Network Box ITP-M-295i
To disable the SIP ALG:
-'module proxy-appid-navl' & 'module proxy-appid-navlite' both appear to act as application layer gateways. They should be set to 'disable'.
-disabling these modules caused no lapse in network connectivity, but the changes do not apply until after restarting the Network Box router. Restart the router from the menu on the front of the appliance.