- Built-in DTMF keypad, so no additional telephone is required.
- The program mix is sent to the radio station through the line.
- The return from Studios is received through the same line and directly mixed into the headphones mix.
RJ11 Pinout

| Pin | Function |
|---|---|
| 1 | No connection |
| 2 | LINE |
| 3 | LINE |
| 4 | No connection |