RingBack Skype for Business

We are looking for a Skype for business professional that can solve the problem we have with the fake ringback that Skype for business delivers. We want the ringback to be the one that delivers the carrier that processes our calls. We installed a Polycom VVX500 as a Skype for business user and it works perfectly delivering the ringback of the carrier that processes the calls. We need the Skype for business softphone to perform the same as the Polycom VVX500