Here you see a picture of the one of Simon In Suffolk’s recommended…
• Cisco WS-C2960-8TC-L’s SMPS.
We have discovered that some who bought their Cisco 2960 on ebay,.and that these Cisco’s have not gone through any control-programs…have had inferior soundquality.
Then it has been shown that the fault has been in the power-supply…See picture above.
These SMPS can be purchased new or used from some companies that specialize in Cisco,or used Cisco.
The option is,.that a knowledgeable company makes a recapp on your SMPS.
It is often on Cisco 2960 from 2007-2008 that this has occurred to us,.later manufactured has not yet had this problem.
@obsydian,…Only for you below .
Important: These images are for those of you who are interested in how a Cisco looks internally.
If you have no knowledge,.Do Not Open Your Cisco.
• For those of you with knowledge,.there is a cable (see picture) between your SMPS and your Audioboard.
Pull it up and down 8-10 times to remove oxides from the contact-surfaces.