We recently added E911 and now have a need to provide somewhat specific location information per floor and building. We have assigned a DID per floor quadrant and adjunct building. We now need to transmit the selected "911" DID to the PSAP for identification purposes when a 911 call is placed. I can't use public-numbering because I don't want to mask the real DID's on non-emergency calls. These are digital, analog and IP phone sets. The adjunct buildings are all using the same PRI located at the main location. Any help would be appreciated.