Sending FH Data by Electronic Remote Fill (ERF) Process

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Although sending an AK OTAR demands several actions on the part of

RECEIVING AK OTAR

the sending NCS, net operators need do nothing except stay off the

PlT to receive the new TEK. Special features of the AK OTAR

procedure are that the TEK in the operational channel of receiving

stations is replaced electronically by the new TEK when the AK OTAR is

sent. Also, the KEK in all receiving stations is automatically updated

(changed) at the time the AK OTAR is sent.

4.8b.

Sending FH Data by Electronic Remote Fill (ERF) Process

Where the Cold Start ERF was sent on the MAN channel, an update

ERF UPDATE

ERF is sent over the operational channel.

To replace the FH data being used in the operational channel, the

FH DATA UPDATE

sending NCS alerts net operations to standby, tells them in which

channel to store the ERF, and sends it. The new FH data can be loaded

in the operational channel only, or through sequential actions, into all

channels.

The procedure for sending an ERF update is as shown in Figure 4-17,

SENDING ERF UPDATE

below (also, see Special NCS Task 1, "Transmit Updated FH Data Via

Net Update ERF"):

Load new FH data into RT.

(1)

Alert net operators for ERF, where to store it, and its

(2)

effective DTG.

Net operators set FCTN to LD and standby for ERF.

(3)

NCS sets FCTN to LD; presses [LOAD] on RT;

(4)

enters channel where new FH data is stored.

NCS presses [ERF] on RT, and returns FCTN

(5)

switch to SQ ON.

Net operators standby, note activation of SIG

(6)

display, press [STO] and channel number for

storage.

NCS confirms net members receipt of the ERF.

(7)

At the time the new FH data is effective, NCS

(8)

makes a communications check using new FH

data.

Figure 4-17. SENDING NET UPDATE ERF

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