Home2008 Treaties and Agreements ...China (08-229 )- Agreement on the Establishment of a Secure Defense Telephone Link hide China (08-229 )- Agreement on the Establishment of a Secure Defense Telephone Link TIAS Office of Treaty Affairs February 29, 2008 Telecommunications: Defense Telephone Link Agreement signed at Shanghai February 29, 2008; entered into force February 29, 2008. Download attachment [518 KB] Tags China Telecommunications Treaties