Use Abort Transfer to stop the transfer operation whenever a user presses a non-idle call appearance button in the middle of the transfer operation, or when the user hangs up. If both the Abort Transfer and Transfer Upon Hang-Up fields are set to y and you press the transfer button, and then dial the complete transfer-to number, hanging up the telephone transfers the call. You must select another non-idle call appearance to abort the transfer. If the Transfer Upon Hang-Up field is y, hanging up completes the transfer. Requires DCP, Hybrid, IP, ISDN-BRI or wireless telephones