• Call number to confirm a proper fax tone
  • Are they having issues receiving faxes in general?
  • Do they have another number to try?
  • Fax machine issues? (i.e. line issues, jams, out of ink)
  • What kind of device is being used to send/receive faxes?
  • Are they experiencing faxing related issues with other recipients/senders as well?
  • What is the error that is shown on the sender's end when there is a send-failure?