The Telephone JJY service is scheduled to be discontinued at the end of March 2024. With the conversion of the telephone system from an analog line-switched system to a digital packet-switched system, we expect that the Telephone JJY system will no longer be able to provide the required time synchronization accuracy. NICT will therefore end the operation of the system.

If you wish to continue using a telephone-based time synchronization service, please migrate to Hikari Telephone JJY.