Enable R hook flash on Gigaset

some links to begin:
http://lists.digium.com/pipermail/asterisk-users/2008-October/219613.html


elastix-alix*CLI> features show
Builtin Feature Default Current
--------------- ------- -------
Pickup *8 *8
Blind Transfer # ##
Attended Transfer *2
One Touch Monitor *1
Disconnect Call * **
Park Call
One Touch MixMonitor

CLI> features reload

elastix-alix*CLI> features show
Builtin Feature Default Current
--------------- ------- -------
Pickup *8 *8
Blind Transfer # ##
Attended Transfer A
One Touch Monitor *1
Disconnect Call * **