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).
VoIP Gateway Cisco SPA8000 – is a perfect solution as for communication operators as well as for VoIP telephony providers and any business using VoIP telephony with SIP protocol. Despite the fact the SPA8000 has 8 configurable SIP lines, in reality this device can support up to 16 active calls and possibility of a 3way conference. And pre-installed, by Cisco, services allow you to broaden and improve the possibilities of you regular analog phones and other communication tools, such as cordless phones or fax machines.