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How to extend analog line using VoIP with SPA8800

I would like to use a SPA8800 to make an analog line available to a VoIP phone (because at the location of the phone only LAN is available and no phone line). This is, when the line rings, the VoIP phone should ring. It would be nice to have if the VoIP phone could also use the line to dial out.

I already have the SPA8800, furthermore I have a SPA941 phone.

PSTN ----- line ----- SPA8800 ----- Ethernet ----- SPA941

Can you give advice on the necessary configuration for the SPA8800 for this setup? The few guides I could found were all for the other way around (Internet ----- SPA8800 ----- analog phone).

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