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- O1 interface - SMO-RIC connectivity over O1 Netconf and O1 VES is described in O1 RIC Health-Check (Flow #2)
- A1 interface - SMO-RIC connectivity over A1 is not defined at this time as connectivity checks are done by NB clients (OTF or Test Driver) when making policy queries and policy creation/deletion. See A1 RIC Health-Check (Flow #3).
- E2 interface - RIC-RAN Managed Functions (O-CU, O-DU) over E2 is depicted in the diagram above. For the initial implementation, the RIC's E2 Termination module checks keep-alive messages coming from RAN Managed Functions at regular intervals. If the E2 Termination fails to receive keep-alive messages for a defined time period, it will declare an alarm on that E2 connection to the corresponding Managed Function.
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