GNB offers a comprehensive range of valve-regulated lead acid (VRLA) and flooded batteries to serve the telecommunications market. These battery ranges are designed for remarkable performance, long life, high energy density and ease of installation, which makes them applicable for all types of telecom applications.
Historically, the communications industry equipment has been using -48V DC power supply. -48V is also known as positive ground. Because the smallest communications network and communications engineering are in the telephone network, the telecom bureau power supply voltage are 48V.
Communication base station power supply in the tower room power supply system is an essential and important part of the mobile communication network. The current communication power supply voltage level is divided into DC-48V (+24V), AC 220/380V. Communication industry equipment generally use -48V DC power supply, positive grounding, why?
Communication base stations use -48V power supply for most historical reasons. Historically, the communications industry equipment has been using -48V DC power supply. -48V is also known as positive ground.
Because the smallest communications network and communications engineering are in the telephone network, the telecom bureau power supply voltage are 48V. Later, to be compatible with earlier equipment and reduce the cost of replacement, engineering and port communications equipment use -48V power supply.
Early wired telephone use "common power". The power supply of the telephone is through the telephone line by the telephone exchange. The telephone line plays a role in power supply, transmission of voice, bell stream, pick up and hang-up signal. The power supply used in the early telephone bureau is the original lead-acid battery.