[c-nsp] Nat Issues With cisco Routers

[John Kougoulos]

On Tue, 24 Nov 2009, Lin wrote:
> I tried to do a "no ip nat service sip tcp port 5060" command. This removes 
> the "482 Loop Detected Error" and allows the client ip phone to register. 
> However, outgoing calls fail, because the SBC on the other end responds with 
> an "403" error. Apparently, the header being submitted is not acceptable.
>
> Anybody come accros this before?
>

I think that at least in CBAC, IOS 12.2 couldn't understand compact sip 
messages. I don't know if this is still an issue, but you may try to 
change your phone to not use compact headers.

Regards,
John