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).
Mini Asterisk GUI
A handy Web GUI with supportive documentation and quick learning cycle is called Mini Asterisk. Existing analog jacks and IP phones are defined automatically, and no procedures of Asterisk configuration are required.