i learned the hard way that cisco phones can be very different.. the cisco 8821 wireless ip phone in particular seems to be locked to call manager because cisco does not provide multi-platform firmware for the 8821 like they do for the other phones in the 8800 series.
so i've got a cisco call manager (red hat linux) virtual machine running now just for the purpose of working with the closed platform cisco phones. and i would like to connect cisco call manager via a sip trunk to the obi212 gateway. so i can make outbound calls via PSTN and GV.
i know this is not a cisco support forum, but i would appreciate any advice on connecting obi212 to cisco call manager (CUCM). i've seen examples of obi110 working with asterisk/raspbx servers so i'm thinking it must be possible.