[Asterisk-Users] Limit the call & recording when pressing *1

[Joseph]

I'm testing two options from dial command and can not make them to work.

L(x[:y][:z]): Limit the call to 'x' ms, warning when 'y' ms are left,
repeated every 'z' ms) Only 'x' is required, 'y' and 'z' are optional.
The following special variables are optional for limit calls: (pasted
from app_dial.c) 

w: Allow the called user to start recording after pressing *1 or what
defined in features.conf (Asterisk > v1.0.x)

for example I've tired:
exten => 21,1,Dial(${phone1},20,r,w)
exten => 21,1,Dial(${phone1},20,r,L(5[:4][:1]))

but none is working.

I've *-1.0.5 but I can not find app_dial.c nor features.conf contains
any define recording options.

-- 
#Joseph