Bricks and Bits

La telefonía de conmutación de circuitos en declive

La denominada PSTN (Public Standard Telephone Network) la telefonía fija convencional tiene cada vez menos «abonados» mientras que la telefonía móvil y la telefonía IP tienen cada vez más usuarios.

Esto preocupa a los operadores y a los reguladores, que, como en el caso de la FCC – Federal Communications Commission, desean minimizar el impacto de la transición que acabe finalmente con la telefonía fija convencional. Y ello se aprecia en esta presentación.

Problem/Opportunity Addressed:

As the number of subscribers on the PSTN falls, the cost per remaining customer increases and the overall
burden of maintaining the PSTN becomes untenable. A fast transition can generate significant economic
activity and at the same time lower the total cost

  • Today’s demand for communications is much broader and requires much greater bandwidth
  • Cord‐cutting’ is already happening organically at impressive rates.
    1. Wire‐line to Wireless displacement
    2. IP based network replacement/substitution for fixed and mobile communications

Key Questions:

  • What is the size of the PSTN transition for Service Providers?
  • How can we further accelerate this transition?


  • By 2014, the United States will have fewer than 42M access lines
  • Access line losses were nearly 6.6 million between 2Q09 and 2Q10, a drop of 7.3%.
  • By 2014 US consumers will have 31.6 million VoIP lines accounting for 42.5% of all U.S. access lines.
  • Fixed lines continue to decline; mobile is the preferred choice for voice communication.
  • More than 25% of U.S. consumers aged 18 or older have already given up their voice landline for voice wiress‐only service.