I troubleshot a network recently that had some very inconsistent network issues. At times during the day most user's network access was very bad. Ping times were very high with a lot of request time outs.
After ruling out servers and switches I had the cables tested. We found a couple data jacks with shorts in the cabling.
I have never seen a couple bad connections cause these kinds of problems for an entire network. The difference is all workstations have IP phones with POE injectors. Cable runs from the wall jack to the POE injector, POE injector to phone and phone to PC.
Could POE injector with bad cabling cause more problems than bad cabling without POE injectors?
I have no idea why they have a POE injector at each workstation, there are plenty of power outlets. Is there any reason someone would have recommended POE injectors instead of power supplies when there are plenty of power outlets?