There is no mention of Cisco only support in the admin guide. It does mention that it will work for any SNMP capable switch. I am assuming this means any MIB2 compliant SNMP switch.
If you had a desktop switch plugged into a managed switchport, you should see multiple mac addresses on that managed switchport.
Hope this helps.
UDT is definitely NOT Cisco centric. We are moving away from Cisco to Juniper switches (EX3300, EX4200, and EX4500's currently deployed) and UDT works GREAT!!
I'm pretty sure that UDT will work with AVAYA switches as well.