Once it fails connecting with one SIP server, the phone adapter checks the next SIP server using the DNS SRV record, I believe. That's probably why east01, west01, sip, central01 are all trying to talk to your adapter. I think if you turn off SPI, you should be good to go. If it still does not work, then change the local port for Line1 from 5060 to something like 5062.