We noted in our blog a week ago that over the next decade, the PSTN (public switched telephone network) as we know it will go away– replaced by a public VoIP infrastructure. While the economic and feature benefits are abundant, so too are the potential pitfalls. One of the biggest obstacles is that the current PSTN serves as one giant gateway for other VoIP services that may otherwise be incompatible, allowing for call routing and different voice codecs at source and destination to interoperate because they both use the PSTN in the middle.