Jeff,

The 32 should be in Connect mode when the ST 6 turns it ON.  

Local and other 32 Telex modes are not used.  

When you hook up the Telex to the ST 6 the Telex should either shut off or be in Connect mode.  If it shuts off, reverse leads.  Not too familiar with ST 6 but my ST 5000 has a power plug on the back to plug the Telex into. 

I looked up the ST 6 and there is a power plug on the back.  Its labeled Motor.

If you want to just fire up the TTY there should be a Local button on the ST 6.  Not sure of this but others on the list likely are.

73,

Wayne 
KB1FDW