We have multiple issues with this fax not sending to some phone numbers. My immediate problem is on one machine, faxes appear to be sending, but recipients are getting either only a header or blank sheets.  This is to multiple customers, not just one fax number.  I have successfully sent faxes to another fax within our company, however, on this same machine.  I need assistance as we have 10 of these things and they're not exactly stable.