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).
Appears on the computer screen by the arrival of the call or fax. By the arrival of a call “Call Controller” not only identifies the caller but also gives you a list of variants: to accept the call, reject it, send a voicemail or send an answer as a text message which will be instantly converted into speech and will sound to the caller.