A European format for digital transmission. E1 supports signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps).
Digium Wildcard TDM410 is a half-length PCI 2.2 compatible card that supports FXS and FXO interfaces for connecting analog telephones and lines through a PC, it was developed as a replacement for TDM400P. By using IP-PBX Asterisk Open Source software and a standard PC, the user of Digium Wildcard TDM410 could build a small office telephone system, which will have all of the sophisticated and useful features of modern telecommunications equipment for big business.