Is it possible to have a two cabinet Definity PBX (V8) configured for 4-digit UDP and make calls across 2 DS-1's in the same PBX? I have done this between two separate Lucent PBX's, and when I try it within the same one, I get a busy tone. This will work also if I use a prefix first. It seems strange why it would not work with UDP. Are there any ideas out there? Is this type of configuration possible?