Operation Manual

DTX Series CableAnalyzer
Technical Reference Handbook
11-18
Table 11-2. Diagnosing Low-Level Network Problems (cont.)
• Mix of 568A and 568B wiring standards.
• Crossover cables used where not needed. They are typically used only between two switches or hubs.
• Tester is connected to a NIC (network interface card) with a straight-through cable. The reversed result is normal in this
situation, since a NIC transmits on pair 12 while a switch or hub transmits on 36.
Too many stations on the network.
Broadcast storms.
Wire pairs 12 and 36 are reversed
Note
The utilizati
on, collision, and error percentages given below are only
guidelines. Acceptable percentages can vary among networks.
Utilization averaging above 40 %
Utilization spikes above 40 %