I've got several RJ11 to UK (socket) adapters for connecting phones to
an ATA's FXS port.

Can someone please advise if they are the correct cable type (with the
addition of a gender changer M-M cable) for connection of the FXO port
of a SPA-3102 to my regular PSTN phone line.

Just don't want to fry anything or maybe find the capacitor in the
RJ11 lead isn't needed.

If it's _not_ the right cable type, then what is? I have a few RJ11-
UK (plug) leads from old modems (e.g. as delivered with laptops) but
they aren't all the same. There are at least two variants I've come
across.

TIA