It sucks when your Wi-Fi goes down. Sometimes you can’t load YouTube, sometimes you can’t post on Facebook, sometimes you can’t look up that patient’s file to make sure they’re not allergic to the drug you’re about to pump in them.

Wait, what?

Yes, hospitals use Wi-Fi too, and they can’t afford to have their systems go down.

7Signal received $4 million in its second round of funding to make sure that doesn’t happen. The company focuses specifically on monitoring and troubleshooting Wi-Fi for hospitals to make sure their networks stay up and working right. It is based in Cleveland, Ohio and plans to use the funding to deploy its product throughout the United States and some select international markets.

The round was led by Allos Ventures and Mutual Capital Partners Funds with participation from existing investor North Coast Angel Fund.