I am not sure if the output from Zaon is TIS or at least the same format as 330 but I know it is incompatible with the data out of a 330.
I had a 330 connected to my GRT and it was displaying traffic, then I decided to buy a Zaon and connect that to the GRT. Even though that I had turned off send the info on the 330, it was still corrupting the info so traffic would not display. Now my Zaon is connected only to GRT and 330 is connected to the 430. The advantage is that I can compare the two when TIS is available.
Mehrdad
RV7A- IO360M1B