Call transfer does not return to original station if no answer

[BombasticSquirrel81]

How to redirect 'failed transfers' where transferred to ext doesn't answer back to orginal operator to let the caller know person is busy. Currently the caller can be retrieved during transfer but if the call rerouting timer elapses they are sent to voicemail.

I can see options for 'Allow Recall after Transfer' and 'No Answer Recall Timer' in the class of service form. From reading the description it appears to be the correct setting to allow this, however it doesn't make a difference. Does anyone know why?

Allow recall after transfer: Yes
No Answer Recall Timer: 17
Call Rerouting Timer: 18

Thanks

[Floppy1]

Check the destination DN's 1st alt routing and the COS option call forward no answer timer. The first alt routing may be set to voicemail or the user has set call  forward no answer to VM ?

The call forward no answer timer dictates how long before forwarding and is probably lower than the no answer recall timer