 12.1 Maximum EIRP (dBW/4 kHz) 50.9 41.7 (dBW/MHz) 58.3 65.7 Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Frequency Information Receive 4.0 GHz Transmit 6.1 GHz Emission / Frequency Range (MHz) 21K9G7W - 43M2G7W / 3700.0 - 4200.0 21K9G7W - 33M0G7W / 5925.0 - 5958.7 21K9G7W - 43M2G7W / 5991.0 - 6425.0 Max Great Circle Coordination Distance 325.8 km / 202.4 mi 193.3 km / 120.1 mi Precipitation Scatter Contour Radius 495.1 km / 307.6 mi 100.0 km / 62.1 mi Frequency Coordination and Interference Analysis Report 11/30/2011 Page 7 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values SEDALIA, CO Licensee Name ALASKA TELECOM, INC. Latitude (NAD 83) 39° 22' 53.9" N Longitude (NAD 83) 105° 2' 54.1" W Ground Elevation (AMSL) 2159.51 m / 7085.0 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Model Vertex/RSI 9.2 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -2.7 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 5.91 120.33 -10.00 126.07 -10.00 100.00 5 6.45 115.79 -10.00 120.25 -10.00 100.00 10 5.65 111.00 -10.00 128.57 -10.00 100.00 15 6.05 106.36 -10.00 124.65 -10.00 100.00 20 6.43 101.68 -10.00 120.48 -10.00 100.00 25 6.35 96.96 -10.00 121.34 -10.00 100.00 30 5.27 92.21 -10.00 132.24 -10.00 100.00 35 3.92 87.53 -10.00 149.57 -10.00 100.00 40 2.97 82.93 -10.00 172.24 -10.00 100.00 45 2.53 78.35 -10.00 182.43 -10.00 100.00 50 2.05 73.82 -10.00 193.40 -10.00 100.00 55 1.50 69.36 -10.00 205.60 -10.00 104.70 60 0.41 65.09 -10.00 259.61 -10.00 147.13 65 0.00 60.79 -10.00 285.28 -10.00 170.66 70 0.00 56.46 -10.00 285.28 -10.00 170.66 75 0.00 52.21 -10.00 285.28 -10.00 170.66 80 0.00 48.05 -10.00 285.28 -10.00 170.66 85 0.00 44.02 -9.09 291.12 -9.09 174.19 90 0.00 40.17 -8.10 297.67 -8.10 178.04 95 0.00 36.54 -7.07 304.60 -7.07 182.02 100 0.00 33.22 -6.03 311.76 -6.03 186.01 105 0.00 30.30 -5.04 319.42 -5.04 189.85 110 0.00 27.92 -4.15 325.78 -4.15 193.27 115 0.92 25.34 -3.09 265.46 -3.09 142.12 120 1.12 24.22 -2.61 259.16 -2.61 136.88 125 1.36 24.01 -2.51 251.04 -2.51 132.27 130 1.94 24.46 -2.71 230.49 -2.71 117.40 135 2.48 25.87 -3.32 213.45 -3.32 104.12 140 3.31 27.87 -4.13 194.31 -4.13 100.00 145 4.01 30.15 -4.98 174.90 -4.98 100.00 150 4.37 32.41 -5.77 162.66 -5.77 100.00 155 5.20 33.93 -6.26 147.66 -6.26 100.00 160 5.61 35.42 -6.73 141.05 -6.73 100.00 165 6.52 36.02 -6.91 131.83 -6.91 100.00 170 6.74 36.84 -7.16 128.44 -7.16 100.00 175 6.87 37.35 -7.31 126.51 -7.31 100.00 180 6.25 38.17 -7.54 132.26 -7.54 100.00 185 5.16 39.05 -7.79 141.15 -7.79 100.00 Frequency Coordination and Interference Analysis Report 11/30/2011 Page 8 of 10

