[asterisk-users] pickup application failed

[Rilawich Ango]

I have a TDM400 in the server.  I want to press **1XX to pickup a
call.  It is ok if I pickup a call dialled from 1XX to 1YY (internal
network call).  However, it is failed to pick up a call from PSTN
thro' TDM400 card.  It seems I can't guess the correct context of it.
How can I know the context of  the call using CLI?  The default
context of the TDM400 is from-pstn but pickup still failed if I add
exten => _**1XX,n,Pickup(${EXTEN:2}@from-pstn) in the end of context
BLF_group_pickup.

[BLF_group_pickup]
exten => _**1XX,1,Pickup(${EXTEN:2}@internal)
exten => _**1XX,n,Pickup(${EXTEN:2}@internal-admin)