User Manual

3-27
Powering base stations
This section describes tips for powering base stations, as well as the component
connection sequence you need to use to properly power base stations.
Powering tips
• It is recommended that you use a redundant power supply for base stations.
• Each base station requires 48 volts DC at 3.0 amps maximum
• Depending on the type of equipment you own, supply power to the Ethernet
switch and backbone network equipment.
• It is recommended that you use an uninterruptable power supply (UPS).
Tips for sizing the UPS include:
• Size the voltage and amperage of the power supply according to the number
of base stations at your cell site.
• Size the UPS according to the efficiency of the DC power supplies and
power requirements of the other ancillary equipment, such as the Ethernet
switch and backbone network equipment.
• Consider the time you want to allow the system to operate on the UPS.
Powering the base station
The base station does not have a power switch. Rather, it receives its power when
the UPS, power supply, and TVS module are connected to the base station
through the Ethernet/power cable.
To connect the base station to a power supply, connect these components in the
order that follows:
1 Connect the base station to the antenna.
2 Connect the GPS to a base station, and use a daisy chain wiring scheme to
connect the other base stations.
3 Connect the base station to the TVS module using the Ethernet/power cable of
the desired length.
4 Use an Ethernet cable to connect the TVS module to the network. Use a
standard DC power cable to connect the TVS module to the power supply.
5 Connect the power supply to the UPS.
6 Connect the UPS to an AC power supply.