Table 19: Revertive, Non-Revertive Timing Reference Switching Operation - Alcatel-Lucent 7210 SAS M Configuration Manual

System Basics Introduction
The Table 19
modes:

Table 19: Revertive, non-Revertive Timing Reference Switching Operation

Reference A
Page 220
shows the selection followed for two references in both revertive and non-revertive
Status of
Reference B
OK
Failed
OK
OK
OK
Failed
OK
Failed
Failed
Failed
OK
7210 SAS M, T, X, R6 Basic System Configuration Guide
Status of Active Reference
Non-revertive Case
OK
OK
OK
Failed
OK
Failed
Failed
Failed
OK
Failed
OK
Active Reference
Revertive Case
A
B
B
A
A
holdover
A
holdover
B
holdover
A or B
A
B
A
A
A
holdover
A
holdover
B
holdover
A