IT administrators and system intrgators and installers can use Power Dsine's Power over Ethernet (PoE) Tester to find out if these jacks are hot. PoE Testers connected to an RJ-45 outlet check for the presence of electrical power. They also identify whether the power-sourcing equipment (PSE) is an endspan or PoE midspan device. And, the PoE Tester can detect operating electrical power originated by Cisco pre-803.3af standard in-line power switches. Available from PowerDsine's distributors, the PoE Tester costs $19.99.