Ambrose,
To clarify my previous statement, Smartvoip must be set up as a non-registered provider in Voxalot to support
outgoing calls.
This can be done as a free or Premium Voxalot user.
To benefit from the Betamax Free Use period, your SIP device should be registered to a voxalot server (us.voxalot.com, eu.voxalot.com, au.voxalot.com).
In addition, you need a Smart Call / Dial Plan set-up in Voxalot to route your call in the right format (00+Country_Code+Number) to SmartVoip
The simpler the configuration, the more reliable it will be.
My suggestion is to stick with SIP Device registered to Voxalot with outgoing VSPs as needed. (SIP_ATA --> Voxalot --> SmartVoip)
For incoming calls, use call forwarding to
xxxxxx@voxalot.com or register the specific VSP in your Voxalot account (this requires a Premium subscription).
As emoci points out, the Provider Index is an information database, and is not related to how you set up or use a provider in your account.