I've been using Sipgate happily on a Fritz!Box router, on a TalkTal;k line for a couple of years, no problem at all. I have regular phones plugged into the Fritz phone ports. We use it for a second (domestic) line, as my wife uses the landline for her work,
Now, when I had the YouView box installed by TalkTalk,my VoIP no longer works properly.
TalkTalk provided a Huawei router, but I swapped it and put my Fritz back. The YouView works fine, but now VoIP calls always start ok, then a delay of around five seconds appears (apparenlty on the outgoing voice) .
Sipgate say the problem is the TalkTalk line, and TalkTalk are looking into it.
They deny that there is any traffic shaping or prioritisation going on.
To co-operate better with TalkTalk, I've put the Huawei back in, and running the Frtiz off it. using LAN 1 on the Fritz as the uplink.
In this setup, The Fritz still gives Internet access, and calls can dial out, but the Fritz won't ring the phones that are attached to it...
Any thoughts or help is welcome.