asterisk users - Dec 2007 - Doorbell Siedle DCA 612 and Asterisk?

Hi,

has anyone already set up a configuration between the doorbell Siedle 
DCA 612 and an Asterisk Server?

I have used a Grandstream HT 286 to connect the doorbell and the 
asterisk. When I press the button, the phone ring and when I pick up the 
call I hear a beeping. At the door I hear nothing.

According to the wiki, this doorbell should work with Asterisk, but I 
haven't found a dialplan or a howto on how the configuration should look 
like.

Stefan
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