Factors such as geometry of the neighboring cells, the RF environment and the number of measured beacons can limit the usefulness of ECID. The GMLC can be tasked by the SMLC node to query the HLR for identity information on LMS detected mobile devices as well as being tasked to issue Any Time Interrogation (ATI) messages to the Mobile Switching Center (MSC) to cause the mobile to transmit a Page R