On Dec 9, 8:09*am, jcarlyle wrote:
You're making an assumption that the Trig will actually work with no
ICAO address. It's smart enough to know when configuration is needed,
and automatically starts that process without going operational.

For me it's more my engineer's curiosity rather than an admission of
paranoia.

According to the TT21 installation manual the installation menu is
entered the first time it is powered up. After that an overt user
action is required to re-enter the installation menus. I don't have
one yet but if/when I do I'll check it out. (even though I'm not, I
say NOT, paranoid)

Andy