[Asterisk-Users] Does it mean I was blocked by STUN?

[Hiu Yen Onn]

Hi all,

I have 2 respectively networks, LAN A and LAN B, connected via my 
wireless links and routers. I have setup an asterisk machine at LAN A. 
It works fine when i was in LAN A. But, when i was in LAN B, xlite 
client can get connected to the server. But, it has no sound when i try 
to make an echo test. Does it mean, i was blocked by STUN? I have a wild 
search on google, i found that asterisk doesnt really support STUN. What 
is the workaround to make two network clients enjoy the intercalling via 
asterisk? IAX???? please advise... thanks