Methods for accurate transmission of ELIN/callback number from an emergency
caller calling from behind a PBX/MLTS include assigning a port equipment
number to each device/trunk of the PBX/MLTS and associating ports/devices
with ELINs and callback numbers. The apparatus of the invention detects an
emergency number, assigns the call priority, and uses the port/device
number to determine the ELIN/callback number and properly transmit the
ELIN/callback number over a private network for far-end hop-off to the
public network PSAP.
