On an Active NOAM, the Policy and Charging > Configuration > Online Charging DRA > OCS Session State page lists the network-wide list of Online Charging Servers (OCSs), listed by their Realm and FQDN. It is used to configure the Session State setting for OCSs.
The list of OCSs is updated by inserting or deleting an OCS from the Policy and Charging > Configuration > Online Charging DRA > OCSs page at each site's SOAM. Additionally, the Realm and FQDN are configured from each site's Diameter > Configuration > Peer Nodes page on the SOAM.