Albatros2 ok then I’ll check with Studerus because with the IB in front of the FB there is 8Gig in both directions

cybi it’s always the case that 3Party solutions are not as optimised (speed-technically) as the devices from SC.
See also back then with vectoring and G.Fast with AVM.

user109 user109

that may have been the case in the past, but with the standardised XGS-PON, other manufacturers also achieve full speed.

Let’s see what the manufacturer has to say.

user109 See also back then with vectoring and G.Fast with AVM.

At that time I had about 5-8% less speed on DSL with the FB compared to the IB

Here we are talking about a 50% drop in upload speed with fibre, which in my opinion should not be the case.

In the meantime I have noticed something else.

VoIP no longer works. Neither via Fritz nor directly on the Grandstream. Setting it up again didn’t help either.

I’ll probably have to try the Zyxel again 🤨 although there’s not much to set as a pure bridge.

@Albatros2

Answer from Studerus who have clarified it with Zyxel:

Basically there are no restrictions with the PM7300.
The device takes over the provisioning settings from the OLT side.

cybi then it is 100% due to the FritzBox that you have problems with SIP.
You probably have no choice but to analyse where the problem lies with Wireshark or
Create a test account with the SIP provider and test it.

user109 VoIP is now working again. It was just a tiny little setting error.