The timeout value in seconds to return the caller to its originator in case of an unsuccessful blind transfer.
|Enable Transfer Callback||Check if the transfer fails on no answer time-out. The call is returned to the transferrer|
|Configure Transfer Callback|
|Waiting time until transfer callback (seconds)||The waiting time the caller waits before he returns to the transferrer|
|Prefix||Send the caller a CID prefix due the Transfer Callback condition.|