[Freeswitch-users] Multiple Registrations - randomly only one device ring

Hi All, I enable the multiple registrations in sip_profiles/internal.xml. <param name="multiple-registrations" value="true"/> Then I restart the freeswitch. I use Aastra 9133i and eyebeam register for same extension. But randomly only one device ring. Do I need to enable any other settings? Thanks, Lloyd