Callback on Unsuccessful Transfer

[Futureweb]

Hi,
is there anything special that I need to configure on Yealink Phones (T48G) to get this working?

Right now my Yealink Transfer Settings are:
- transfer.semi_attend_tran_enable = 0
- transfer.blind_tran_on_hook_enable = 1
- transfer.on_hook_trans_enable = 1
- transfer.dsskey_deal_type = 1
- transfer.multi_call_trans_enable = 1
- transfer.tran_others_after_conf_enable = 0

On 3CX the Feature is configured with Function-Code *7* and 20 Seconds.
Redirect Rules for those Extensions are set to 30 Seconds.

It's working when I do an internal Call - it's coming back after 20 Seconds.
But if I transfer an external call it will always do what the Redirect Rules say (after 30 Seconds) - and never bounce back to the extension that initiated the transfer?

Hope someone can help me on this?
Andreas Schnederle-Wagner

 

[Futureweb]

Anyone?
This Project should be finished by tomorrow and this Problem is driving me nuts! :-(

Andreas