Swerv
For future reference, what details did IDNet provide to you in the end apart from SIP username & password and SIP server name?
Hi Arctophile. Details as follows:
The various domains were sbc.insmartcloud.com (that's SIP, Proxy, registrar)
Proxy server port 5060
Registration refresh - 120s
Outbound proxy - No
Sip Password - as provided
Sip ID - as provided
Username - as provided (this was the crucial last bit of info for me I think as the guide they provide suggests it's just the phone number and it wasn't)
They suggest that SIP ALG should be disabled. In my Asus it refers to "SIP passthrough" and a Google search suggests that should be disabled, but in the end ours is working with that enabled.
On top of that I also bound a static IP address for the N300. Again not sure if this was necessary as I did this before that crucial last bit of info from IDNet above, but as it's working I haven't changed this back.