Sir,
We are using huge number of Cisco VoIP phones with Part number PID VID: CP-7821-k9=
Recently we received the same VoIP phones with different part number PID VID: CP-7821-k9++=
Please clarify the below points for our reference please
Is there any difference between two part numbers.
What is the meaning for second Part number CP-7821-k9++=
Thanks and Regards