About O3b Link
Overview of system Monitor (overview)
OceanTRx™4-500 O3b System Installation Guide
5-7
1.
Practical Examples
Roles set in O3bLink: ACU1-Secondary, ACU2-Primary, ACU3-Backup:
If on handover start all 3 antennas are Ready, their roles will be the same as set in
O3bLink: ACU1-Secondary, ACU2-Primary, ACU3-Backup
However if for example ACU2 is Not Ready during 20 sec after start the assigned roles
will be: ACU1-Primary, ACU2-Backup, ACU3-Secondary
Another case: ACU1 is Not Ready. The roles will be: ACU1-Backup, ACU2-Primary,
ACU3-Secondary
Roles set in O3bLink: All roles in O3bLink are Auto
If all 3 antennas are Ready on start, their roles will be: ACU1-Primary, ACU2-
Secondary, ACU3-Backup
If for example ACU1 is Not Ready, the roles will be: ACU1-Backup, ACU2-Primary,
ACU3-Secondary
2.
“Impractical” Examples
Since the software does not prevent senseless settings such as defining all three
Antennas roles as “Primary” or setting two of the Antennas (1 and 2) to “Back-up” and
the third to “Auto”, the following response logic is implemented:
Antenna with higher role in O3bLink gets higher initial role on start.
Primary role is higher than Secondary, Secondary is higher than Auto, Auto is higher than
Backup.
If roles of 2 antennas in O3bLink are equal, antenna with smaller ID gets higher role.
So, if all antennas are in normal state, in case of Antennas (1 and 2) are set to “Back-up”
while Antenna 3 set to “Auto”, the actual role assignment will be: Ant1-Secondary, Ant2-
Backup, Ant3-Primary;
In case of all three Antennas set to “Primary”, the actual role assignment will be: Ant1-
Primary, Ant2-Secondary, and Ant3-Backup
