Methods and apparatus for transmitting accurate emergency location identification numbers (ELINs) from behind a multi-line telephone system (MLTS) after an emergency caller disconnects

An apparatus for processing an emergency call made from behind a PBX/MLTS using an analog or digital telephonic device, said apparatus comprising:

• (a) a database of attributes associated with each of the telephonic devices from which said emergency call was made, said attributes comprising at least one ELIN and callback number associated with each of the devices/trunks coupled to the PBX/MLTS;
• (b) retrieval means coupled to said database for retrieving one or more of said attributes from said database;
• (c) buffer means coupled to said retrieval means for temporarily storing one or more of retrieved attributes at the PBX/MLTS;
• (d) transmitting means coupled to said buffer means for autonomously transmitting one or more of said retrieved attributes to an emergency call handling center upon detecting an on-hook event at the telephonic device and prior to disconnecting the call at the PBX/MLTS.