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Unformatted text preview: CATIONS OPERATION PROCEDURE-1 ‘Terminate AD Service’ Directive will really be effective), or initiated with one of the
‘Initiate AD Service’ Directives performing the ‘Initialize’ action.
2 The FOP-1 Directives include the ‘Set V(S) to V*(S)’ Directive to set the
Transmitter_Frame_Sequence_Number (V(S)). The Directive can be used to set V(S)
in FOP-1 to match the value of the Receiver_Frame_Sequence_Number (V(R)) in
FARM-1. Typically this is necessary when contact is newly established between the
sending end and receiving end following a break. The Directive may be used to set
V(S) in FOP-1 before initiating the AD Service. The correct value must be chosen
for the V*(S) parameter to the Directive. In this case, the correct value is the value
of V(R), as reported by N(R) contained in the CLCWs. 3 The FOP-1 Directives include the ‘Set V(S) to V*(S)’ Directive to set the
Transmitter_Frame_Sequence_Number (V(S)). This Directive is only accepted when
FOP-1 is in the ‘Initial’ State (S6). Use of the Directive should be limited to the case
that the Suspend_State (SS) is equal to zero. When SS is not equal to zero, it means
that the FOP-1 AD Service has been suspended. If the value of V(S) is changed
while FOP-1 is suspended, FOP-1 may be unable to execute the COP-1 procedure
correctly. 4 Some of the FOP-1 Setup Directives are permitted while the FOP-1 AD Service is
active. However, they should be used with caution in these circumstances. Changes
are not limited to subsequent segments, but will affect segments that are currently in
Table 4-1: Directive Types
Directive Type Directive Qualifier Initiate AD Service (without CLCW check) None Initiate AD Service (with CLCW check) None Initiate AD Service (with Unlock) None Initiate AD Service (with Set V(R)) V*(R) (New value for V(R)) Terminate AD Service None Resume AD Service None Set V(S) to V*(S) V*(S) (New value for V(S)) Set FOP_Sliding_Window_Width New value for width of FOP Sliding...
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This document was uploaded on 03/06/2014.
- Spring '14