I have been very happy with my Net Prowler from Platinum; doesn't do the IP camera part

[Link: platinumtools.com]

I'd guess you are looking for a broken pair and/or voltage drop

• Displays length measurement for each pair in feet or meters using TDR technology

• Detects PoE per IEEE 802.3af/at with load test for voltage drop and which pairs the PoE is located on (class)