We have a Billion 7800VDOX. As of this week, on our Cisco VOIP phones outbound calls to mobiles don't ring or ring and then drop. No problem with outbound calls to landlines. No problem with inbound calls from mobiles.
iinet tested the lines from their end & there is no problem. All the settings in the modem are correct. iinet advised that there is probably a fault with the modem.
Can anyone recommend a good digital VOIP modem alternative to Billion?
Alternatives to Billion Modem for Digital VOIP

teasatotalling on 29/10/2015 - 09:38
Comments
No, because from time to time the call goes through.
It wasn't a problem for 9 months until a couple of days ago
i think U is the one for ISP's and R is for retail customers
Just found out they are exactly the same
http://bestwirelessroutersnow.com/asus-rt-ac68r-vs-rt-ac68u-…
What is your experience with using it for digital VOIP?
How long have you had it for?dont use any voip
I use the same model. No problems here running the latest firmware. Suggest restting to factory default and reconfiguring.
Fritzbox are supposed to be good.