Unfortunately those cherry switched keyboards have a Philips made controller in them, which makes them slightly incompatible with some software with a tightly timed keyboard routine.
You may never actually encounter such software, but worth noting anyway. :-)
They are not cherry switches, but they are mechanical switches that are soldered in place.
http://jope.fi/amiga/amikbd/a1kdetail.jpg
It's not an RJ11 phone jack, but a phone handset jack, with 4P4C modular connectors. http://en.wikipedia.org/wiki/Modular_connector#4P4C
From that picture, they look like they may be Alps switches.
If you are feeling adventurous, get an account at geekhack or deskauthority and read all the wikis on switch cleaning, maintenance, repair, etc.
