Hello, I am running the LTE7490-M904 together with a Fritz Box 7490 and everything works except the telephony. My two Fritz Fon C5 and C6 cannot establish a connection. What do I have to change in the configuration of the Zyxel?
Thank you, Markus

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Hello
Have you been able to solve the telephony problem by now? I am interested in using a 4G or 5G router as a replacement for DSL (& landline).

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This is most likely because this Zyxel Outdoor Router does not support the DECT radio standard. We are not aware of any workaround. To increase the coverage of your issue, you could also post your question in the discussions.

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Question about Zyxel WL Router LTE7490-M904 LTE Outdoor Modem Router

Hello, I am running the LTE7490-M904 together with a Fritz Box 7490 and everything works except the telephony. My two Fritz Fon C5 and C6 cannot establish a connection. What do I have to change in the configuration of the Zyxel? Thank you, Markus