UPS Battery Backup for VoIP Network Closets

On Line Double Conversion UPS System 1.5kVA

This calculator will recommend UPS battery backup options for a network closet supporting Voice over IP (VoIP) phones and related equipment. In the event of a power outage, phones and equipment will remain up and running for the prescribed amount of time. In addition to VoIP, it can also be used to size battery backup for IP camera, wireless access points (WAP), access control devices and other powered IP devices.

Important Note: This calculator will help you estimate power requirements for a single network closet and not total power requirements for an entire facility. Use this calculator to get recommendations for each closet, then combine the results to arrive at a comprehensive VoIP battery backup plan.


Allowance for Future Growth (% of Total Load)

Minimum Runtime:

Note:  For runtimes over 2 hours (120 minutes), please contact a VoIP application specialist at or 888.447.6227 for assistance with UPS selection.

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