Analog phones => SIP phones?

Question

Telephony

There is a PBX with several free analog lines, you need to forward these lines via Ethernet to a neighboring building.
those. the input is 8 analog lines, the output requires 8 SIP accounts to connect fixed SIP phones.
As I understand it, an FXO gateway is needed, but those that I looked at require some other IP PBX, and cannot directly translate to SIP phones.
Tell me what is the best way to do it? Of course, cheaper is better, but this is not the main argument.

Answer 1

For example, there is a gateway https://ipmatika.ru/products/voip-fxs-fxo/yeastar-...
If you open the documentation for it, this is what you need. It has 8 FXO ports for connecting external analog lines and the ability to create SIP accounts. Will you connect telephones or PBX via SIP - it does not matter to the gateway.
In general, it is cheaper to abandon analog lines and connect to a telephony provider via SIP. Perhaps, moreover, with the preservation of numbers