Historical
T1.315-2001
Voltage Levels for DC-Powered Equipment Used in the Telecommunications Environment (Revision of T1.315-1994)
This standard establishes requirements and objectives for voltage ranges and associated characteristics (transient and noise) of the input voltage for equipment powered from dc power systems in the telecommunications environment. This standard does not specify dc power plant voltage levels. Also, this standard does not specify the voltage applied to the interface between the network and customer installations (network interface).
Alliance For Telecommunications Industry Solutions [atis]