Legacy PSAP Gateway (LPG)
The LPG is a signaling and media interconnection point between the NG9-1-1 Emergency Services Network and legacy PSAPs. It is responsible for interworking the SIP signaling to the Traditional MF or Enhanced MF (E-MF) signaling supported by the legacy PSAP and is responsible for providing emergency services-specific processing associated with transfer requests to and from legacy PSAPs and for processing location information.