Black Box T1/E1 to Fiber Mux, Single-Mode Duplex SC, 30 kmDesigned to bridge traditional T1 E1 networks to modern fiber backbones, this Black Box T1 E1 to Fiber Mux delivers dependable, long haul performance for remote PBX equipment. By extending T1 E1 signals over single mode fiber up to 30 kilometers with a duplex SC fiber interface, it simplifies campus scale deployments and remote site connectivity while preserving timing and data integrity. The units built in diagnostic capabilitiesincluding local