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).
Dialog 4425 IP Vision is a professional IP-phone with additional features, including multi-line management function and built-in graphics display to meet all user needs. In addition, it can be used in small meeting rooms.