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).
Greeting - the caller will hear a greeting during the call. The function can be met, when calling to different companies, in most cases after the greeting follows a request, to which department or person the call has to be directed to.