Hello Dell Support,

I recently upgraded my 3048EP switch from version 6.6.3.40 to 6.7.1.52. While other resources are functioning correctly, my Cisco VoIP is not working after the upgrade. Is there a compatibility issue with the new firmware? When I revert to the older firmware, the VoIP system seems to work fine.

Any guidance or assistance you can provide would be greatly appreciated.

ALL configurations are same and havenot been modified

Thank you,