I have a spare analogue line from UPC which I wish to use in a basement part of our building that a normal cordless signal is too weak to reach with any reliability. I cannot run further cables but there is a network connection at both the phone port and where the analogue handset would be.
Is there some sort of PSTN-VOIP adapter for one end and VOIP-PSTN adapter for the other end?
There may well be a term for such a device but most sites seem to offer products that route through a commercial sip service like Blueface. The 01 PSTN (UPC hybrid) line is already in place.