2 way radio

Hi all, New to the forum and I apologize if I've posted this in the wrong section. Was hoping you all could give me an idea of what I'll need and possibly a step by step guide to setting up a 2 way radio system with telephone interconnect for a small cab company on an island off the coast of...

I recently went down to the local radioshack and stumbled apon a 26-1300mhz glass mount antenna. I curently run 450mhz UHF 2 way radios, I was wondering if it is possible to use this antenna to tranmit as well as receive? this is much better than the specialized UHF disguise antennas for $250...