Well the first is just a rack, with a couple of patch panels (Wires can probably be removed)
The Panasonic box will be a PBX (Telephone exchange) of some kind, you can use special phones with extension buttons etc, but normal phones normally works as well by using key presses, should be able to get a manual online. I have a much older one of these - 8 extension.
The thing with the phone socket attached and antenna, looks like it might be a wireless box to connect a phone.. if they didnt want to run a cable?
The last one looks like a telecoms junction box, open it up I expect it is only connecting cables and doesnt actually do anything??
For value check ebay
![Wink ;)](http://www.tekforums.net/Smileys/teksmileys/wink.gif)
edit: musst have posted while I was writing!