> ensure internet calling is disabled at the sipx server. 
> ensure the Ip address/subnet is unique and not listed in your 
> intranet subnets in sipx.

Not that it has anything to do with the problem being reported here but
remote private networks and the local private network (the a private
sipXecs is sitting in) do not have to be unique.  All these network can
overlap each other and remote phones are even allowed to have the exact
same private address as the sipXecs (as long as they are not in the same
private network, but that goes with saying).



> 
> 
> On Mon, Feb 22, 2010 at 3:30 PM, Max Clark 
> <[email protected]> wrote:
> 
> 
>       Hello,
>       
>       I have a sipx server running on a statically assigned public ip
>       address. I need to support far end NAT for remote users 
> (ATAs behind a
>       home firewall). I have a Grandstream HT 286 that we are 
> experimenting
>       with. Initially I connected the ATA to our office DHCP network,
>       autoconfigured the device from the config server (tftp) 
> and everything
>       works fine. Moving the ATA behind a linksys router and 
> receiving a
>       DHCP assigned NAT'd address the device can still 
> connect to tftp,
>       register with sipx, make outbound calls to the PSTN and internal
>       extensions, but cannot receive calls from internal extensions.
>       
>       Servers -> <server> -> NAT -> Use STUN
>       System -> Internet Calling -> NAT Traversal -> Enable 
> NAT Traversal
>       
>       <phone> -> SIP -> STUN Server -> "stun01.sipphone.com"
>       
>       This is on Sipx 4.0.4-017289 2009-11-19T18:15:29 ecs-centos5
>       
>       Thanks,
>       Max
>       _______________________________________________
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> http://list.sipfoundry.org/mailman/listinfo/sipx-users
>       sipXecs IP PBX -- http://www.sipfoundry.org/
>       
> 
> 
> 
> 
> --
> ======================
> Tony Graziano, Manager
> Telephone: 434.984.8430
> Fax: 434.984.8431
> 
> Email: [email protected]
> 
> LAN/Telephony/Security and Control Systems Helpdesk:
> Telephone: 434.984.8426
> Fax: 434.984.8427
> 
> Helpdesk Contract Customers:
> http://www.myitdepartment.net/gethelp/
> 
> Why do mathematicians always confuse Halloween and Christmas?
> Because 31 Oct = 25 Dec.
> 
> 
> 
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