I have been using Slingshot Fibre connection for a while now with my Fritzbox7490. I also had my land line working till last Friday 3rd of April when my modem sent me a notification what phone is not working.
After some digging around I can see in the modem it is logging the following entries
Registration of Internet telephone number ([number]) failed. Remote site reports reason for error: 401
Registration of Internet telephone number ([number]) failed. Remote site reports reason for error:403
I also noticed that Proxy server which I used till now also changed from 184.108.40.206 to voice.slignshot.co.nz (220.127.116.11). Even after changing the proxy server to 18.104.22.168 ( I tried both DNS and IP) still I am unable to register my phone no with Slingshot.
What password do I use? Did slingshot change password also with the backend server?
I did try calling Slingshot Tech Support and they want me to use their provided modem which I am reluctant to use.
Does anyone here have the similar issue ? And is there any resolution to make Fritzbox7490 work again?
Please note my internet is working fine with Fritzbox7490.