The 1-Port Gigabit Ethernet SFP Module plugs into ADTRAN Gigabit Ethernet modules designed to accept Small Form-factor pluggables (SFPs). Installed into an appropriate host module, the 1-Port Gigabit Ethernet SFP Module provides 1000 Mbps full duplex data-links with 5-level Pulse Amplitude Modulation (PAM) signal over unshielded twisted-pair Cat 5 cable.