Symptom:
Serial numbers from Prime Collaboration Assurance not available for other devices (H.323, MGCP, etc.)

Conditions:
Unable to query S/N's for devices, other than endpoints

From DeviceCentre -> Inventory page -> Export (CSV), one can filter column S/N to be included on CSV reports, but  per design this feature only works for endpoints.  There needs to be a way to be able to add S/N for infrastructure devices such as voice GW's.