PA1688 Reference Settings     SIP Name Referrence Setting Service Provider Palmmicro IP-PBX asterisk_pbx_sip_us.html palmmicro.com Sipgate sipgate_sip_us.html sipgate.com SIPphone Gizmo5 sipphone_sip_us.html sipphone.com (Google bought it and closed it) VoipDiscount voipdiscount_sip_us.html voipdiscount.com VoIPtalk voiptalk_sip_us.html voiptalk.org     IAX2 Name Referrence Setting Service Provider Palmmicro IP-PBX asterisk_pbx_iax2_us.html palmmicro.com     Settings Tips SIP Protocol Settings {nat traversal: stun} {debug: no check} Other Settings {password}