> Contributed by David Martin
This is the minimum config for Cisco SPA525G that allows me to send and receive SIP2SIP calls from behind a residential NAT.
Go to Voice / Ext 1 (or whatever extension it is) / advanced:
* NAT mapping enable: No
* Proxy: sip2sip.info
* Outbound proxy: proxy.sipthor.net
* Use outbound proxy: yes (otherwise, won't register)
* User id: just your username (don't include @sip2sip.info)
* Use auth id: no
* Use DNS SRV: yes
* DNS SRV auto prefix: yes
* Register: yes (if you want to receive calls)