Its probably has a broken ALG (most of these modems have bad SIP implementations) I suggest you change your SER port to a non-standard one so that the ALG does not try to modify the packet. (We had to do that a while ago. Almost 40% of complaints comming in to us stemmed from bad SIP ALGs at routers and modems.

Andres
Network Admin
http://www.telesip.net



Rodrigo P. Telles wrote:

Hi Folks,

I've been having troubles with a DSL router (DSLink 200E) and SIP phones.
When I put any SIP phone (software or hardware) to work behind
that DSL router, it completely freeze.
I ready tech specs of that DSL router and it says that SIP protocol is
supported.
ie. I tested two DSLink 200E with the same results.

Does anyone has any idea?
Thanks in advance.


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