Why do we need Certificates on the OCS Servers?
Certificate is required to enable an OCS server for SIP
over TLS communication. SIP is a session layer protocol
and it needs a transport layer protocol as well before
it can be used to deliver packets from source to
destination. For OCS Server to OCS server communication
we don't have much choice, we need to have MTLS enabled
on both the OCS Servers. For an OCS client to
login we can either go for SIP over TLS (Cert required)
or SIP over TCP (Cert is not required).
Certificates in different scenario