I've just discovered that the notes-mib V6 has the correct subtrees.
notes-mib V1 doesn't have these subtrees I need to monitor.
Would it be possible to add the notes-mib V6 to the mib database ?
You can create a Universal Device Poller and add the OID yourself.
Have you checked out Chapter 16 of the Orion NPM Administrator Guide, Monitoring MIBs with Universal Device Pollers? It's on physical page 213. Or you can find a section of it here. Use the arrow keys to move back and forth through the document.
Also, if you want the device added to our SysObjectID database, post the info to Tell us your "Unknown" devices! thread.