@Mrbher 

Are you saying you cannot make it repeat the wireless signal of your own vowifi router, but it can repeat the signal of your neighbors?

Can I have the hardware version of the extender? Is it V1 or V2? You can find that on the extender device label.

When you try to connect it to the vowifi router, will all the LED lights on the extender correctly light up as per the User Guide? 

If the extender cannot connect to your vowifi router successfully, please go through the following thread to do some basic troubleshooting:

Has connected to TP-Link extender but no internet, what can I do?

@Mrbher 

Thank you so much for your explanation. 

Generally, this extender only connects and extends the wireless network of the host network, it won't block any traffic if the host router allows it. Are you saying VoWi-Fi works fine when your phone connects to the host router wireless directly? Can I know the model of the router?

When the phone is connecting to the extended network, how about the wireless signal and speed? Is it as good as that when connecting to the host router? Or better or worse?

Mrbher wrote

 And for me I info, why isn't this thread shown in the forum? 

 

And push 😉

@Mrbher 

You can find the thread or reply you created in the User Center as follows:

https://community.tp-link.com/en/home/uc/post/3696122

If you're choosing a language other than English when posting, it will not display in the forum by default. You need to choose the language that you use, then you will find the thread:

Mrbher wrote

  @Kevin_Z 

Hi, 

 

When it connects directly to the router of avm and the wifi is not established over the repeater (its hard to say if the router is used or the repeater, because it's an reagion where the repeater can also be the one who do the connection) then yes it works well. 

 

Its now an avm 7430ax Router, but we changed before from an avm 7590 and there it was also this way and not working when the connection is established over the repeter.

 

The signal is brilliant when the Problem is (because it's 2m away) so this cannot be the reason. 

 

Bye

Michael

@Mrbher 

You may try to open ports 500 and 4500 for the phone that you want to use VoWiFi on the AVM 7430ax router. Please be sure that you're adding the correct MAC address for the phone when doing port forwarding on the router.

If possible, I would suggest trying to change the WA850RE to Access Point mode, connect it to the AVM 7430ax router via LAN cable, and then connect the phone to the AP's wireless network to observe if it can use VoWiFi correctly.