Verilink's Industry Standard T1 ESF CSU provides T1 access in a compact, cost-effective device. This CSU offers simple configuration, test capability, and full-featured performance by providing signal regeneration, line conditioning, and surge protection for T1 circuits all in one small package. This CSU will automatically adapt line coding as needed to accommodate legacy networks, allowing network administrators to use existing PBX equipment. T1 ESF CSU ,Plug-N-Play design, Lowest Power consumption, Compact Designs, Wall-mount form factor, Automatic Transcoding/Transframing and automatic line build-out.