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).
Integration of real time products, such as chat, telephony (including IP telephony), video conferences, call control and speech recognition, together with “un-real” time products such as voice mail, SMS messages and Fax. “Unified Communications” is not a standalone product, but a set of products, which present a constant user’s interface among many devices and media types.