You can use ISDN (I.420) or xDSL connection to the Telephone Exchange. ISDN had traction many years ago. However, DSL technology is now used with the last mile, i.e. the local copper loop. At your premise you will need a DSL termination unit for connecting your device.
The Analog Copper line from your operator will at best support Loop-Disconnect or
Multifrequency 4 – MF4 – signalling. This was excellent for pure Telephony calls
For Digital you will need ISDN (2B+D), xDSL/ADSL (DSL-AM), etc..