How do you join a contact between two stations using the PACTOR protocol?
Send broadcast packets containing your call sign while in MONITOR mode
Transmit a steady carrier until the PACTOR protocol times out and disconnects
Joining an existing contact is not possible, PACTOR connections are limited to two stations✓Bonne réponse
Send a NAK code
Explication
PACTOR is a connected link between exactly two stations, with the receiving end acknowledging each block, so there is no mechanism for a third station to join. Other stations can only listen in monitor mode; transmitting a carrier just adds interference.