Anyone ever did this? I need to interface an old Telident 911 STS system with CUCM 7.1 for 911 from multiple buildings. I know it should work as it is looking for ANI but what would the physical interface be? FXS? CAMA trunks? Right now it is interfaced with an old Fujitsu PBX (which we are removing) using a DB-9 connector into the back of the STS device. I need to crack open the Fujistsu to see how it is connected there. Any help would be appreciated.