The snom 820 was a decisive step towards combining state-of-the-art technology. It was the beginning of a superior line of business VoIP phones. Its extraordinary elegance and performance combined both: latest technology and well-known snom features.Moreover, the snom 821 offers all conveniences snom customers have come to expect. As security is one of the most important concerns of your time, this topic has always been a priority for snom. Therefore important security features like secure VPN, TLS and SRTP are an integral part of the 821's firmware. But the snom 821 also offers a wide range of functions that are a necessity these days and highly valued particularly by business customers. 5-way conferencing, multiple ringtones, and up to twelve different SIP identities are a few examples for the numerous business functionalities provided. The snom 821 allows customers to operate completely indepently of their current environment - anytime, anyplace.The phone user interface is designed to be operated intuitively. The keys are positioned so as to be easily seen and used from any angle, regardless of whether the snom 821 is set up with the footstand in the high or low position.