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).
Works on defining new network architecture are carried out by such
organizations as ITU-T, Multiservice Switching Forum, and International
Packet Communications Consortium.