The Cisco 1548U-DS Micro Switch is now obsolete (past End-of-Life and End-of-Support status).
End-of-Sale Date: 2002-11-29
End-of-Support Date: 2007-11-30
Cisco's End-of-Life Policy
You can view a listing of available Campus LAN Switches - Access offerings that best meet your specific needs
If you want support information for the Cisco 1548U-DS Micro Switch documentation, it may be available through Cisco.com Search or in the Cisco Community