Please take note of the COP file above, as in the case of the ringtone raw and rwb files, without the COP file, they will need to be deleted each time the ringer is changed and changed back since these file will be regenerated thus, causing the issue again. I hve a client claiming that when she receieved an incoming call , her phone does not ring only flash .she has no problem receiving and making calls but just no ringing tone for incoming call . she resolved it by resetting the phone. Does anyone hve the same issue before ? Thanks in advance Hi. Would somebody can recommend how to use a Custom ringtone on a single phone in CUCM 11.5. I know that Cisco IP phone designer doesn't exist anymore so what alternatives do I have? Any suggestions? thanks SPA Ringtone Utility. Convert and load your ringtone from a wav (PCM G711) file into the phone.