Is it possible to connect sip + telephone line in one device?

Question

Telephony

Google did not help, so I ask for advice here on this issue:
Is there a phone device that can make both sip calls and calls on a regular telephone line? So that two cables can be connected to it - network and regular telephone? Judging by the proposals, this does not exist and is decided at the ATS level, but what if I didn’t search well?

Answer 1

Such, at least, existed
https://www.netxl.com/desktop-voip-phones/gigaset-...
https://www.poly.com/us/en/products/phones/soundst...
on ebay is
https://www.ebay.com/itm/Gigaset-DX800A-all-in-one...
avito
https://www.avito.ru/zvenigorod/telefony/telefon_s...
https://www .avito.ru/moskva/telefony/domashniy_tel...