considering that Recommendation F.200 defines the Teletex service;
that Recommendation T.60 defines the terminal characteristics for Teletex;
that Recommendation T.61 defines the character repertoire and coding for Teletex;
that Recommendation T.62 defines the Teletex control procedure;
that Recommendation T.70 defines the network independent transport procedure;
that Recommendation T.90 defines the Teletex requirements for interworking with telex;
that compatible implementation of these standards is necessary for successful development and acceptanceof the service