look to this thread.
PTT over Ethernet
SDR-Console supports PTT-IN (USB to TTL Adapter) and PTT-OUT (HID kompatible USB-relay).
The USB to TTL-Adapter should contain a FT232 Chip from FTDI. A status line can be configured and used with a microfon button. It works with VOX also.
The output relay must follow the HID-Rules (Human Interface Device).
To bring the PTT-Signal to the amplifier use two POE-Adapters on each end of the Ethernet cable. There is no distance limit.
The GPIO-Port of the Pluto gives a PTT-Signal also. This requires firmware from F5OEO. Unfortunately there is a delay of about 800ms between Tx on and PTT-out at the GPIO-Port. Evariste, F5OEO told me, this can be reduced.
There is no matter for DATV. But fast SSB-Talking is much better without this delay.
That's why, I prefer the POE-Adapters.