Hi
The 300 series switches can be configured via;
- a Graphical User interface (GUI) by using Internet explorer or other browser.
- Command line via a console cable or telnet/SSH session
- Some really smart folks are using SNMP to configure the switch, but
You need to look at the user guides and manuals which leads you through initial setup and configuration of the switch.
setup guide
http://www.cisco.com/en/US/docs/switches/lan/csbms/sf30x_sg30x/quick_start/78-19252-01.pdf
Maintenance guide
http://www.cisco.com/en/US/products/ps10898/prod_maintenance_guides_list.html
If you are still having trouble and you are not a Cisco Partner, then it is advisable to check the following URL and find a cisco partner;
http://tools.cisco.com/WWChannels/LOCATR/openBasicSearch.do
regards Dave
