Have a look at this tutorial about SIP and NAT problems, it might help
you...
http://www.asteriskguru.com/tutorials/sip_nat_oneway_or_no_audio_asterisk.html


Zoa

David Romero wrote:

now i forward ports 10000-20000 to my asterisk server but the problem
is the same.
i not understand wy not work


---------- Forwarded message ----------
From: *Holden Hao* <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
Date: Jul 28, 2005 9:09 PM
Subject: Re: [Asterisk-Users] Nat Transversal
To: David Romero <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>

On 7/29/05, David Romero <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
wrote:
> i try whit other codec but not work.
>
>  i try the phone on other site,
>  and work nice just one time, i not change anyting and reboot the phone
>  after reboot not work anymore,  if change the public ip address of my
> router the phone work again just one time
>  how i can fix it?.

Your Asterisk has a private IP, right?  Check that you have properly
forwarded all the ports  required.  Apart from 5060 for SIP your need
to port forward the RTP ports 10000-20000 to your asterisk server.


Holden


--
David Romero
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