Open Interface FSK configuration

1. Tumbler switch DTR/RTS on back side switch to ON
2. Download EXTFSK and copy to you MMTTY directory
3. in MMTTY setup select PTT&FSK Port as EXTFSK
4. Misc tab settings TX Port select COM-TxD(FSK)
5. and USB port options select C
   
6. After press OK in setup open automaticaly EXTFSK window. Select FSK to DTR and PTT to RTS