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Cisco SPA525G
Updated 2,110 Days AgoPublic

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:
  • Outbound proxy:
  • Use outbound proxy: yes (otherwise, won't register)
  • User id: just your username (don't include
  • Use auth id: no
  • Use DNS SRV: yes
  • DNS SRV auto prefix: yes
  • Register: yes (if you want to receive calls)
Last Author
Last Edited
Dec 27 2016, 11:12 AM

Event Timeline

tijmen created this document.Dec 27 2016, 11:12 AM
tijmen edited the content of this document. (Show Details)