Device for field verification of multi-device power over ethernet

A power testing device that tests power providing capabilities of a device under test, the power testing device comprising:

• a communication port including a plurality of pins, the communication port, in operation, receiving signals from the device under test via a cable that includes a plurality of wires electrically coupled to the pins of the communication port;
• first test circuitry electrically coupled to a first set of pairs of the pins of the communication port;
• second test circuitry electrically coupled to a second set of pairs of the pins of the communication port;
• a switch electrically coupled to at least one of the first test circuitry and the second test circuitry,
• wherein, while the switch is in a first state, the first test circuitry and the second test circuitry are electrically isolated from each other, and
• wherein, while the switch is in a second state, the first test circuitry and the second test circuitry are not electrically isolated from each other;
• a processor coupled to the first test circuitry, the second test circuitry, and the switch;
• and
• a memory coupled to the processor, the memory storing processor-readable instructions that, when executed by the processor, cause the processor to:
• control operation of the first test circuitry;
• control operation of the second test circuitry;
• and
• control the switch to be in one of the first state or the second state.