I want to summarize my first message above as follows. I can
not successfully forward/route my Voip.ms DID to my Voxalot account neither by registering my Voip.ms account with voxalot (as a provider), nor via direct sip uri at my
id@us.voxalot.com.
On the other hand, I can do it with my callcentric DID, both ways and it works just fine. Moreover, I can first sip uri forward my Voip.ms DID to my callcentric and then forward it to my Voxalot account and it works fine, too.