Internet telephony VoIP embodies requirements such as those that would be difficult and expensive to implement using analog public telephone networks.

For example, it is possible to transmit more than one telephone call within a telephone speed connection. Therefore, we say that SIP VoIP telephony is the easiest way to add additional telephone lines to your office or home. You can also easily connect such advantages as:

- Auto redial

- Call forwarding

- Conference Connection

- Smart answering machine

- Voice menu

Standardized protocol means security and safe calls. VoIP telephony cisco seamlessly solves all the difficulties encountered in connecting telephone connections via traditional, analogue telephone lines and the like. All that is needed for IP telephony is to provide signal encryption, and then - the subsequent decryption of the transmitted data stream.