My wireless PTT cradle does not seem to communicate with the Extreme Drive Dock.

Switch the wireless PTT handset on. If the wireless cradle is connected to the ExtremeDrive Dock, the handset will switch on as soon as it is docked in the wireless cradle.

Ensure that the PTT handset is plugged into the RJ45 port of the docking station.

The Iridium 9575 PTT device should be in PTT mode. The corded or wireless PTT handsets will not work when the Iridium 9575 PTT device is on phone mode.

The ExtremeDrive Dock's firmware version should be atleast at 1.4. Earlier firmware version does not support PTT mode.

The stick antenna or external antenna has to be attached (the antenna with the round tip connects to the wireless handset while the short stub antenna connects to the bottom of the wireless cradle)