OfficeIntercom lets you use your computer to speak to others over the internet or your local office computer network. It works as a virtual intercom and feels a little like using a CB radio. To talk to anyone else who has installed OfficeIntercom anywhere in the world, just hold down a key on the keyboard. Speak into your computer's microphone and you will be heard through the other computer's speakers. You can assign system-wide 'hot' keys, or use hardwired buttons or a SpeechMike handset to connect directly without opening OfficeIntercom. For security or privacy, OfficeIntercom can also encrypt the voice with private key strong encryption. Features:~Assign system wide hot keys to connect directly without opening the application. ~Encrypt your voice with private key strong encryption. ~Use your network or a VoIP SIP service provider. ~Can be used with a headset, a microphone and speakers , or the Express USB phone device. ~Can be configured to work behind NATs and Firewalls using UPnP or STUN methods. ~Supports echo cancellation and noise reduction when using a microphone and speakers. ~Store and access thousands of contact phone numbers in the Office Intercom Address Book or using the Windows Address Book or Contacts. ~"Do Not Disturb" option stops others from taling to you when you are busy with other matters. ~Set bandwidth usage and audio quality. ~Ability to allow only certain callers to contact you.