asterisk users - Aug 2008 - Why does a perfectly fine iax2 host becomes UNREACHABLE?

Hi,

I have two asterisk servers and I've created an IAX2 config on both as
below. The one server shows host as OK with <20ms and the oterh shows it as
unreachable? Please help.

disallow=all
allow=g729
trunk=yes
qualify=yes
qualifysmoothing=yes
nat=no
context=OutboundWS
transfer=mediaonly


Thanks Shaun

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