Rj45 brings 8 connections which is nice but the connector is big and we only need 4 connections.
RJ11 4P4C brings 4 connections, when this is not woring out on a pcb look at RJ11 6P6C which brings 6 connectors.
https://www.ebay.de/itm/130-Stuck-pcs-RJ11-4P4C-fur-Leiterplatte-for-PCB-90/112668301836?hash=item1a3b8dda0c:g:SboAAOSwonBaIoHK
Rj45 brings 8 connections which is nice but the connector is big and we only need 4 connections.
RJ11 4P4C brings 4 connections, when this is not woring out on a pcb look at RJ11 6P6C which brings 6 connectors.
https://www.ebay.de/itm/130-Stuck-pcs-RJ11-4P4C-fur-Leiterplatte-for-PCB-90/112668301836?hash=item1a3b8dda0c:g:SboAAOSwonBaIoHK