We have an Ooma office and a HP OfficeJet 8600 for our fax machine. The fax machine is directly connected to the ooma office, and an office phone is connected to the second phone port on the fax machine, which can make and receive calls fine. The baud rate on the fax machine has been set to 9600 (slow) and ECM has been disabled. We are able to send and receive from HP’s test fax number 1-888-hpfaxme (1-888-473-2963) successfully. We can receive faxes from other offices thus far, but have had no successful faxes sent. While trying to send a fax, we have never exceeded 4 pages, and have tried to send even a single page, all resulting in failures thus far. Our ISP is Comcast, with a rated 16 mbps down 3 mbps up. Our real world bandwidth meets or exceeds these numbers.
Can anyone recommended any other settings to change on the fax or Ooma?