OfficeIntercom is the useful and great tool you need for your business. It is easy to use and install and you can have it on all your office computers. It lets you use your PC to communicate to other PCs over Internet or over a LAN connection with its simple "push-to-talk" technology. It works as a virtual IP intercom, talk to any other OfficeIntercom user anywhere in the world. No cabling is required so besides being fast it's practical. It may feel like talking using a CB radio; you just press a key on your computer and listen on someone else's speakers. Download it from this site.