Agency: FBI
Originator: FBI
From: DIRECTOR, FBI
To: SAC, TP
Document date: 12/4/61
Document type: PAPER, TEXTUAL DOCUMENT

## Page 1

Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote).

DATE: 11-14-2017

JFK Assassination System

Date:

6/11/201

Identification Form

Agency Information

AGENCY :

RECORD NUMBER :

FBI

124-10213-10064

RECORD SERIES: HQ

AGENCY FILE NUMBER : 92-2781-392

Document Information

ORIGINATOR:

FROM:

TO :

TITLE :

FBI

DIRECTOR, FBI

SAC, TP

DATE: 12/04/1961

' PAGES:

3

SUBJECTS :

[Restricted]

DOCUMENT TYPE: PAPER, TEXTUAL DOCUMENT

CLASSIFICATION: Secret

RESTRICTIONS:

1B

CURRENT STATUS : Redact

DATE OF LAST REVIEW:

- 10/09/1998

OPENING CRITERIA: INDEFINITE

COMMENTS :

v9.1

DocId: 32294288

Page 1

17

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## Page 2

Released under the John F. Kerhedy Assassination Records Collection Act of 1992 (44 USC 2107 Note)?

DATE: 11-17-2017

Tis on

Sible!

12-4-61

ALL IRFORNATIOR CONTANEO

ASSIFIED

INCEPT WASAC SHOWN

OTHERWISE

100

Airtel

13817-95-

Classified

N3p8 mac/Ise

Declassify on

DADR

To:

SAC, Tamp 60-23780 En Votin

JUNE

From:

Director, RBN(82-2781)J SCULL INFORMATON CONTANEO

SANTO TRAFFICANTE,

HEREIN IS UNCLASSIFIED

aka

AR

DATE /0 - 26 94

YSPEMACKSK

DECLASSIFY ON:

Reference is made to previous correspondence in captioned mader ano

your letter dated 10-30-61, furnishing technical data concerning the possible

installations of MISUR surveillances in this case and advising that you would

set up a simulated test circuit to determine what effects a 3000-ohm resistor

across the telephone line will have on telephone service to Joe Diez.

The aboratory has recently developed anfelectronic switch/which

utilizes the same principles as described on Pages 188 and 192 of the Mandodo

of Technical Equigment®

The electronic switch has been substituted for the

COPY FILAT

relay in the subject's premises. It is not, however, necessary to break the

line for the insertion of the special relay as the/electronic switch functions

when bridged across the subscriber's telephone line.

The special/SPMT device using the electronic switching technique (U)

measures 1 1/2' by 7/16" by 1/2". It is complete with a microphone,

preamplifier and the electronic switch/and can be connected directly across the

subscriber's telephone line without atecting his telephone service.

Tests have

indicated that none of the routine tests made by the telephone company test

hidesks nor tests with ohmmeters will reveal the presence of the device.

1X-108 REG-442

1392

EG5 - 196k3om the examinations in the Laboratory,

it was determined that the

cha. device can be concealed in the network of the Automatic flectric

company model 30 telephone, It is not felt at this stage of the development that.

two instruments can be equipped with this device and operated on the same

sunscriber's telephone line.

Cut insi

y1 - Mr. Belmont

1 - Mr. Sullivan (Attn. : Mr. Donohue)

1 = Mr. Evans (Attn,: Mr. Sheridan)

• Bufile 80-760 (RFMT)

1 - Bufile

80-772

Microphone-Telephone, Single Pair

Pry Room

:LETYPE UNIT

CONF

CKC pec (13)

NOTE: Tampa has authority to

-conduct MISUR survey on subjects

in cautioned case.

They proposed

(Cont' d next page)

?

SEBRE!

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## Page 3

\Released under 'the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote).

DATE: 11-14-2017

SLORET

Airtel to SAC, Tampa

Re: SANTO TRAFFICANTI, JR

92-2181

JUNE

It is noted that there is some concern on the part of the telephone company

as to what effect the installation of equipment across the telephone line would have

on the ringing of the subscriber's telephone instrument. While the Laboratory has

no facilities to check the effect on ringing in a system using the frequencies set

forth in your letter of 10-30-61, it is felt that the impedance of the unit is

sufficiently high that ringing will not be affected.

In order that the Laboratory may have a complete diagrammatic layout of

the subjects' services, it is desired that you submit cable prints of the feeder and

distribution cables in the areas in close proximity to the subjects' residences as

well as the area you propose for a monitoring site or sites. You should ascertain

from sources in the General Telephone Company of Florida, the identity of a

normally closed ringing relay that will respond to the ringing frequencies of the

lines involved and advise the Bureau the source of the relays. In addition, you

should ascertain the ringing voltage, talk voltage and operate current for subjects'

telephone service.

You will note that emphasis has been placed on the use of the telephone.

instrument for disguise. You may determine, after a súrvey, that you have a

telephone service outlet which will afford better microphone coverage than the

telephone instrument. If such is the case, the electronic switching device can be

bridged across the line at the outlet or at any place where security and time permit

_concealing the microphone, electronic switch and its associated wires and connect-

ing same to the subject's telephone line.":

In the event you are able, through telephone company cooperation or

otherwise, to/ubstitute a telephone instrument which has been altered to incorporate

the new electronic switching equipment for one now in service/in subjects'

NOTE: the use of/RFMT type of coverage, but Laboratory tests indicate that telephone

sets used for subjects cannot be activated by RFMTunit. Tampa next considered Mu

SPMT typé of installation. Laboratory questioned effect of such a low value of jumper

resistor, required for this type of installation, would have on ringing of telephones in

the area.

The Laboratory has now developed an electronic switch circuit which

should not affect ringing of telephones in the area. For details of electronic switch

circuit see memorandum R. L. Millen to Mr. Conrad/captioned "SPMT - Electronic

Switching Circuit, "' 11-27-614

DocId: 32294288 Page 3

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Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote)?-

DATE: 11-11-2017

SECRET

JUNE

Airtel to SAC, Tampa

Re: SANTO TRAFFICANTE, JR.

92-2781

residences or office, you should advise the Laboratory/which of the instruments

you have previously furnished for experimental purposes should be altered. You

should allow the Laboratory at least 72 hours to alter and test the instrument."

=r.

The telephone instruments previously submitted to the Laboratory will be

retained in the Laboratory pending a decision by you concerning the possibility of

altering the sets for instant operation.

In the event

your survey indicates that a MISUF can be securely installed,

you should submit a request for installation authority.

SECRET

= 3-

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