This gauge reports the current count of TCP connections on this virtual router that are in the ESTABLISHED or CLOSE-WAIT state at the moment it's read. It gives administrators a live snapshot of how many active TCP sessions the virtual router is carrying, useful for capacity planning or detecting an unusual connection pile-up. For example, an admin monitors csOrionVPNVRouterTcpCurrEstab and notices it climbing steadily toward the connection ceiling reported by csOrionVPNVRouterTcpMaxConn, prompting an investigation before new connections start failing.