Ethernet
Ethernet 10/100Mbps Base-T, TCP/IP (NB-Mini only)
Ethernet 1000Mbps Base-T, TCP/IP (NB-i-Series can scale to 10 physical NICs)
Direct connection to third party router
Ethernet Connection to line terminator for xDSL connections. PPPoE client software for network connection
Serial
External modem may be connected via serial port. Both PAP and CHAP authentication protocols are supported.