SECURE TELEPHONE UNIT (STU) TASKS

TM 11-5820-890-10-8

7.3.

SECURE TELEPHONE UNIT (STU) TASKS

7.3a.

Definition of STU Tasks

There are four STU tasks which enable an NCS or communications

WHAT ARE THEY?

specialist to transfer classified data over unlimited distances via

commercial or military telephone circuits.

COMSEC keys, FH data (hopsets, TSK, and net IDS), and SOI

WHAT'S INVOLVED?

information can be sent from ANCD to ANCD via a STU transfer.

It is assumed that the NCS or communications specialist performing

WHAT'S REQUIRED?

these tasks is fully qualified in the employment of the STU for sending

and receiving classified information. Only the four tasks shown below,

involving use of the ANCD with the STU, represent required training.

7.3b.

Summary of STU Tasks

Send COMSEC Keys/FH Data From ANCD to ANCD Via STU

STU TASK 1:

This task allows an NCS or communications specialist to send

classified COMSEC keys and FH data from an ANCD at one location to

an ANCD at another location, regardless of distance, by commercial or

military telephone.

Receive COMSEC Keys/FH Data Into An ANCD Via STU

STU TASK 2:

This task enables an NCS or communications specialist to receive and

store in an ANCD the COMSEC keys and FH data sent from another

ANCD by telephone.

Send SOI Information From ANCD to ANCD Via STU

STU TASK 3:

This task permits an NCS or communications specialist to transmit

classified SOI information from an ANCD at one location to an ANCD at

another location by telephone.

Receive SOI Information Into An ANCD Via STU

STU TASK 4:

This task allows an NCS or communications specialist to receive and

store in an ANCD that classified SOI information sent from one location

to another by telephone.

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