Hi Juan Carlos,Thanks for your question.Usually in this setup MTP is not needed, as both inbound and outbound call should work without MTP in mose cases. However MTP might be used and needed in some cases, for example, if we need CUCM to do Early Off...

Hi Chrys,Also I find you have outbound proxy configured under voice service sip, however I don't think proxy is needed for CUBE to communicate with CUCM. Please modify dial-peer 889 as below:dial-peer voice 889 voip   no voice-class sip outbound-prox...

Hi Aokanlawon,Thanks for your question.I assume you mean the MTP in CUCM SIP trunk configuration and the INVITE was sent from CUCM to CUBE. In UCCX/UCCE environment, when the call is being on hold or transferred to agent/IVR, UCCX/CUCM will send RE-I...

Aokanlawon, thank you for helping answer the questions.As you have pointed out, there is no response from CUCM for SIP INVITE due to connectivity isuse.Chrys, to further check this, firstly check if CUBE can ping CUCM or not, then check if it can pin...

Hi Fei,Thanks for providing the debug logs.In the failed calls, it's seen once one of the extensions (8607,8615,8617 or 9600) answers the phone, CME just releases the call. If look into the logs, the ccapi level triggers the disconnect. It seems CME ...