AASTRA SIP-DECT (Release 1.8)-Installation- and Administration Guide EN - Manual (Page 72)

Installation, Administration and Maintenance
Aastra depl-0900/0.4 Page: 72 (104)
Fall over occurs in the following instances:
-
An OMM error occurs on the active OMM
-
The RFP acting as the active OMM is shut down or rebooted at the
ssh console
-
The OMM is rebooted in the web browser menu.
-
The active OMM is unreachable
The resilient or standby OMM becomes the active OMM in the following
instances:
-
The configured SIP Proxy/Registrar is reachable
-
The other OMM has a larger IP Address while no OMM is active and
both OMMs’ are in contact with each other (normally at system start-
up).
When the OMMs’ get in contact again:
-
Both OMMs check which one ran for a longer period. That one will
become the active OMM. The other one falls back to the standby one.
5.5 Fall Over Failure Situations
Fall over failure occurs in the following instance:
-
The IP connection between OMMs’ fails and the configured SIP
Proxy/Registrar is unreachable.
In this case the active OMM shall wait until the SIP Proxy/Registrar is
reachable.
The following state diagram shows the OMM–Resiliency states: