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Tijmen de Mes, 01/18/2016 10:52 am

SipDevices »

Cisco SPA525G

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)
  • Make call without reg: yes (if you want)