I have LMS3.1
I cannot see the Cisco Ip-phone as "Ip phone". They are marked as "end Host"
Allthough, the CCM (pubisher) can be joined with SNMP. The Snmp walk tools on this CCM give an answer on OID :188.8.131.52.184.108.40.206.1.2.1
Note that the CCM in topology are green (with a "?" inside the box)
The CCM version is 5.1.3