I was recently doing a PBX install for someone and they were using a Sangoma Gateway. At first, it looked pretty simple and straightforward. The instructions to configure it with Elastix were about as straightforward as can be. If only it worked that way...
I ran into many little obstacles that I didn't expect to see with this setup. First, we couldn't get a SIP account to register as the instructions told us to do. Then, fax information seems to be stuttering and not passing through the way it's supposed to. DTMF tones transmit in a way that is completely arbitrary to the settings that are mentioned. As icing on the cake, for some reason it felt the need to strip the first character of the CID off as well.
Am I just severely unlucky or has anyone else had troubles like these with gateway devices for a PRI?
I have never used these PRI gateways. I have only had to deal with FXO/FXS interconnections. I have read mixed reviews on the Sangoma brand. Generally, once up and working they are great, but sometimes people cannot make them work. Again I have no personal experience with them though.