Oracle : Ошибка ORA-06108

"NETTCP: connect to host failed"
*Cause: Connection attempt to remote host has failed. Probably means
that the SQL*Net TCP/IP server on the remote host is not up,
or the host itself is not up (check the latter by targeting
it with Telnet).
*Action: Start the SQL*Net TCP/IP server process on the remote host.

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