Connecting a UPS to an AC-Powered Voice Gateway
Before you install a UPS, make sure that you read the installation instructions.
Note
The following figure shows a setup using a UPS.
Figure 8: Connecting a UPS to an AC-Powered Chassis
AC wall plug3AC plug1
UPS2
Connecting the Chassis to a +12V DC Power Supply
If you are powering the chassis using a +12V DC power supply, ensure that you have not connected the chassis
to an AC power source. Do not use AC and DC power at the same time. If you do, the unit stops operating,
and you must reboot it with only a single power source.
Caution
Power to a DC-powered chassis is provided by a 12 Volt battery.
Follow these guidelines before you install a battery:
• Review the documents accompanying the battery before setting up your system.
• When you make the settings for the DC source voltage, you must consider the voltage drops between
the DC power supply and the DC input connector on Cisco VG310 or Cisco VG320. To ensure optimal
performance, the input voltage at the DC input connector should not be less than 11.5 V.
• Use a battery of higher capacity if you require longer periods of battery operation (for example, up to 8
hours).
• If you use a battery of high capacity or a high-capacity DC source to power the chassis, install an external
fuse for protection against fault and fire.
Power Connector for the DC Power Supply
The Cisco VG310 and Cisco VG320 analog voice gateways support the Molex Mini-Fit Jr. 5557 Series,
8-circuit dual-row, +12V DC power connector (Molex P/N 39-01-2085). The +12V DC power input is designed
Installing the Cisco VG310 and Cisco VG320 Voice Gateways
15
Installing the Cisco VG310 and Cisco VG320 Voice Gateways
Connecting a UPS to an AC-Powered Voice Gateway
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