Registration process

We are still on the process on configuring the voip gw here in our ofc. We also have another voip partner in location. My proble is that, When I tried to make a call(outbound) using my sip phone the call was successfully completed. But when we tried to do a test on the incoming call
the server on the other end encounters an error, “404 not found”. One of our developers told us that the server must register in our voip gw box. Can we configure our VoiP gw to just allow the packets from the other server without the registration process. Is this possible?



you’re gonna have to post more details about your setup. what gateway, what server, who’s registering where etc etc. who’s your sip phone registering with ?