[1] Digital Telephone Controller (siehe ARCOFI und IBC und ICC)

[2] Digital Transmit Command - Datenpaket bei der Fax-Übertragung

[3] Data Transmission Center (->"IEEE Standard Dictionary")

[4] Data Technology Corporation

[5] Design To Cost

[6] Di-group Terminal Controller

[7] Digital Trunk Controller

[8] DeskTop Conferencing.