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oxivei@yrares DEPARTMENT OF sesyye FEDERAL BUREAT oF INVESTIGATION WasGiXGTOxX 25.BR.6, - 4 - August 17, 1961 In connection with the use of microphone survelllances it is frequently hecessary <o lease a special telephone -ine in order to monitor such 2 Surveilence. These situations occur when it is impossible to locate 2 secure monitoring point ih tne immecizie viccnity of the premises covered by the microphone. =ven though a special telephone line is utilized, this activity in | mo Way involves any interception of telessonic communications and 23 20% a telephone tap. - ° tn the New York City cres the teleshone company has over the years insisted the: 2 letter be furnished to the telephone a cvapany On each occasion when 2 Sp3cicl telephone line is lezsed by wee FBIL it is recived thar Suc. 2 logse arrangement be with the esproval of the Ancorney Generzi, In the past we have restricta¢g wé Utilization of leased lines én New York City to sitzations inveiving telephone tans, all of wich have been assroved by the Attorne General, = ‘o ¥ “ a } Ve have not Previcusly used leased Unes in cormmection Win microphone surveillences because of certain <echnice] Ciificulties welch exisied in New York City. These technical citticulties have, * =~oWever, =ow been overcome. if we are permitted to use lezcsed telerhone iines 2s an adjunct to our microphone Survelllences, this tyse of coveraze an be sncterially extended both in SeCuriy anc major criminal cases. Accordingly, your aonroval of cus utilizing this leased line arrangement is requested. A sample of the letter which it is proposed will be sent +h the telenhone company if a lessed line is secured in connection with microphone surveillances is aviached, 27- Lt 7— | 043 EL CLGaunb ot ear ~ 4 7 4lyy a ot PNanb RIPE Se 8 Seem et ener tes mat & ‘