The top 6 ports on the ETR module can be programmed as either ETR or T/R.
To change the programming - get into WinSPM - press system program, start/exit, extentions, more, more, ETR, keyin the ext number for the top port (or one of the top 6) and press enter - then highlight either ETR or T/R and press enter.
Tom Daugirdas,
President
STCG, Inc.
stcg.com