Cisco call manager - Discovery and mapping | Class ?

[KJ18]

In our environment, there are two Cisco Call manager Appliances. These appliances are hardened so normal UNIX commands (like ls, uname etc.) do not work on them. I have painstakingly created a classifier and a horizontal discovery pattern utilizing SNMP OIDs to finally discover both the UCCX Appliances (hardware boxes) and classified them under the "Network Appliance Hardware" Class. 

Now I noticed an 'application' type pattern by the name of "Cisco CallManager". Tested it in debug mode using ssh credentials and the pattern seems to (want to) create connections! Only challenge is that since my horizontal pattern is classifying the hardware under "Network Appliance Hardware" class, the "Cisco CallManager" is not getting triggered.

Questions:

1. How have you planned on discovering the Cisco call manager Hardware and what class is it supposed to classify as? UNIX ?
2. How best can I discover the hardware boxes, classify them appropriately, and Map them using the OOTB "Cisco CallManager" pattern. I have a few ideas, but would like the community's opinions.

[Nic Nagtzaam]

Any chance you could share the OID's you used to pull the serial number? I havent been able to locate the appropriate OID to get this from the appliances. 

[Keith Grindley]

Would you be able to share an overview of the steps you took to accomplish this? We're running into the same issue and would love some tips on how to accomplish the custom pattern that can successfully discover these virtual appliances.