The DS3-T3/E3 Coax to Fiber Network Interface Device (NID) provides a solution for those users that need to extend DS3 connections over fiber. It supports Small Form Pluggable (SFP) transceivers to support a variety of fiber types, distances and wavelengths to provide maximum flexibility across a variety of network topologies. The use of Coarse Wave Division Multiplexing (CWDM) SFPs can be utilized to further increase the bandwidth capacity of the fiber infrastructure.