asterisk users - Mar 2005 - 2 Asterisk servers (IAX) behind one firewall

Here's a good one for the group, I have 2 Ast servers behind a NAT
(Sonicwall :-( ) connecting to the same server outside the NAT. Each of
the 2 boxes behind register to the outside server. What I am wondering
is, would there be a problem if both servers behind the NAT were
listening on port 4569, I realized that the NAT'd port gets changed
however I wasn't sure if this would be an issue. The reason I ask is
we're getting a lot of call quality problems and even with CBWFQ (qos)
enabled, it doesn't make a lick of difference. jitterbuffer (no trunk of
course) is also enabled. I'm trying to keep this email short so I won't
go into detail. Thanks!

ascii layout:

(ast1) -- ATM -- sonicwall -- ethernet -- (ast termination)

(ast2) -- ATM -- ATM (don't ask) -- sonicw -- ether -- (ast termination)

	Matt