Hello All ,
We upgraded lately our Cisco CCM from Version 3.3(4) to 4.2(3). After the upgrade we noticed the following :
1 - An Incoming Call reaches Operator Cisco IP Phone.
2 - The Caller requests to be transfered to another Extension.
3 - The Operator perform a Blind Transfer ( Transfer + Ext. No. + Transfer ).
4 - The Call rings normally on the transfered Extesnion but the Caller hears Nothing untill the other side Pick the Phone and then he/she begings to hear the other side normally ( No Ring Back ).
Same Scenario occurs within the Conference Call.
Note : We tried the Transfer and Conference between the Internal Extensions and everything seems to be working normally.
Any Ideas ?