Field strength measurements

Mr Andrey Didenko General Radio Frequency Centre Building 15, 7 Derbenevskaya Embankment 117997 Moscow Russia Your 05.06.2015 nr MC-1281 26.06.2015 nr MC-1437 Our 14.07.15 nr 22-1/ 15-0511-013 GSM frequency coordination situation at Russian -Estonian border areas Dear Mr Didenko Thank you for informing us about the violations regarding GSM channels usage at the border areas. With reference to the General Radio Frequency Centre letters MC-1281 and MC-1437 the Estonian Technical Surveillance Authority (hereinafter ETSA) performed GSM measurements at 01 st and 02 nd July 2015 near the Estonian – Russian border. As a result of the measurements ETSA detected that Estonian GSM operators were exceeding the field strength on some Russian preferential frequency channels and informed Estonian operators to solve the issue. During the measurements we also detected that the Russian mobile telephone service providers with mobile network codes 01, 02 and 99 do not follow the requirements prescribed in the item 2.3 of the „Agreement between the Telecommunications Administrations of Estonia and Russia concerning the use of the frequency bands 890-915/935-960 MHz for Land Mobile Service of Estonia and Russia and the Aeronautical Radionavigation Service of Russia in the border areas“ (Tallinn, 05.04.2002) by exceeding the maximum allowed field strength level (19 dB µV /m) at the border line . Please find the summary of violations in the following table: Date of measurement Channel number MCC MNC LAC CID Field strength ( dBμV /m) Measurement point 01.07.2015 62 250 1 280 7371 75 59N0008 27E4418 01.07.2015 1018 250 1 324 17632 41 59N2239 28E1208 01.07.2015 25 250 1 324 18233 46 59N2239 28E1208 01.07.2015 26 250 1 324 17353 45 59N2239 28E1208 01.07.2015 31 250 1 324 6422 48 59N2239 28E1208 01.07.2015 35 250 1 324 18112 48 59N2239 28E1208 01.07.2015 71 250 99 14761 63795 56 59N2239 28E1208 01.07.2015 124 250 2 4702 197 40 59N2753 28E0238 01.07.2015 27 250 1 324 18113 41 59N2753 28E0238 01.07.2015 31 250 1 324 6422 55 59N2753 28E0238 01.07.2015 34 250 1 324 6423 43 59N2753 28E0238 01.07.2015 52 250 1 324 8952 48 59N2753 28E0238 01.07.2015 71 250 99 14761 63795 47 59N2753 28E0238 02.07.2015 53 250 2 6002 21434 44 57N3826 27E2158 Please take appropriate measures in order to fulfill the requirement of before mentioned agreement. Yours sincerely , Raigo Uukkivi Director General Composed by Henry Sarapuu 667 2081 [email protected]