hi there i have a cisco 7940 ip (and a mitel 5220)phone, i cant get either to register with any outside sip servers,i basicaly want sip to sip phone,with a sip number, im useing sip2sip.info wich uses proxy.sipthor.net
the sip softphone works no problems
and i have a 3cx sip server wich the phones connect to fine.

the service uses
sip2sip.info as the registrar server and
proxy.sipthor.net is the sip server,

any idea how to make it work for outside calls?