[asterisk-users] cascaded pickup

[Christophorus Laube]

Hi list,

I am struggeling with getting an out-of-office redirected call picked 
up. That is if one extension gets called and is not picked up in a 
certain time the call is redirected to the central phone by local 
channel. Both times when the Dial command is executed a pickup mark is 
set before:

exten => XXXXXXX,1,Set(PICKUPMARK=${EXTEN:6})
exten => XXXXXXX,2,Dial(SIP/${EXTEN}&Local/centralphone at E1,,tT)

exten => centralphone,1,Wait(15)
exten => centralphone,n,Set(PICKUPMARK=0)
exten => centralphone,n,Dial(SIP/XXXXXXY,,tT)

If someone from another extension tries to pickup the original extension 
it works. But if the centralphone starts ringing it is not possible to 
pickup the centralphone extension.
Can anyone of you imagine what my mistake is in that case?
Regards, Christophorus