Sending Fax via HT502 ... issues


Trunk is registered, incoming faxes no problem, but outgoing is hit and miss. Will work for 3-4 days then they can’t send anymore. Replaced the fax machine, replaced the ATA, same issue. It will come up on its own, and then quit again. Any ideas?

  • HT502 EOL
  • If you did those changes and the problem persists, HT or wrong NAT settings


This cap is useless, it not show any RTP. So it is mystery what fax do :stuck_out_tongue.


Flip between T38 and G711 Passthrough codec’s.