Digium phones and FreePBX 13

What is the best way to configure/connect Digium phones to the new v13 distro? I hav had the older v12 for a long time and it worked fine. I added the DPMA module to this new version and the phone “sees” the Asterisk server. But when you select it, the phone sits for a long time and then say sit can not get it’s config from the server. The CLI shows an error like can’d find a config for 192.168… which is not the extension number.