We have a client that's inquiring why calls conferenced using CTIOS Desktop doesn't support Party Exit and Entrance tones. If a call was conferenced using the Cisco IP Phone, the tones work.
Conference party Entry and exit tones is suported by CTIOS.
I neeed some more information from your end to comment further on your issue.
Can you please share the following details:
What's your UCCE and CM version ?
Are you using SIP phones or SCCP phones ?