ERF relay operation. An ERF signal will not automatically pass through a retransmit
RT to another outstation. lf possible, RT C and D should have all required FH data
before being taken to their site. RT A and C must have the same FH data. RT B and
D will have the same FH data. In the following example, RT A is the NCS, and RT
D has the MODE switch set to
Before starting this procedure, make sure communication is possible
between links. RT A (NCS) MUST set COMSEC switch to
RT A tells RT C to break the retransmit link (set FCTN to LD) and to stand
by for ERF.
RT C sets FCTN to LD.
RT A sends ERF to RT C; then RT C stores ERF, and changes MODE to
d. RT C has RT D stand by for FH update.
RT D sets FCTN to LD and MODE to FH.
RT C sends FH update data to RT D; then RT D stores data (RT D must have
same FH data as RT C to receive update data).
RT C sets MODE to FH and FCTN to RXMT.
RT D sets MODE to
and has RT B stand by for FH update.
RT B sets FCTN to LD and MODE to FH.
RT D sends FH update data to RT B; then RT B stores data.
RT D sets MODE to FH, and FCTN to RXMT.
Retransmit operation is now possible.
m. If required, RT A communicates with RT B on new hopset.