EXFO FTB-800 Series for FTB-1 - Manual (Page 398)

Test Functions
388 FTB-700G/800 Series
APS
APS
From the Test menu, tap Functions, and the APS tab.
TX/RX

Switching Mode, available for both TX and RX, selects the switching
mode: Linear (default) or Ring.

K1
Request: Bits 1 through 4 of the K1 byte.
Bits
1 to 4
Request
Linear mode Ring mode
0000 No Request
a
No Request (default)
a
0001 Do Not Revert Reverse Request - Ring
0010 Reverse Request Reverse Request - Span
0011 Unused Exerciser - Ring
0100 Exerciser Exerciser - Span
0101 Unused Wait-to-Restore
0110 Wait-to-Restore Manual Switch - Ring
0111 Unused Manual Switch - Span
1000 Manual Switch Signal Degrade - Ring
1001 Unused Signal Degrade - Span
1010 Signal Degrade - Low Priority Signal Degrade (Protection)
1011 Signal Degrade - High Priority Signal Fail - Ring
1100 Signal Fail - Low Priority Signal Fail - Span
1101 Signal Fail - High Priority Force Switch - Ring
1110 Force Switch Force Switch -Span