We offer two general types of cables:
"K 109.xx" with six pin plug at the headset end (unbalanced microphone connection), work with DT 100 / 108 / 109.
"K190.xx" with seven pin plug at the headset end (balanced microphone connection), work with DT 250 / 280 / 287 / 290 / 291 / 297, etc.
The "xx" figure describes the other end of the cable, be it an intercom beltpack, a camera or whatever. For chosing the right connector, you need to now plug type and pin assignment of the unit you want to connect the headset to.