[1] Trunk/Transit Network
[2] Transit Node (in Reference Configurations)
[3] Tone (C/I channel code: wake up signal)
[4] Technical Note
[5] Transaction Number
[6] Twisted Nematic
[7] Tennessee - USA-Staatenkürzel
[8] ISO3166 2LA (= Ländercode bzw. TopLevelDomain) für Tunesia