I have a set of folks whose primary desk phones are h.323 and using dual registration on SIP. These folks are admins who have bridges of professionals and of eachother. I added their lines in the off-pbx-station mapping table as ec500. Seems like on internal calls the deskphones were receiving double calls and couldn't answer them. I changed ec500 to OPS and this seemed to have ceased. Is that the proper way to do this?