While copper lines account for just 5 per cent of networks in the US, Sambar noted a single copper line must be maintained all the way out to a customer’s location. There could be thousands of copper lines sheathed at a central office, which need to be maintained to serve the customer who is miles away with the single line. The copper lines also require massive switches in central offices to provide voice services, which Sambar explained use eight to ten times the amount of energy as a server. AT&T could replace the switches with two servers in a central office, which would cut down on the energy cost, but the servers will need software, installation and rewriting all the systems that were written in the 1960s or 1970s. All of which will cost more than keeping the switches. “The payback period is 15, 16, 18 years long so it’s not economical to do it,” Sambar said. https://www.mobileworldlive.com/att/att-makes-case-against-keeping-copper/ The long-term ROI issue AT&T’s network chief Chris Sambar raises was as relevant in the 1990s during the Clinton administration as it is today. Had telecom policymakers done a diligent job of assessing the costs and economics, they would have asked if investor owned telcos like AT&T that must generate returns on investment over relatively short periods were up to timely modernizing the legacy POTS copper outside plant to fiber and installing optical switches in COs and field distribution equipment. Timely as by the late 2000s. And if it was determined telcos were not, then alternatives such as public and utility cooperative ownership -- that the Biden administration noted in its original 2021 infrastructure bill don’t face the additional cost burden of earning shareholder profits -- should have been developed. None were. Telcos were left to deploying now obsolete DSL technology over decades old copper. Given the Biden administration’s recent assessment of the merits of the public and utility coop models and the ongoing ROI challenge facing investor-owned providers, the conditions for developing those alternatives remain in place today. Follow on Twitter @eldotelecom

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