How to attach an Analog Fax Machine/Printer

We recently activated VoiceEdge service and I have a Brother MFC-9120CN Printer/Scanner/Fax machine and I need information and/or guidance on getting the fax portion to work. I can call the fax number from my cell and after 6 rings (it is set for 2 rings) I will finally get a fax squeal response. However, if someone sends a fax, it just rings forever and never picks up. Do I need anything to make it work?

I picked up an Obitalk ATA adapter tht is supposed to work but it requires a registration that needs the following information :

Service provider Proxy Server

Outbound proxy server (if needed)

SIP username

SIP password

URL (if needed)

I don't know how or where to get the required information.

Can anybody help or guide me how to get my fax machine to answer?

Thankyou,

Craig