EXFO IQS-8100 Series Transport Blazer for IQS-600 - Manual (Page 251)

SONET Tabs
SONET/SDH Application 237
APS/Advanced Line OH TX/RX (SONET)
³
K1
³
Request: Bits 1 through 4 of the K1 byte. The default setting is No
Request (0000). Choices are:
Bits 1 to 4 Linear mode Ring mode
0000 No Request No Request
0001 Do Not Revert Reverse Request - Ring
0010 Reverse Request Reverse Request - Span
0011 Not Used Exerciser - Ring
0100 Exerciser Exerciser - Span
0101 Not Used Wait-to-Restore
0110 Wait-to-Restore Manual Switch - Ring
0111 Not Used Manual Switch - Span
1000 Manual Switch Signal Degrade - Ring
1001 Not Used 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
1111 Lockout of Protection Lockout of Protection -
Span/SF - P