Nortel Tone Commander NT1U-220TC

The NT1U-220TC is an ISDN Network Termination suitable for standalone or rack configurations. Your ISDN telephones can be powered through the NT1.Power is provided by an in-line desktop power supply or by the rack. The Tone Commander NT1U-220TC converts an ANSI standard 2B1Q ISDN U-Interface from the telco central office to an S/T interface to connect to local customer terminal equipment.  Both point to point and multipoint ISDN terminal equipment configurations are supported.