Now you have to create a link to voip.ms. This is done with trunks.
The username and password are those of the account or subaccount in voip.ms.
You need subaccount in voip.ms when you have multiple ATA connected.
This is also where you put the Caller ID name you want to appear when you call.
The SIP server or proxy is the one you use in voip.ms.
For register, select in and out.