I'm trying to setup faxing to email on the UC540. I've got the latest software pack on it and "T.37 fax to mail" is enabled and configured. I'm only using SIP trunks for inbound calls. (I know fax over sip isn't reliable, but this is just for an as needed type of thing). When a fax is attempted, the sending fax machine dials and the UC540 auto attendant answers. But about 5 seconds into the call, the UC540 drops the calls and the fax is never attempted. Any idea what would cause that?
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