Incumbent Telco VoIP Transition is Not Technology-Led

The fact that AT&T has asked the Federal Communications for a definite date to shut down the public switched telephone network is, like most regulatory filings made in Washington, D.C., more complicated than it might appear.

Virtually all telecom service provider executives believe IP voice is the future, whether in the mobile or fixed domains. But the economics of the transition are complicated, at least for an incumbent provider.

Attackers, such as cable companies or independent VoIP providers, have no installed base of customers to cannibalize. Incumbents most certainly do, and that makes all the difference in perspective.

A Verizon executive recently noted that, “at this point in time, the business case does not support a technology-led migration off of the PSTN with the combination of land line loss, the economy, competing priorities and competitive dynamics.”

The key phrase is "technology led." Cable digital voice, Skype and Vonage build on VoIP: the technology directly supports the business case.

For an incumbent telecom provider, the technology in some cases harms the business case. To the extent that VoIP services largely replace an existing service with no incremental revenue, added investment is not met by added revenue. To the extent that VoIP services are priced lower than the voice services they replace, the business case is negative.

Under such circumstances it is rational to harvest PSTN voice as long as possible, despite market share losses. At some point, the logic reverses, however. As the fixed costs of the old PSTN are shared over a smaller base of customers, it will at some point be advantageous to switch to IP voice, strictly on the basis of operating cost savings.

That point has not yet been reached, but it is inevitable. The issue right now is what regulatory regime will apply to incumbents as that transition occurs. And one might argue that is the real point of the AT&T request for the FCC to specify a firm timetable for shutting down the PSTN.

The replacement of PSTN technology with IP telephony also creates an opportunity for new rules about carrier obligations that directly affect the costs of providing such service. That is why the AT&T request also argues that legacy rules must be altered as the transition is made.

Those rules are arcane and of little visible consequence for the typical consumer user of fixed voice. But they have enormous impact on the voice business case, as viewed from an incumbent perspective. Basically, all the rules that govern how networks compensate each other for terminating traffic are the heart of the matter.

So incumbent sunsetting of the PSTN will not be "technology led." The institutional and business frameworks remain the key issue.