This is a great fit for a 15-30 minute runtime for small (<60 user) phone systems supporting digital sets. I would recommend a larger capacity UPS if supporting IP sets running off of a co-located POE LAN switch due to the additional power draw.
We purchased 20 of these for our staff. 1 was buzzing from a malfunctioning transformer. Tripplite replaced it free of charge after a short troubleshooting session with their Tech support(American Tech). We have had one outage and they all performed flawlessly. Looking to purchase more in the future.
I lost a great computer to poor/dirty power because my previous UPS (by another popular brand) had quit working and I didn't know it. Now, with this product, that won't ever happen again. Better still, Tripplite's support has been OUTSTANDING! I'm not comfortable with electricity at all but they answered every question and gave support in terms I could understand and treated me very professionally. I am happy to recommend their products and service. Wish I could give 6 stars!
We use these for our servers and networking equipment -- reliable unit with excellent battery life! Bob in support sucks, though, so luckily the unit is reliable enough that we rarely need to call in.
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