[App_rpt-users] Passing CTCSS / PL Tone Over The Network

Can anyone help me with eliminating passing CTCSS / PL tone from a receiver discriminator onto the network? I am using an URIx FOB with external ComSpec CTCSS / PL decoder and squelch gate COR. The 167.9 Hz CTCSS / PL tone is really noticeable while listening using IAXRPT and occupies 50% of the green bar graph. I realize adding a High Pass or Notch filter would help but is there a configuration setting change that will eliminate the tone? Thank you, Chris Hill K7AZ