Netbackup Client network port 1556

Hi All,

I have several questions about the netbackup client network port 1556:

1. Is it only in use in version 7?
2. Is it really in use in client? (The reason why is the client also using port 1556 for Oracle  listener)
3. My colleague kill the PBX daemon  that use that port, why the netbackup still can backup/restore this client?
4. Is it possible to change the port?

Thank you.

Regard,

Iwan