3300 MXe 2-Clustered Rel 4.2 / 10.2.0.26_2 EMB-VM 6-SX200 10-ASU
So I've worked on tracking this, with no results. I have 500 - 4025 phones in the hospital. Once or twice a month, i get called about a phone ringing, shows FX analog in the display, pick up the handset, it's busy tone. This can go on for a couple hours before it stops. I've verified the phone prime number receiving the call is an internal number, not a DID call from the outside. So it's happening from within our system. We of course have like 50 fax units, some on Mitel analog extensions. If it really is a fax, why when you pick up the handset, you should get fax tones instead of the busy signal. Also, I checked SMDR and nothing shows for calls going to that extension, except a verified call from another phone.
Any clues for where I might look to track this would be greatly appreciated.