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 computers microphone and you will be heard through the other computers 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.A professional edition is available from NCH Software.About NCH Software:NCH Software offers more than 80 easy-to-use audio video business and telephonyVoIP software solutions that improve productivity and usability for small businesses and consumers. Focused on specific needs they produce software with all the bells and whistles of typical brands but without the complexity. NCH Software provides users with what they need at a price they can afford.