NTT to migrate TDM voice network to IP by 2025

Japan's incumbent wireline operator Nippon Telegraph and Telephone (NTT) has set 2025 as a deadline to switch over all of its existing POTS/ISDN lines to IP.

Of course, the all-IP drive will be done in a migratory fashion. Beginning around 2020, NTT plans to migrate its existing POTS/ISDN customers to an IP network over a five year period.

Both NTT East and NTT West, the two main operating companies of NTT, will inform its TDM-based customers of this transition and other service providers that purchase wholesale services from the Japanese incumbent.

Migrating its wireline voice network to IP is only one of NTT's network ambitions. Japan's Internal Affairs and Communications Ministry's master plan calls to have every home in the country connected to Fiber to the Home (FTTH) by 2015. Given the complexity of rolling out fiber to homes and educating consumers about FTTH, an unnamed NTT executive said it's doubtful they'll be able to reach that goal.  

For more:
- TeleGeography has this article

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