[Asterisk-Users] IAX, IAX2 and authenticatyion

[Dan]

Hi,

I have some questions regarding IAX, IAX2 and encrypted authentication.

How can I know if IAX or IAX2 is used between two * servers?
There is any guide about how to configure encrypted authentication (not in
clear text)between two * servers?

I "hear" on this list a couple of days ago that port 5036 is the default one
for IAX and something else (4XXX) for IAX2.

Trying 'iax show channels' in CLI during an active channel between the two *
servers shows me that IAX is used.
What to do to use IAX2 instead?

Which are the main differences between IAX and IAX2?

Thanks a lot,
Dan