COMSEARCH Earth Station Data Sheet 19700 Janelia Farm Boulevard, Ashburn, VA 20147 (703)726-5500 http://www.comsearch.com Coordination Values SEDALIA, CO Licensee Name ALASKA TELECOM, INC. Latitude (NAD 83) 39° 22' 53.9" N Longitude (NAD 83) 105° 2' 54.1" W Ground Elevation (AMSL) 2159.51 m / 7085.0 ft Antenna Centerline (AGL) 9.75 m / 32.0 ft Antenna Model Vertex/RSI 9.2 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power -2.7 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 4.34 39.19 -7.83 152.64 -7.83 100.00 195 4.65 37.80 -7.44 149.64 -7.44 100.00 200 5.95 35.10 -6.63 137.97 -6.63 100.00 205 6.59 32.70 -5.86 134.13 -5.86 100.00 210 6.25 30.82 -5.22 140.83 -5.22 100.00 215 6.00 28.53 -4.38 147.79 -4.38 100.00 220 5.62 26.58 -3.61 155.96 -3.61 100.00 225 5.12 25.55 -3.19 164.48 -3.19 100.00 230 4.75 25.29 -3.08 172.62 -3.08 100.00 235 4.50 25.84 -3.31 175.59 -3.31 100.00 240 4.25 27.24 -3.88 176.76 -3.88 100.00 245 3.90 29.47 -4.73 178.64 -4.73 100.00 250 4.21 31.74 -5.54 166.62 -5.54 100.00 255 4.70 34.42 -6.42 153.79 -6.42 100.00 260 4.93 37.72 -7.41 145.59 -7.41 100.00 265 4.91 41.45 -8.44 141.22 -8.44 100.00 270 4.20 45.72 -9.50 147.08 -9.50 100.00 275 4.18 49.76 -10.00 145.15 -10.00 100.00 280 4.37 53.86 -10.00 142.35 -10.00 100.00 285 4.11 58.20 -10.00 146.23 -10.00 100.00 290 3.97 62.55 -10.00 148.56 -10.00 100.00 295 4.04 66.91 -10.00 147.28 -10.00 100.00 300 3.87 71.35 -10.00 150.46 -10.00 100.00 305 5.46 75.60 -10.00 130.40 -10.00 100.00 310 4.75 80.18 -10.00 136.90 -10.00 100.00 315 4.02 84.73 -10.00 147.54 -10.00 100.00 320 4.15 89.22 -10.00 145.59 -10.00 100.00 325 3.85 93.71 -10.00 150.93 -10.00 100.00 330 2.62 98.10 -10.00 180.27 -10.00 100.00 335 2.61 102.52 -10.00 180.56 -10.00 100.00 340 2.77 106.94 -10.00 176.87 -10.00 100.00 345 3.22 111.40 -10.00 164.60 -10.00 100.00 350 3.22 115.75 -10.00 164.62 -10.00 100.00 355 4.91 120.53 -10.00 134.83 -10.00 100.00 Frequency Coordination and Interference Analysis Report 11/30/2011 Page 9 of 10

5. CERTIFICATION I HEREBY CERTIFY THAT I AM THE TECHNICALLY QUALIFIED PERSON RESPONSIBLE FOR THE PREPARATION OF THE FREQUENCY COORDINATION DATA CONTAINED IN THIS APPLICATION, THAT I AM FAMILIAR WITH PARTS 101 AND 25 OF THE FCC RULES AND REGULATIONS, THAT I HAVE EITHER PREPARED OR REVIEWED THE FREQUENCY COORDINATION DATA SUBMITTED WITH THIS APPLICATION, AND THAT IT IS COMPLETE AND CORRECT TO THE BEST OF MY KNOWLEDGE AND BELIEF. Jeffrey E. Cowles Engineer III, Telecommunications COMSEARCH 19700 Janelia Farm Boulevard Ashburn, Va. 20147 DATED: November 30, 2011 Frequency Coordination and Interference Analysis Report 11/30/2011 Page 10 of 10


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