3 ms·
For telco gear - at least the local distribution stuff in a box on the side of a road - a common setup is AC for normal operation, but 24VDC (or is it 48VDC?) b
by wongarsu 3y ago
For telco gear - at least the local distribution stuff in a box on the side of a road - a common setup is AC for normal operation, but 24VDC (or is it 48VDC?) between UPS and device. Because of the telco heritage those devices come with both AC and DC power inputs, and using both protects against power supply failures and allows the UPS to last a bit longer.