I recently noticed on on my 436HP I was not getting tone outs.My 396T that hasn't been updated in 10 years still did.....Long story short turns out a few months ago someone changed/updated the database. while it added some frequencies it changed the Toneout frequency to 156.0600. This is in fact not the correct frequency for Campbell toneouts. It has never changed, The actual frequency is 155.1900. The database needs to be changed to reflect the old ACTUAL toneout freq.