I came across this today while searching the Alpine website. It is a rear seat interferce adapter for your ipod. It is compatable with touch screens which leads me to believe some way it will work on our avic-z1's.
here is the site:
Its compatible with ALPINE touch screens. To use something like that with the z1 you'd have to use the ipod or the remote.
Control via touch screen TME-M770S, iPod, or Remote Control.
Yea it shows its only compatible with one Alpine touchscreen model. has to be an Alpine proprietary plug connector, like Pioneer has with the IP Bus connectors.
It is its call AInet.
Thank you two months later 
gotta love people who wont let threads die
Didnt even see that. oops. But i think i have seen a Pbus-AInet interface. But i dont remember where.
Didnt even see that. oops. But i think i have seen a Pbus-AInet interface. But i dont remember where.
No, the languages between the 2 are totally different.
I know the languages are different. But i had seen somewhere a converter from PBUS to AInet.
where at?
Thats what i dont remember. But i do remember seeing one about a year and a half ago. I would love to find it therefore i can use my SIR-ALP1 and other hardware from my W200.