回复：Not sure what exactly you are asking, See my 2 cents inside.

Confused somehow.

"I assume that you have one working SPA1001 already, and now you want to test the new one". Yes, this is waht I want to do,

"you can't have two ATAs that have the same account setup in the network regardless their IP addresses. As both ATAs will try to register using same credential(user name& password) at the VOIP provider server, the server will be confused". It make sense that I can't register two ATAs with the same VOIP acct# at the same time. How about one at a time with the same VOIP? Or just can't do anyway?

Thanks.