Call pick up is not working in pstn phones

Asterisk Asterisk Support
1

Call pickup is allows to answer an incoming call from another phone.

For Eg: I have three PSTN phones .If i made a call from one pstn to another pstn i can able to pick up the call from the third pstn phone by pressing *9(extension of second pstn) .But here what’s the problem is once i press *9 it is automatically goin to voice mail.can any one please tell me any solution for this problem.

2

Not without details of your dialplan. If you didn’t write the dialplan, you should contact the person or organisation that did.

3

i have fallowing dial plans:
exten => _*9.,1,SET(GLOBAL(PICKUPMARK)=${EXTEN:2})
exten => _*9.,n,Pickup(${EXTEN:2}@PICKUPMARK)