I have used several of these for IP desk phones at a local small business. The company that installed the phones decided to use a power bank with each phone and wanted to charge the small business a monthly fee for using them. I mentioned that the cost of a basic POE injector will offset that cost for a little over a year, so a small company made me order them. They work flawlessly on each of the phones and the small business is happy. victory, victory!
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