Constant Trouble Tone on NHX Master Station

Constant trouble tone on the master station. All other functions work normally, but trouble tone is always sounding.

Break in the wire to NHR-SP or no jumper in CN-104.

Check wire connection to NHR-SP. If no duty station is used, then make sure that there is a jumper in CN-104 on NHX-80X.

(No jumper on CN104 if Duty Station is included. INSTALL jumper if there is no Duty Station connected.)