Phone Connection provides installation, maintenance, and support of telephone systems for all types of businesses. We also offer many types of accessories for your phone system, such as headphones, cordless head and handsets, call boxes, on hold music, on hold messaging, paging, etc. Phone Connection provides computer-networking services and can handle all types of cabling such as Cat 5e and Cat 6 for networks, servers, and computer rooms. Visit Other AV Businesses. Coldwell Banker Bozigian Realty.