Cant receive calls with certain VSPs
I have registered 4 accounts with different providers (Pennytel, Faktortel, Mynetfone and Freshtel) on my Voxalot account, and registered my SPA3000 ATA to my VoXaLot account. I do not any forwarding set on my account. When I call two of these numbers (Pennytel and Faktortel), my SPA3000 rings, as expected. But when I call the other two (Mynetfone & Freshtel) I just get an engaged tone.
At first I thought it was because the latter two block incoming calls from other providers. But the more I thought about it, from the providers' perspective, these would be outgoing calls, not incoming.
Can anyone offer an explanation?
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