Hi, im new on this, and have no experience with fax operations.
I have a PBXIP and ATA FAXMachine, i set with G11a Alaw codec and making and receiving calls normally, when sending a fax, the machine does not send, it indicates that the process has failed.
Could you help me?
What information do you need my system?
Fax over IP is generally a terrible idea.
You should be using t.38 at a minimum. Other than that it is hours of tuning everything you can tune and you should expect 90% success if you get it perfect.