The PS-50 is a rack- or wall-mountable bulk power supply for powering ISDN telephones and NT1 Network Terminations.

Fifty -48 VDC output connections are provided. Each output has self-resetting current limiting protection at 250 mA. The total available output current is 2.8 A, which is suitable to power up to 50 Tone Commander ISDN telephones.

Optional NT1-200 Battery Backup Power Supply and NT1-200 Add-on Battery units can be added to the PS-50 to enable uninterrupted ISDN power during a power failure.

Input:    120 VAC, 60 Hz, 2 A max.

Output: -48 VDC, current limited at 250 mA per output pair, 2.8 A total (50 pairs)

UL Listed.