Obihai 202 wont register

[mrjoli021]

I have an Obihai 202 and I am having problems registering it to my SIP provider.  I keep getting "Register Failed: 401 Unauthorized".  I am able to make outbound calls to my provider, but no incomming.  If I keep on refreshing the ObiTalk SIP setup page and eventually it registers, but when I unplug it or make any changes I get the same issue again.  Sometimes it will register after several save attempts, but sometimes I have to click save and refresh more than 10 times before it will register. 

Through this process I am able to make outbound calls, but not recieve any calls.

Any suggestion on getting the ATA to register all the time?

[gderf]

Do you have SIP ALG capability in your router? If so disable it.

[mrjoli021]

I am using ATT Uverse and from what I read in another forum the ATT router has ALG on by default and cant be turned off.

Is there an alternative solution besides switching ISP's?

[gderf]

Can you get the ATT router put into bridge mode and use another router?

[mrjoli021]

Right now I cant do this, but I added the router to the DMZ and still wont register. I will take it with me tomorrow to a different location and see if it will register.

Thanks