User's Manual

7-84 Configuring, Installing, and Using Carrier Infrastructure
Figure 7.4 shows the location of the power connection on the bottom of the cabinet.
To connect power:
1 Perform one of the following:
• If you are using a power supply from or recommended by Nextnet Wireless, plug that
connector into the NextNet Wireless supplied power connector on the bottom of the
cabinet. The NextNet Wireless recommended power supply is part number 420-0160-
0048.
• If you are using a different power supply, connect it to the 50-amp power connector,
found on the bottom of the cabinet.
2 If desired, connect a battery backup power supply to the battery backup connector.
Powering tips
• It is recommended that you use a redundant power supply for base stations.
• Each base station requires 150 watts of power at 48 volts.
• The ground of the power can be either negative or positive. The 48 volt power input to the
base station is floating, so either the positive or negative can be grounded.
• Power input is polarity sensitive, so be sure you connect V+ and V- properly.
• 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.
Figure 7.4 Power connections on bottom of cabinet
50 Amp power connector
(optional, for customer-
provided power supply)
30 Amp battery backup
connector
NextNet Wireless
preferred power supply
connector
DO NOT
DISCONNECT.
Pre-wired power