Digium's TE820 octal-span digital card is built exclusively for high-density asterisk applications that require high performance, cost effective digital connectivity. The TE820 seamlessly interconnects traditional telephony systems with Voice over IP (VoIP) technologies at the low per-port price on the market today. The TE820 card supports industry standard telephony protocols, including multiple variants of primary rate ISDN. Each span can be configured as either CPE or network for optimal flexibility.