Just wanted to update everyone that I did get it working.

It was the SIP ALG on my Cisco router.

Here was the fix:

no ip nat service sip tcp port 5060
no ip nat service sip udp port 5060


Thanks !

B

On Thu, Mar 25, 2010 at 8:43 AM, JOLY, ROBERT (ROBERT) <[email protected]> wrote:
>>
>> To me that looks like whatever router you are using in front
>> of the phones is doing NAT compensation via a SIP ALG.
>> Sometimes it's difficult to disable the ALG, depending on the router.
>
> I concur with you.  Either that or the phones have STUN enabled.
>
> Does x-lite work properly when you put it in the same private network as your 
> polycoms?  If it does then this is a clue that Polycom is doing something 
> like STUN.  If it doesn't then it points to your router.
>
> One more thing.  You say that your x-lite registration looks like:
> <sip:[email protected]:28436;rinstance=b83c40108342c5fb;x-sipX-privcontact=74.2.3.4%3A28436>
>
> This does not appear normal to me.  Basically, the contact should show the 
> public IP address of the x-lite whereas the x-sipX-privcontact should show 
> the private IP addresss.  In your case, they are the same thing - this is 
> indicative of some sort of misconfiguration but not sure where.
>
> Please review 
> http://wiki.sipfoundry.org/display/xecsuserV4r0/Remote+User+NAT+Traversal to 
> make sure your setup is sound.  Keep us posted.
>
>
>
>
>>
>> Could you post some information about what networking
>> equipment you are using, particularly what firewall you're
>> using on both sides.
>>
>> [email protected] wrote:
>> > Hello all;
>> >
>> > I am playing around with setting up my test phones (Polycom 650 and
>> > Polycom 321) to connect to a SIPx server with a public IP, and the
>> > phones are behind NAT.
>> >
>> > I have enabled NAT Traversal under Internet Calling, and I have
>> > removed all subnets from Intranet subnets.
>> >
>> > IP of Server : 74.1.1.1
>> > IP of Phones : 192.168.1.130 and 131
>> > External IP of NAT : 74.2.3.4
>> >
>> > I am seeing the phones regsitered with the nonat option.
>> >
>> >
>> sip:[email protected]<sip:[email protected]:1178;transport=tcp;x-sipX-nonat>70
>> > 8 sipxecs
>> >
>> sip:[email protected]<sip:[email protected]:1063;transport=tcp;x-sipX-nonat>13
>> > 25 sipxecs
>> >
>> >
>> > Am I missing a step on configuring something to have the Polycom
>> > phones connect as a NAT client? I have X-Lite working just fine:
>> >
>> > "Test Phone"<sip:[email protected]>
>> >
>> <sip:[email protected]:28436;rinstance=b83c40108342c5fb;x-sipX-privcontact
>> > =74.2.3.4%3A28436>
>> > 611  sipxecs
>> >
>> >
>> > I am using the following BootROM and SIP App:
>> >
>> > spip_ssip_vvx_3_1_3RevC_release_sig_split.zip
>> > spip_ssip_BootROM_4_2_1_release_sig.zip
>> >
>> >
>> > Thanks,
>> >
>> > B
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>> >
>>
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