NPD

Written by Intrado | Jul 25, 2024 10:23:07 PM

Number Plan Digit. A component of the traditional 9‐1‐1 signaling protocol between the 9‐1‐1 control office and the

PSAP CPE. Identifies one of four possible area codes. Needed because CAMA trunks do not allow for transfer of the ten‐

digit TN.

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