asterisk users - Jan 2005 - Can I start recording during call - is priority "a" active only in voicemail ?

Hi,

I'd like to trigger call recording during call. Do I have any keys that can
be pressed during call ?

I've tried this, but doesn't start anything ( I guess that "a"
is active
only during voicemail ?):

exten => a,1,DBget(temp=Record/${TIMESTAMP}_${UNIQUEID}_${CALLERID}) ;
Already recording ? if not goto 102
exten =>
a,102,DBput(Record/${TIMESTAMP}_${UNIQUEID}_${CALLERID}='yes')
exten => a,103,Monitor(wav49,${TIMESTAMP}_${UNIQUEID}_${CALLERID},m)

Is it possible to achieve this ?   Any similar solutions ?

Regards,

Rob.