[asterisk-users] Teliax problems, they say use SIP, more mature & better working than IAX

[Andrew Joakimsen]

I really have lost loads of faith for IAX. "No authority found" and
"Rejected connect attempt" messages for no apparent reason. Sometimes
computability issues between asterisk versions. Fax/T.38 support?? But
I have no complaints about when it actually does work.

Not that Asterisk has the best SIP implementation either...