Cisco 8 port Multi-flex Trunk Voice/Clear-channel Data T1/E1 Module - For Voice, Wide Area Network - 8 x T1/E1 NetworkEthernet - T1/E1

With T1/E1 technology, enjoy up to 2.048Mbps (E-carrier) or 1.544Mbps (T-carrier) data transfer rate over service provider link With Ethernet connections, connect your networking devices with the speed of up to 10Mbps