FGD (Feature Group D)

FGD (Feature Group D) is an MF signaling protocol, originally developed to support equal access to long distance services, capable of carrying one or two ten-digit telephone numbers.


 * NENA-INF-008, NENA NG9-1-1 Transition Plan Considerations Information Document
 * NENA 03-002, NENA Standard for the Implementation of Enhanced MF Signaling, E9-1-1 Tandem to PSAP