I have Afihost fibre, using a D-link DIR-825 AC1200 router.
I also have a Huwaii B315 which has a Ethernet cable coming from the Dlink into it's WAN port. My analog phone is plugged into the B315.
I've followed all the instruction on the settings page of the B315 in the forums but it constantly says that SIP account is "unregistered".
another note, I installed zoiper and that registers perfectly fine when
i'm connected to either of these routers. I can also ping "sip1.freshphone.co.za" perfect fine.
Any advice to get the analogue phone working would be great.
Have you disabled SIP ALG on the B315? Have you tried using the B315 analog port without the DLink plugged into it?