Voice, Data & Fax Encryption System is a compact portable security system that ensures secure voice, data, fax, point-to-point file transfer, e-mail attachments and voice teleconferencing communication. This encryption system is connected to ordinary telephone lines to allow easy encryption of voice, fax and data communication. The main applications include law enforcement agencies, VIP offices and military offices. They feature secure voice, email virus control, secure automatic fax and secure voice teleconferencing.

Voicemail is a centralized system of managing telephone messages for a large group of people. Voicemail messages are stored on hard disk drives, media generally used by computers to store other forms of data. Messages are recorded in digitized natural human voice similar to how music is stored on a CD. To retrieve messages, a user calls the system from any phone, logs on using touch-tones, and his messages can be retrieved immediately. Voicemail systems are much more sophisticated than answering machines in that they can answer many phones at the same time, store incoming voice messages in personalized mailboxes associated with the user's phone number, send messages to one or more other user voice mailboxes, store voice messages for future delivery, transfer callers to another phone number for personal assistance and play different message greetings to different callers.

A VoIP phone is an internet telephony application in a personal computer. To call from a voip phone to a PSTN telephone the caller can encapsulate the called party's phone . The telephone number in a call initiation message is sent to a media gateway controller. The media gateway controller identifies the most appropriate internet gateway, perhaps the one closest to the called party so as to minimize telephone charges. It provides this gateway with the destination telephone number and the IP address and telephony application port number of the caller.