Not trying to skew the thread in a different direction, but since we're on the topic of the text to speech and someone earlier mentioned the EID from M that enables the Text to Speech option, I can't find a definitive answer. I know it will work on the 7550, but does anyone know if it'll also work on a 3500e? The 3500e has the voice announcement selection area in CPS, but before I ask my dealer for keys for my radios, if the 3500e doesn't work with it then I won't order keys for them.
Any help is always appreciated! Thanks.