Cisco Systems 520 Manual De Usuario

Here are some basic troubleshooting for problems related to connections to the 
switch.

To resolve problems related to connectivity between the switch and other devices, 
again follow the procedures in 

 and 

 Follow the steps carefully, and review the 

troubleshooting tips included in the steps. Make sure that you review the warnings 
and guidelines provided in these chapters. Additional guidelines that you should 
review are in 

If connected IP phones continually disconnect, make sure that you are using an 
undamaged Category 5 straight-through cable, not a crossover cable, to connect 
each IP phone to the switch. 

If the problem persists, upgrade the switch through the Cisco Configuration 
Assistant.