UCCX Call consult transfer to an external number

Version 1
    This document was generated from CDN thread

    Created by: Albert Heung on 28-04-2010 01:21:25 AM
    We are implementing a call back function and we require to use the call consult transfer to an external number (customer's phone number). However, when the system tries to call the customer's number, I could hear the system ringing, but their physical phone does not ring. Has anyone done a call consult transfer (supervised transfer) to an external number before?
    The version of UCCX is 7.01 and the CM version is
    Thanks for your assitance.