Thank you so much for your help so far, while I am still struggling on setup of my SPA3012 for VOIP.
Basically, I set my ATA line 1 on voipdiscount, now, I can call out, (after editing dial plan, guess the dialing will be simpler). Then if I could have the ipkall setup right. I can receive call by GV#>>ipKall#>>my ata. Right? If I understood right, I would study online on how to make my ipkall and ATA setting right. Thanks.
By the way, apparently, I need another ipkall#, the current one can not be added into GV#, two more others already did that, but could be expired.