Older Motorola radios required a heavy Radio Interface Box (RIB). The DEP450 generation uses RIB-less cables.
If you selected Analog mode:
The DEP450 is a DMR (Digital Mobile Radio) Tier II radio. It can operate in both analog and digital modes. motorola dep450 programming software
Your software must support both protocols. Older "Maxtrac" or "GM300" software will not work. Older Motorola radios required a heavy Radio Interface