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).
The same as the video call, only in this case the video voicemail allows recording voice messages with video. The telephone set must support this function for the best result.