‘Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hotey. DATE: 11-14-2017 JFK Assassination System Date: 5/12/201 Identification Form : “Agency Information AGENCY: FBI _ RECORD NUMBER: = 124-90103-10067 RECORD SERIES: HQ AGENCY FILENUMBER: 92-2940-441 Document Information ORIGINATOR: FBI FROM: HQ TO: PG TITLE: DATE: 02/26/1965 “PAGES : 2 SUBJECTS : SEBASTIAN JOHN LAROCCA DOCUMENT TYPE: PAPER; TEXTUAL DOCUMENT CLASSIFICATION: — Unclassified RESTRICTIONS : 1B CURRENT STATUS: — Redact DATE OF LASTREVIEW: = 07/31/1998 OPENING CRITERIA: INDEFINITE COMMENTS : MEMO rr v9.1 Docld: 323327666 Page 1
Pooate: under the John F. ec Aeosetnatten Records Collect ier Act or 1992 (44 USC 2107 HoTery. y Ne ; : ‘ : ‘ MATE: 11-14-2017 | ULE ; 5 7 : Le . th : - ory ava JUNE 2/26/65 Mr. McAndrews (Rm. 1529) Mr. Millen fl Mr. Baker Mr. Corbett The following is technical information for review by |. the sound trained agents assigned your Division. SAC, Pittsburgh (92-226 Sub 2) + WBA pirectat™ Bex (e2-2940)—- A// SERASTYA JOHN LA ROCCA, aka (00: PITTSBURGH) be _ En a letter dated 2/10/65 in captioned matter, you furnished line information of the telephone service for captioned individual's home, and inquired whether or not the (Radio-Frequency Microphone-Telephone (RFHT) or the Zener Activated Microphone (ZAM) } techniques could be used to effect MISUR coverage. a It. is necessary to alter a Western Electric 500 type telephone instrument to make it respond to the RFMT unit. It follows, therefore, that entry must be made into the target area to complete installation. If entry is necessary, there are other techniques such as the SPMT and 4-wire devices which should be. - considered before resorting to the use of a classified technique requiring extremely tight protective custody. In general, the ZAM unit follows the same installation procedures and uses the same line switching principles as the SPMT device set forth in Chapter 26, Part I, Page 181 of the o Handbook of Technical Equipment. A special microphone unit, known aS a ZAM, must be installed at a point in the target area where it can be connected directly across the telephone line. The ZAM may ee, VG disguised in a number of different configurations, for example, jin a 42A connecting block, in an auxiliary ringer, in the network } a fof a telephone instrument, in a block measuring 1 9/16 inches long,. -§| “2 g/9/16 inch wide and 2/8 inch thick, etc. The target. telephone g “2 Ziline must be looped through a local plant between the telephone , ™ gi central office and the target area. While it is desirable to 3 co Slloop the target line through a plant by adding a minimum length lof wire, there are installations of record where spare pairs of wires are used to develop the loop circuit. a Tolson Belmont The Bureau has a limited number of especially designed otter : ble. Room » & MAR 5 Page i {V1 rhLeryee unit Docld: 323327666 Page 2? [I] vols —_____wemote control SPMT switching units for special applications. A dcocr Secure place with 110 volt AC must be provided for looping the ie aes , [ses CKC :eVv ’ C.. oy \ i te
éased under the John F. Kennedy Assassination Records Collection ‘Act of 19927 (44 sc 23707 Hovey” DATE: 11-14- “2017 As ; #7‘) better to Pittsburgh {- Re: SEBASTIAN JOHN LA ROCCA, ak AR Bufile 92-2940 target telephone. line through the remote control switching equipment . The remote control switching Gquipment is housed in three cases, two measuring 7 1/4 inches wide, 7.3/4 inches long and 41/4 inches | high, and one measuring 11 1/2 inches wide, 15 inches: long and 5 3/4 i inches high. The space should be as dust free as possible and accessible for periodic maintenance ¢chécks, —T = if, after receiving authorization to make a “survey of the target area, you desire specific details concerning the possible use of the ZAM or other. techniques in, this case, submit \ cable prints,: cable records Showing multiple appearances, block \ diagrams showing drop Wire. and cable distribution points for the ' target. area. and all aultiple appearancés: of the target line as well as multiple appearances of spare pairs at target. working appearance, to the Electronics Section of the ‘Laboratery. Too, 4t will be helpful.to know those points where apspare. pair is ( avedlabie for a Aéased line to the central moni toring ‘plant. : This dnformation is for technical assistance of the ound trained Agents in ‘your: Division and does. not constitute authority. to make a MISUR, wurvey. an captioned case. . Q a Docld: 323327666 Page 3