Tone Commander NT1U-220TC ISDN Network Termination Standalone Adapter

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.

The NT1U-220TC complies with ANSI T1.601-1992 and T1.605-1991 interface standards, including SC1 and SC2 subchannels, and is compatible with National-1 and National-2 ISDN standards. In addition, it may be used as a drop-in replacement for the AT&T NT1U-220.

• 2–S/T ports
• 4 status lights
• 50/100 ohm
• 1.4 watts reset button