Set it up as Trunked Motorola Type II and default bandplan and NFM and a Wildcard as TG and see if that works.
It could use a custom bandplan and then you have to do a search, probably between 860MHz-870MHz, and try and find the voice channels when they are active and enter all those in the Site frequency list. Voice channels will have a low rumbling subtone, the low speed control data, while in use and at the end comes 1 sec of a little higher frequency subtone that is the end tone. You probably need to use an external speaker to hear low frequency tones, like computer speakers.
/Ubbe