Thanks for the responses. The DK424 has a PRI and 2 POTS lines (for backup). The asterisk system has SIP trunks. The two systems are not connected together.

I was hoping I was missing a simple solution, but it is starting to look like it isn't doable with the Dk424. I guess worst case we will just have to cut over to the Asterisk system completely. I am just hesistant to because we are using a custom developed soft phone with it and it integrates heavily with our database. I was really hoping to do a larger scale test with several of our users prior to a full roll out.

Thanks