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).
IP Devices
are the devices supporting Internet protocol, some of the devices a capable of
wireless, Wi-FI, broadband, edge and 3G connections. All the devices have their
own IP address.