Reorder Tone after accepting or making a call

[HelpingKid]

We are having issue with some NOT all incoming and outgoing calls. When a user place a call they will get reorder tone. When they make 2nd or 3rd attempt the call goes thru. Also when a call is transfer from UCCX to an agent sometimes when an agent answer the call they get reorder tone. Any thought or recommendation ?

Call flow

ISP  --> SIP trunk --> Cisco 2911 -- SIP trunk --CUCM 11.5

[Jonas Fraga]

Hello,

Can you provide some SIP captures from all places of the call? CUCM logs will be great tho because on that info we can see the disconnect cause code which will be a good start to understand the reorder tone cause.