Why does the OpenScape Business show "CSTA Overall Status: Partially Disabled" in the diagnosis?

Issue:

The OpenScape Business shows  the alert "CSTA Overall Status: Partially Disabled" in the diagnosis, which causes the PBX node to go offline. 

Solution:

To solve this, the parameter "ACSE_IgnoreStatusPartiallyDisabled" has to be set. Make sure you're using the most recent XPhone UC V4 or XPhone Connect version.

Navigate in the web-based administration overlay of the XPhone Server to CTI > PBX > LANDLINE (V4) or TELEPHONY > GATEWAYS >  LANDLINE (Connect) and edit your PBX node. Under "Advanced settings", add the parameter "ACSE_IgnoreStatusPartiallyDisabled" with the value "True".

After setting this parameter the OpenScape Business will be active again.