This guide was created for the SonicWall TZ-SOHO router with Firmware Version This has the newer GUI version and looks quite a bit different than the GUI that had been used in previous years. FusionPBX is in the cloud with a public IP, and the TZ-SOHO router is at the customer’s location with the extensions behind it.

How to Disable SIP ALG

  • Log into the router
  • Click the MANAGE tab at the top
  • On the left menu, go to System Setup-> VOIP
  • Check the “Enable consistent NAT” box
  • Uncheck the “Enable SIP Transformations” box
  • Click ACCEPT