I want to route some calls to my VoIP number a call center overseas. The call center is telling me that I need to do a "gateway to gateway link" in order to make this happen. I'm not exactly sure what that is and can't seem to find anything on the net about it. I'm new to VoIP and want to be able to have an intelligent conversation with the call center provider.
What is a "gateway to gateway link?" And will I suffer any degradation of voice quality by doing this?